Journal of Threatened Taxa |
www.threatenedtaxa.org | 26 June 2020 | 12(9): 16021–16042
ISSN 0974-7907 (Online) | ISSN 0974-7893
(Print)
doi: https://doi.org/10.11609/jott.5668.12.9.16021-16042
#5668 | Received 31 December 2019 | Final
received 05 May 2020 | Finally accepted 14 May 2020
Additions to the cicada (Insecta: Hemiptera: Cicadidae) fauna of India: first
report and range extension of four species with notes on their natural history
from Meghalaya
Vivek Sarkar 1, Cuckoo
Mahapatra 2, Pratyush P. Mohapatra 3 & Manoj V. Nair 4
¹,2
North Orissa University, Department of Zoology, Sri Ram Chandra Vihar,
Takatpur, Mayurbhanj, Baripada, Odisha 757003, India.
3 Zoological Survey of India, Central Zone
Regional Centre, Jabalpur, Madhya Pradesh 482002, India.
1,4 WII-C2C,, Wildlife Institute of India,
Chandrabani, Dehradun, Uttarakhand 248001, India.
4 Lal Bahadur Shastri National Academy of
Administration, Charleville, Mussoorie, Uttarakhand 248179, India.
1 viveksarkar87@gmail.com (co-corresponding
author), 2 mahapatracuckoocicada@gmail.com (corresponding
author),
3 pratyush.m@zsi.gov.in, 4 manojnair74@gmail.com
Editor:
K.A. Subramanian, Zoological Survey of India, Chennai, India. Date of publication: 26 June 2020
(online & print)
Citation: Sarkar, V., C. Mahapatra, P.P. Mohapatra & M.V.
Nair (2020). Additions to the cicada (Insecta: Hemiptera:
Cicadidae) fauna of India: first report and range extension of four species
with notes on their natural history from Meghalaya. Journal
of Threatened Taxa 12(9): 16021–16042. https://doi.org/10.11609/jott.5668.12.9.16021-16042
Copyright:
© Sarkar et al. 2020.
Creative Commons Attribution 4.0 International License. JoTT allows unrestricted use, reproduction,
and distribution of this article in any medium by providing adequate credit to
the author(s) and the source of publication.
Funding: Rufford Foundation, UK under the Rufford Small Grant programme
(Project: Study on Cicada Diversity and Preparation of Country’s First Cicada
Call Library in Garo-Khasi-Jaintia Hills Complex of Indian State of Meghalaya.
RSG Reference: 21132-1); Hem Chand Mahindra Foundation (Project: Adi Hill
Expedition, 2018).
Competing interests: The authors declare no competing interests.
Author details: Vivek Sarkar is World Heritage Assistant
at Category-2 Centre of Wildlife Institute of India, Dehradun and is pursuing
PhD from North Orissa University on the taxonomy and natural history of cicadas
in Meghalaya. He received a Small Grant from the Rufford Foundation in 2017 to
study the cicadas of Meghalaya. Cuckoo
Mahapatra is Assistant Professor of Zoology at North Orissa University,
Baripada, Mayurbhanj, Odisha. Her research interest is on development biology
studies in amphibians and reptiles and she also works on faunal diversity of
Odisha. Pratyush
P. Mohapatra is working as Scientist-D at Zoological Survey of India,
Jabalpur. He works on taxonomy and conservation of various faunal groups of
Indian region. Manoj V. Nair is an Indian Forest Service officer of the
Odisha cadre who is serving as Deputy Director at LBSNAA, Mussoorie, on deputation.
He served as Scientist-G at Wildlife Institute of India prior to this and
during his tenure at WII, he took part in many biological expeditions.
Author contribution:
VS—conceived the project, collected samples, recorded acoustics and other field
data, inspected collected specimens, compiled data, verified records, and wrote
the manuscript. CM—assisted in
manuscript writing and verified records.
PPM—assisted in manuscript writing and verified records. MVN—collected
samples and related field data for Dundubia annandalei and Balinta tenebricosa
in 2019, assisted in manuscript writing and verified records.
Acknowledgements: Sincerest thanks to Meghalaya Forest Department for
granting the permission to work and providing logistical support throughout the
field work. VS is in debt to former Director of Wildlife Institute of India,
Vinod B. Mathur and former Dean Gopal S. Rawat for allowing him to participate
in Adi Hill Expedition in 2018 and Arunachal Forest Department for allowing us
to carry out month long survey. VS would also like to thanks present Director
of Wildlife Institute of India Dhananjay Mohan and Faculty In-charge of WII
Category-2 Centre, Gautam Talukdar for all the support. PPM would like to thanks
Director, Zoological Survey of India (ZSI) and Office-in-Charge, ZSI-CZRC,
Jabalpur for necessary facilities. VS and CM are grateful to the Head of the
Department, P.G. Department of Zoology, North Orissa University for hosting
this research. Thanks are also due to Sudhanya Hajong, Khlur Mukhim, Paila
Swire, Mrs. Macdalin, Mrs. Dari, Desmond Malai, Vicky Singh, Rhodison
Thangkhiew, Blasting, Lastborn Swire, Garry Swire, Bevan Swire, Rio Swire, Raja
from Khasi hills and Tushar Sangma, Santosh Sangma, James, Kendis, Bull,
Maybin, Centiber, and Rafael from Garo Hills for logistical support and
assistance in field work; headmen of Cherrapunjee, Mawkisiyem, Maraikaphon,
Pomsomen, Mawsinram, Chimitap and Rongra villages for permitting the work in
the village sacred grooves and also for hosting the research team at multiple
occasions and facilitating the field work. A very special thanks to Riba Tugo
for assisting in the survey towards the end of the field work. Special thanks
to Pushpal Goshwami for assisting in the field work in Northern Bengal and also
contributing the image of tymbalizing male of Dundubia annandalei and
Pathik Saha, and Priyam Chakrabarty for monitoring the activity of this species
in West Bengal for the year 2018 and 2019. Heartiest thanks to Upma Manral for
her continuous support and reviewing the manuscript, Anuranjan Roy for his
editorial inputs and Anukul Nath for preparing the map. Very special thanks to
Pratap Singh for providing all technical support in the documentation of
acoustic data and Abhijit Das for providing opportunity to become part of ‘Adi
Hill Expedition’ in 2018 during which we could add one new distribution report
of Orientopsaltria fangrayae. All the specimens mentioned in this paper
are deposited in the Research Collections Facility of National Centre for
Biological Sciences, Bangalore for which we are grateful to Krushnamegh Kunte.
This work was fully funded and supported by the Rufford Foundation, UK under
the Rufford Small Grant programme (RSG Reference: 21132-1). The Arunachal
Pradesh field work was funded and supported by Hem Chand Mahindra Foundation.
Abstract: In order to broaden our
understanding about cicada diversity of northeastern India, a comprehensive
survey was conducted in the year 2017, in Garo, Khasi, and Jaintia hills of
Meghalaya and an occasional opportunistic survey was carried out in northern
West Bengal and Arunachal Pradesh. During
these surveys, we came across four species of cicadas, viz., Meimuna
duffelsi, Dundubia annandalei, Balinta tenebricosa, and
Orientopsaltria fangrayae, which were not reported from India
earlier and among them the genus Orientopsaltria is being reported
for the first time from the country.
This work provides an account of the taxonomy, natural history,
distribution, and acoustics of these four species of cicadas along with their
attribute to the culture and customs of the indigenous tribes of the landscape.
Keywords: Acoustics, Garo Hills, Jaintia
Hills, Khasi Hills, new distribution report, natural history, northeastern
India, northern Bengal, Orientopsaltria, taxonomy.
INTRODUCTION
Considering the crucial biogeographic role that the Indian subcontinent
plays and the fact that the generic diversity of cicadas in India ranks highest
in the world, it is unfortunate that very little research has been conducted on
them since the early part of the 20th century (Price et al.
2016). In order to aid in the
understanding on the cicada diversity of India, we conducted rapid surveys from
February to December 2017, in different localities of Garo Hills, Khasi Hills,
and Jaintia Hills of the Indian state of Meghalaya which falls under the
Indo-Burma biodiversity hotspot. We also
conducted an opportunistic survey in the northern parts of West Bengal from the
year March 2014 to
May 2019 and in Assam in the year 2017 and 2018 where the cicadas were only
recorded and observed but not collected.
A more focused survey was conducted in Arunachal Pradesh in October 2018
where cicadas were extensively sampled.
The primary objective of these surveys was to prepare an inventory of
cicadas of the region, along with their natural history and acoustic
profiling. During the study period, we
came across many known and lesser-known species of cicadas along with some
interesting species. After a proper
taxonomic diagnosis and call analysis of those, four of them, viz., Meimuna
duffelsi Boulard, 2005, Dundubia annandalei Boulard, 2007, Balinta
tenebricosa (Distant, 1888), and Orientopsaltria fangrayae Boulard,
2001 turned out to be new reports for India.
MATERIAL AND METHODS
Most of the cicadas in the field were spotted by their calls. Individual cicadas were observed through a
Canon EOS-600D Rebel T3i Digital SLR with Sigma 70–300mm APO-Digimacro lens,
and the observed behavior was noted down.
All the cicadas were collected by a sweeping hand net. A few of the specimens of Dundubia
were collected using a light trap. After
collection, two legs and part of the thoracic tissues were extracted in order
to preserve the DNA for future molecular work.
Each insect was fixed with a pin through the mesonotum with wings
outstretched after the extraction of tissue.
After fixing the insect it was kept in a hot air oven for 48 hours at
56⁰ C. Panasonic Lumix DMC FZ-35 and Canon EOS-600D Rebel T3i DSLR with Sigma
70–300mm APO-Digimacro lens was used to photograph the live cicadas in the
field where the same camera along with a Canon 100mm Macro lens was used to
photograph the specimen for morpho-taxonomic work. Live cicadas were photographed as instructed
in Sarkar (2015). A Canon 18–55mm lens
with reverse mount ring was used to take images of the male genitalia. After taking images of different parts of the
male genitalia, multiple images were stacked in Adobe Photoshop 7.0 for proper
representation of the male genitalia.
Image plates were prepared in Adobe Photoshop as well. The terminology used for the description of
the adult cicada is adopted from Moulds (2005).
Morphometric measurements of the adult cicadas were taken from images
using ImageJ (64-bit Java 1.6.0) software.
The measurements presented here are adopted from Sarkar (2019) (Figure
1). The male tymbalization was recorded
using Telinga unidirectional microphone with parabola connected to Zoom H6
digital sound recorder. The sound was
recorded in .WAVE format at a sampling rate of 48Khz in 24 bit dynamic
range. The recorded sound files were
transferred to HP Notebook laptop powered by Intel core i5, 7th
generation for further analysis. For
viewing, analysing song signals, and preparation of ‘Cards for Identification by
Acoustics’ (here onward mentioned as CIA), Raven pro 1.5 (Cornell Lab of
Ornithology) was used, and Microsoft Excel was used for statistical evaluation.
RESULT AND DISCUSSION
Meimuna duffelsi Boulard, 2005
(Figure 2; Table 1; Images 1, 2, 3)
The species belonging to the genus Meimuna Distant, 1905 has
clear wings; the males have tymbal covers as wide as their length with external
edges close to the opercula, but not attached; male abdomen significantly
longer than the forebody; head broader than the mesonotum; pronotal margin has
one tooth almost at the middle (Distant 1905; Boulard 2013). This genus is represented by seven species in
India (including Bangladesh), viz.: M. cassandra, M. gamameda, M. microdon,
M. pallida, M. silhetana, M. tripurasura, and M. velitaris
(Sanborn 2014; Price et al. 2016). Meimuna
duffelsi stands out from rest of the species by its stocky opercula and
large rich brown abdomen and, in addition, the series of spots on the dorsal
side are considerably underdeveloped compared to its closely related species
(Boulard 2005; Boulard 2013). The male
genitalia of the collected specimen are as same as the one represented in
‘Cicadas of Thailand, Vol. I’ (Boulard 2007a).
Collected specimen
Specimen Code: VS-AA219,
01.v.2017, 1 adult male; VS-AA220, 01.v.2017, 01.v.2017, 1 adult male;
VS-AA221, 01.v.2017, 1 adult male; VS-AA222, 01.v.2017, 1 adult male;
NCBS-PZ562, 11.v.2014, 1 adult male. Four specimens were collected in 2017,
from one of the streams in the outskirts of Mawlynnong Village of East Khasi
Hills District and out of these four, only one (VS-AA222) is presented in the
paper. Apart from that a single specimen
was collected in 2014 from Ribhoi District.
Description
Head: The head is dark from above, almost the entire epicranium is black
except the thin area adjacent to the eyes and the ocular tubercle towards the
pronotum which appears as an imperfect squarish pale olive green patches with a
black dot in the centre in the live insect.
Postclypeus is dark throughout the median region which spreads toward
the frontoclypeal suture and anteclypeus.
Spaces between the pale transverse grooves of postclypeus are dark. The front of postclypeus has a pale olive
green streak at the middle in the live insect which turns rich brown in the
pinned specimen. The eyes are dark
brown, almost appearing black in the live insect. The ocelli are white in the live insect which
turns pale sanguine in the pinned specimen.
The median ridge of dark anteclypeus is pale brown with olive green which
broadens towards the postclypeus. The
mentum and labium is pale brown in colour even in the live specimen with 1/5th
darker region at the tip of the labium.
The frontal and dorsal part of the specimen is smooth but the ventral
part of the head is covered with a fine white hair like structure gena and
mandibular plate onward which turns brown in the pinned specimen.
Thorax: Entire thorax is different shades of dark green from top in live
insect which turns pale brown in the pinned specimen (Image 1.A, 1.F). Pronotum has dark green base colour. The median part of the pronotum has a black
bordered, inverted Christmas tree shaped patch with oval apex (Image 1A). The black border of this oval-apex inverted
Christmas tree has a broad base towards pronotal collar and even broader base
toward the head. The paramedian fissure
is dark, broken almost at the centre and approaching the black border of the
median patch but not adjoining. A faint
trail of black line goes down toward the pronotal collar from the middle of the
paramedian fissure. The ambient fissure
is dark which is in contiguity with the dark lateral fissure, giving an
impression of a Trapezium. The dark edge
of pronotal collar extends below lateral angle, towards mesonotum. Mesonotum is green with a tinge of pale
yellowish brown towards the upper side with paler upper lateral sides. Mesonotum has a median dark arrow mark
pointing towards the scutellum.
Submedian sigilla have a club like black patch towards the outer side in
such a way that parapsidal suture is at the outer edge of this club-shaped
patch. There is a small triangular spot
at the inner side of lateral sigilla, towards the base of the club-shaped patch
of submedian sigilla. The outer edge of
lateral sigilla have a dark elongated patch which somewhat resembles the blade
of an imperfect bowie knife. The scutal
depression is covered by a comma-shaped spot which extends to the upper arms of
cruciform elevation. Metanotum is
brownish green in the live insect and uniform pale brown in the pinned
specimen. Thorax below is green and
yellow, covered with fine white coloured hair like structure. Coxa is entirely green in fore leg, yellowish
green with a triangular yellow patch in mid leg and yellow with green in
meracanthus in hind leg. The trochanter
is yellowish green in fore leg, predominantly yellow with traces of green in
mid leg and entirely yellow in hind leg.
Femur is green to yellowish green in all legs, most greenish in fore leg
and most yellowish in hind leg. Primary
and secondary spine of the for femur is entirely greenish yellow with darker
tips. The tibia of fore and mid legs are
distinctly green to turquoise towards the outside and brown towards the inner
side without any diffusion in the middle.
In hind leg, the green is prominent towards the outer side and they
start turning yellowish from the starting of the tibial spur and turns entirely
yellow towards the tibial comb. The
tibial comb and the tibial spurs are dark rich brown. The triangular orange
operculum has green at the base and partially covered with white hair like
structure. Operculum have prominent orange ridge at the edges. Operculum can reach till 6th
abdominal sternite in the live males as the abdominal segments contract in,
however, the tip of the operculum can be between 5th to 6th
sternites in the pinned specimen depending on the stretching of the
abdomen. Both wings are entirely
transparent without even any apical infuscations in the fore wings. The basal veins are green including the basal
part of the costa whereas the other veins are black in the fore wing. The basal membrane of the forewing is greyish
brown. The costal vein till radius
anterior, the entire cubitus anterior veins and the 1st anal vein
except the marginal area is green in colour where rest of the veins in hindwing
are black.
Abdomen: Whole abdomen is rich brown, overlaid with golden hair-like
structures at the dorsal side and paler at the ventral side with overlaying of
fine white hair-like structures. All the
sternites are light rich orange coloured and covered with fine white scales
towards the hypopleurite. Epipleurites
have a rich chestnut base colour which appears darker than the base colour of
sternites and entirely covered with fine white scales. The first tergite is entirely black with the
traces of rich brown at the part adjoining to the scutellum. The second tergite has thin black area
adjacent to the 1st tergite which looks like a continuity of
it. The mid dorsal area has an imperfect
triangle or rather a trapezium shaped black patch which also appear as a
continuity of the black 1st tergite.
This spot does not adjoin the lower part of the 2nd tergite. 3rd
Tergite has the imperfect ‘T’ shaped spot where the upper area of the ‘T’ is
nearly as broad as the space between the tymbal covers. Similar but thinner median T-shaped spot also
occurs in the 4th tergite. 5th
and 6th tergites has traces of these median black spots on
them. 3rd, 4th and
5th tergites have deficiently triangular lateral black spots and 6th
tergite has more of an oblong spot.
Male Genitalia: The pygofer is pale brown, cup shaped, with an oval
opening from where the bifurcated, dark claspers come out. One of the two arms of the bifurcated
claspers is long, tapered and curved and the other arm is small, undeveloped
and situated towards the outer side.
Median lobe of the uncus rudimentarily pointed. The upper lobe of pygofer is in a continuum
with joint basal lobe providing a contiguous edge of the cup shaped pygofer.
Distribution
The only known distribution of this species was from Thailand until now
(Boulard 2005a,b, 2008a,b, 2014) and this will be its first record outside
Thailand. We recorded the species from
Norpu Wildlife Sanctuary and Dawki of Jaintia Hills and Mawlynnong, Shella,
Saiden, and Nongpoh of Khasi Hills and apart from these localities, the species
was also seen and heard in Rani Reserve Forest of Assam (Figure 2). This species is likely to occur in areas that
are south of Bramhaputra River, including parts of southwestern Assam, Manipur,
and Mizoram having its preferred habitat.
Bionomics
Habitat type: The species predominantly prefers the riparian forests of
hilly torrential streams.
Annual appearance period of adults: The first individual was spotted in
second week of April during the field work of 2017 and they were active till
the end of May. In the second week of
May 2014. We spotted one individual
mud-puddling in community reserve of Iewsier, Saiden Village of Nongpoh, and
was caught by Dr. Krushnamegh Kunte.
Behaviour: Sun-loving and dendrophilous in nature. In sunny morning, the males usually call from
the higher perches of tall trees and as the day progress they come down to the
under growth and often emit sound signals from the small bushes adjacent to the
stream. By the latter part of the
morning when the day turns hotter, the males emit sound from the seepage and riverbed
while drinking water. Meimuna duffelsi
is one of the very few well studied cicadas due to their unique behaviour. This is one of the very few cicadas that
exhibits the phenomenon which is popularly known as ‘mud-puddling’ in case of
lepidopterans. The males of this species
settle down in the wet patches, often adjacent to small streams and river banks
and suck water from the seepage or wet soil or smaller water pool on large
rocks and consistently excrete water like a jet spray from the tip of the
abdomen. We have seen multiple males
group together in such puddling and even producing a synchronized sound. Michel Boulard, who discovered this cicada
from north of Chiang Mai Province, Thailand in 2004, named such puddling site
“duffelsi pub” in his cicadas of Thailand book (Boulard 2013). Boulard described this phenomenon in great
details on multiple occasions (Boulard 2005, 2006, 2013). If disturbed, the males fly straight up and
settle on higher parts of the adjacent tree trunk or the high branches. Usually one alarmed cicada starts a series of
chain reaction that makes all the cicadas fly within a few seconds. The males of this cicada were also seen
drinking from wet forest floors of Saiden and Lewsier community forest, Ribhoi
District, Meghalaya. We observed large
congregation of this cicada on the stony riverbed of the torrential streams of
Mawlynnong and Shela of East Khasi Hill District. In the first week of May 2017, a few
individuals were also spotted in a seepage situated at the edge of Ramakrishna
Ashram boundary at Shela. The species
was never reported from the upper part of Meghalaya and they occur at a maximum
height of 880m at one of the hill streams of the Jaintia Hills.
Acoustic: Image 3.A showing two complete sequences of calling
tymbalization. Each begins with
preliminary sizzling phase (G) which consist of gradually increasing groans and
alternate short bursts of whistle like crackling (g). Although the overall call and the spectrum
matches the description given by Boulard (2013) but, unlike his finding, we
found the average spectrum centred at 2660Hz.
Image 3.B showing the temporal spectrogram of two different frequency
zone G and mgs/MS phase which alternate with exact repetitiveness. Image 3.C magnifies the selected area in
Image 3.B and showing the alternate crackles and whistling (g) of the group of
modules (mgs) becoming shorter as the call progresses till they get completely
replaced by only the whistle phase which is a much condensed module (MS). According to Boulard (2013), every MS module
ends with the very fleeting but powerful emission of sound which goes up to
18000 Hz.
Proposed common name
Based on the unique behaviour the common name proposed for this cicada
is Duffels’ Drinking Cicada.
Justification
Originally Boulard, the authority on this species, termed this cicada as
‘Sand Cicada’ as he saw the mass aggregation of males of this species for
mud-puddling in the sandy banks of torrential Huai Mae Kam Pong River in the
month of April–May (Boulard 2013). The
males often tymbalize while sucking water from these sandy banks. The substrate of the river banks chosen by
this cicada is not necessarily always sandy.
It has been observed in our study area that this cicada drinks from the
seepage of mud banks next to the village roads, wet humus soil of the forest
floor, as well as the stony river banks.
Drinking is a unique trait in this cicada that makes it stand out from
most of the cicada of its preferred habitat and only seen in a very limited
group of cicadas.
Dundubia annandalei Boulard, 2007
(Figure 2; Table 1; Images 4, 5)
The species belonging to the genus Dundubia Amyot &
Audinet-Serville, 1843, have a head wider than mesonotum, postclypeus fairly
prominent; rostrum scarcely or not reaching the posterior coxae; thorax with
pronotal collar laterally amplified and rounded, then towards the front marked
with one or several denticles, sometime faint; male opercula monochromatic,
hyper-devoloped, well separated at the base and more than two third of the
abdomen length; male abdomen equal or mostly longer than the forebody; tymbal
covers dorsally closing the dorsal acoustic chambers, but not adjoining the
opercula laterally, revealing the tymbals at the side (Distant 1906; Boulard
2013). This genus is represented by nine
species in India, viz.: D. emanatura Distant, 1889, D. ensifera
Bloem & Duffels, 1976, D. hastata (Moulton, 1923), D.
laterocurvata Beuk, 1996, D. nagarasingna Distant, 1881, D.
oopaga (Distant, 1881), D. rufivena Walker, 1850, D. terpsichore
(Walker, 1850), and D. vaginata (Fabricius, 1787) (Sanborn 2014; Price
et al. 2016). Dundubia annandalei stands
out from all other species due to its uniform grass-green colour and the
comma-shaped male opercula. This cicada,
however, has confused many workers due to its morphological similarities with Dundubia
terpsichore as pinned specimens of both the species are brown and both of
them have similar shaped opercula. These
twin species were initially thought to be distinguished only based on the male
tymbalization, however after studying both the cicadas in nature, Boulard found
out that Dundubia annandalei is teneral-looking, uniform green when live
and turn brown in the pinned specimen unlike Dundubia terpsichore which
is brown, alive or dead (Boulard 2013).
Collected Specimen
Specimen Code: VS-AA532,
14.v.2017, 1 adult male; VS-AA533, 14.v.2017, 1 adult male; NCBS-AK278,
10.v.2015 1 adult male; NCBS-AK279, 10.iii.2015, 1 adult male.
Two specimens were collected in 2017, from Karwani Village of Baghmara,
South Garo Hills District, Meghalaya and out of these two, only one (VS-AA532)
is presented in the paper. Apart from
them, two male specimens were collected in 2015 from Koler par Village,
Coochbehar District, West Bengal.
Description
Head: The entire head is leaf green with orange to golden eyes and pale
sanguine ocelli. The anteclypeus and
mentum is also leaf green but the labium of the rostrum is brown which turn
darker towards the piercing end. The
pedicel of antenna is usually green with brownish second flagellomere but in
relatively freshly enclosed individuals the entire antenna appear green after
developing colour.
Thorax: Thorax is also leaf green in colour. The younger individuals have minute silvery
hairs on the body making the body appear as greyish green which later turn leaf
green with yellow patches towards the end of their lifecycle. The base of the legs, viz., coxa and
trochanter, however, are always yellow, irrespective of the age and so is the
tip of the leg, viz., tarsus and claw, which is yellowish-brown. The opercula are elongated comma shaped with
prominent ridge. Wing is completely transparent. The basal veins are that of the body colour
which turn darker towards the marginal area.
In older specimen, the basal vein of the forewing can turn
greenish-yellow or completely yellow.
The radius and subcostal vein is dark roseate brown to black in
appearance.
Abdomen: The abdomen is mostly in same green colour like rest of the
body except the median part of all the eight sternites which varies from
yellowish-green to rich yellow.
Male genitalia: Upper lobe of pygofer reduced, exposing the base of the
clasper. The clasper has two pointed
lobes split vertically, make it appear as inverted ‘Y’ from the side, giving an
impression of the claw of a crab. Each
of these lobes are further bifurcated in two outwardly curved pointed
projections, forming a structure of inverted ‘V’ toward the distal end. Median lobe is attached to the upper part of
the clasper leaving an opening for the head of the aedeagus. Anal tube and anal style are prominent.
Distribution
This cicada was first observed by Annandale in Phatthalung region and
later described by Boulard from Thailand and the occurrence of this species has
been reported from Thailand, Malacca and peninsular Malaysia (Boulard 2003,
2007a,b, 2008b). Boulard found this
cicada in the surroundings of Lampang, surroundings of Ban Mae Kam Pong and in
the King’s orchard of Chiang Mai Province and Wiang Papao, near Wang Nua and
Ban Pha Kang of northern Thailand whereas it has been recorded in Tungka Forest
of Ranong Province and Khao Sok rainforest of Surat Thani Province in southern
Thailand (Boulard 2007a). This cicada is
widespread in Meghalaya, Assam, and West Bengal. We have recorded this cicada in the lower to
mid elevations of Meghalaya such as almost the entire Ri-bhoi District; Norpu
Wildlife Sanctuary, Dawki, Umsyiem, Burhill and adjacent areas of Riwai-Dawki
Road of Jaintia Hills; Mawlynnong, Shella and the lower part of Mawlong-Tyrna
road and all other low elevation areas from Khasi Hills; and the entire Garo
Hills except the peak of the Nokrek National Park and a few parts of the
Balpakram National Park plateau. The
species has also been recorded in the plains of Assam such as Karimganj,
Silchar, Haflong, Guwahati, Boko, Dudhnoi, Goalpara, Joghigopa, Nalbari,
Bongaigaon, Barapeta, Manas National Park, Kokrajhar ,and Dhubri. In northern part of West Bengal, the species
is distributed similarly in the foothills and the plains of Coochbehar, Alipur,
Jalpaiguri, Siliguri, foothills of Darjeeling, and all the way to the lower
elevations of Sikkim (Figure 2) making it a desideratum for the foothills of
eastern Nepal.
Bionomics
Habitat type: This cicada is an epitome of generalists, recorded in the
secondary hill forests, primary riparian forests, disturbed and degraded
forests in the hill slope of Jhum plantation, fragments of kitchen gardens in
the vast paddy fields of Assam and Bengal, avenue plantations of the state
highways and national highways, children’s park, almost omnipresent through its
range. This cicada can often be heard in
the middle of heavily urbanised locations as well such as in the middle of
Guwahati, Siliguri or Cooch Behar.
Annual appearance period of adults: As Boulard recorded in Thailand,
this cicada is mostly active between February to April (Boulard 2007). We have recorded this cicada between March to
May between 2013 to 2018. Most likely
the emergence of this cicada is rain driven.
They show irregularities in their emergence timing. For example, in 2015 the cicada emerged in
great numbers in the first week of March, whereas in 2017 the species emerged
in the third week of April and stayed till the first week of June. In 2019, the species emerged in the last week
of January in a few places in southeastern Meghalaya and northern West Bengal
and stayed on until April. Their annual
emergence pattern and the driving factors of the emergence event are yet to be
explored and subjected to long term monitoring.
Behaviour: The male of the species calls rigorously right before the
sunrise in the morning along with Pomponia sp. during April–May. It is followed by a prolonged pause from
06.00h to almost 11.00h after which they again start calling. Initial calls have irregular intervals
inbetween which gradually decrease as the day progresses and the calls become
more rigorous in the late afternoon with almost no intervals in between. Locally this cicada is known as ‘Phegol’ in
most part of the South and West Garo Hills whereas in parts of Assam such as
Boko Village, it is known as ‘Phodaning’ or ‘Phodaring’. Both the names having no particular meaning
and mostly refer to pale-coloured cicadas, even soft bodied teneral
cicadas. But it has been recorded in
Daribokgre Village of East Garo Hills that this cicada is known as ‘Phegol’ and
Euterpnosia madhava is known as ‘Phodaning’ or ‘Phodaring. In Ri-Bhoi
District of Khasi Hills it is called ‘Jamalang’, comprising two words, ‘Jah’
and ‘Malung’ meaning ‘food’ and ‘soft body’, respectively. In this region, collection of teneral Chremistica
ribhoi as a source of food is a common practice in the mass emergence year
(Hajong & Yaakop 2013). The
coloration of matured and hardened Dundubia annandalei is very similar
to the newly emerged teneral cicada which makes it a preferred food for local
communities hence this species along with Euterpnosia madhava is a
popular source of nutrition in the region.
Both the sexes are attracted to light.
The locals light up torches and beat two dry sticks to attract this
cicada, a technique used for collection of the adult Chremistica ribhoi
as well. Though it is a known practice
yet not documented by Hajong (Hajong 2013), as only the matured and hardened
adult cicadas get attracted by this technique and not the soft-bodied teneral
cicadas which are preferred as a local delicacy. Although D. annandalei
is attracted to light, the beating of sticks bring more individuals to light
which we documented in April 2017 in Baghmara.
The male cicadas perhaps perceive the sound of this stick
beating as the female wing flicking response signals. Male calls by lifting their bodies up (Image
5A).
Acoustic: Image 5B representing temporal oscillogram of 128 seconds of
tymbalization of this species. The call consists of two parts, repeating for
alternately for long time, sometime more than 30min. The relatively longer and melodious comb
scrapping that lasts for about 6.8 to 8.8 seconds, consists of 18 to 21 number
of equidistant pulses. In between these
comb scraping, there is crackling sequence which lasts for around 2–4
seconds. Image-5.C magnifies the
selected part of temporal oscillogram of Image 5B, representing the 18 pulses
of the longer and melodious comb scrapping sequence.
Proposed common name
Based on the male tymbalization, the name ‘Comb Scraper’ seems
appropriate for this species.
Justification
The tymbalization of the males of this species resembles the comb
scraping sound.
Balinta tenebricosa (Distant, 1888)
(Figure 2; Table 1; Images 6, 7, 8)
Balinta tenebricosa was described from the ‘Teinzo on the Moolay River’
originally as Gaeana tenebricosa (Distant, 1888). The genus Balinta, however, differs
from Gaeana by having its head obliquely depressed in front of eyes, not
longer than pronotum and having the widest part of tegumina only about
one-third of the length of the tegumina (Distant 1905). There are three species of Balinta
that are known from India (including Bangladesh), viz., Balinta delinenda
(Distant, 1888), Balinta octonotata (Westwood, 1842), and Balinta
sanguiniventris Ollenbach, 1929
(Price et al. 2016); among them B. tenebricosa resembles closely B.
octonotata. But, as the name
suggests, B. octonotata has four distinct white spots in each tegumina
which gave them an impression of a black cicada with eight prominent white
spots from above and the colour of the abdomen is rich sanguine with dorsal
black spots whereas B. tenebricosa, as the name suggests, have
completely black abdomen and have three small spots on the wing. Apart from Burma or present-day Myanmar
(Distant 1888, 1905; Metcalf 1963; Boulard 2013; Sanborn 2014; Price et al.
2016), B. tenebricosa has been collected from Tonkin in Vietnam
by R.V. de Salvaza (Price et al. 2016), Laos (Metcalf 1963), Guangxi in China
(Sanborn 2014), and Thailand (Boulard 2007a, 2013; Sanborn 2014).
Collected specimen
Specimen Code: VS-AA276, 17.v.2017, 1 adult male; VS-AA268, 15.v.2017, 1
adult male. Two specimen were collected
in 2017, one from the Chimitap Village and another from Hatisia Village of
South Garo Hill District and out of these two, only one (VS-AA268) is presented
in the paper.
Description
Head: Head is creamy white to yellow from the top with black frons,
ocular tubercle and supra-antennal plate.
Eyes dark brown with prominent pseudopupil in the live specimen. Ventral part of the head is mostly black,
anteclypeus, lorum, and vertex black.
Postclypeus broadly black at the centre with yellowish-orange at the
adjacent edge of anteclypeus and lorum and turns paler towards the epistomal
suture. The transverse grooves of
postclypeus entirely black which appear as series of black lines towards the
yellow edge.
Thorax: Pronotum dorsally black with pale patches at the edge joining
the head and pronotal collar. A pale
median longitudinal fascia continues from the pale area adjacent to the head
and narrows down the most at right before the imaginary confluence point of two
paramedian fissure, from where it widens and form a club like shape which joins
the pale pronotal collar. The base of
paramedian fissure is pale and broad which narrow down and appear as a traces
of pale line along the fissure as it moves towards the pronotal collar. The pronotal collar is entirely
yellowish-beige with a very thin dark edge towards the mesonotum and dark
lateral angle. Mesonotum entirely black below with all the legs entirely
black. Dorsally the submedian sigillas,
lateral sigillas and the area adjacent to scutal depressions are entirely
black. Area between submedian sigilla
and lateral sigilla pale which runs towards the pale scutellum, constituting
dorsolateral pale fasciae which are narrow and more yellowish towards the end
adjacent to submedian sigilla and broadens at the posterior end. Metanotum rich orange till wing groove. Scutellum prominently pale creamy white which
looks like the extension of pale elongated dorsolateral fascia of
mesonotum. The borders of scutellum have
traces of dark colouration which continue with the dark area adjacent to scutal
depressions anteriorly and of uniformly dark first tergite posteriorly. Forewing dark brownish-black with three pale
yellowish spot. Hindwing bright red with
very broad dark outer border, making the red restricted to almost one third
basal area of the wing. However, the anal lobe is only about one third black at
the outer edge.
Abdomen: Entire abdomen is black.
The overlaying brown hairs may give the appearance of the abdomen
bronze-brown.
Male genitalia: The male genitalia identical to the one represented in
the Cicadas of Thailand (Boulard 2013).
The pygofer is dark towards the upper side with a thin pale band and
paler on the side and base but the colour varies from individual to
individual. There are males recorded
with entirely dark pygofer as well. The
upper and basal lobe of pygofer is fused and appear as a ridge. Pygofer very similar to that of the B.
octonotata as illustrated by Hayashi (1978a & b) but unlike it the
distal shoulder of pygofer is not protruded and pointed dorsally and in
addition the pygofer is broader at the base toward the basal lobe and narrows
down towards the apex where as in B. octonotata the entire pygofer
appear as oblong rectangle. Median lobe
of uncus is prolonged and bifurcated from where the aedeagus comes out. Aedeagus tapered ridge like structure which
often appear as a hook at the opening.
The claspers appear as globous structure at the base of the median lobe
of uncus.
Distribution
This species was only seen in the southern areas of Garo Hills whereas
in Ribhoi, Khasi Hills and Jaintia Hills of Meghalaya, parts of Assam, northern
West Bangal and Chhattisgarh the species gets replaced by Balinta octonotata. The species was seen in different forested
areas between Baghmara Reserve to Balpakhram National Park not in continuity
but in fragments. We have recorded this
species in Karwani, Baghmara Reserve Forest, Gongrot, Hatisia, Chimitap,
Rongcheng, Tura Peak, Nokrek National Park, and Balpakhram National Park
(Figure 2).
Bionomics
Habitat type: The insect was seen
both in primary and secondary forests of the hill slopes and foot hills in Garo
Hills. An association of species’
presence with the forest patches with lot of soft bodied climbers as well as
lianas was noticed.
Annual appearance period of adults:
In the year 2017, this cicada was first recorded in the third week of
April and the last individual was recorded in the second week of June. The peak of activity was recorded between the
second and third week of May.
Behaviour: The cicada is dendrophilous and shade loving. They remain silently settled in the thick
vegetation, mostly at the shaded areas of lianas which makes them very
difficult to spot due to their dark appearance.
They feed on the liana and other climbers throughout the day, as one can
see them excreting the excess water with regular jet spray. As the direction of sun changes from east to
west, the cicada also changes its resting position, however, there are areas
where the sunlight hardly reaches and often more than one individual settle
closely in these types of areas. The
males start tymbalizing from late-afternoon, starting from around 14.30h and
continues till about 18.00h. Initially
the males call from one spot, after repeating few set of calls they walk slowly
and change the position in the time between the calls. After repeating this a few times on the same
plant or tree, they fly and change the tree or liana and repeat the
process. They call almost in a
sub-gregarious manner as the afternoon progresses and call rigorously and
desperately as dusk approaches. Usually
the males call from a little higher parts of the vegetation whereas the females
prefer to settle 1.21–1.82 m from the ground on the climbers and lianas. Sometime, towards the evening, the males come
down and settle close to the ground or even fall on the ground close to the
plant where female is resting and announce their acoustic signals desperately. While calling, the raised abdomen of the
males, which is otherwise covered comes out in between two tegumina (Image 7E).
Acoustics: Image 7A representing temporal oscillogram of 68 seconds of
tymbalized calling re-transcribed in real time, showing two complete calling
sequence of this species. Each sequence
consist of two uneven phases, The initial short phase is designated as ph-1 and
prolonged phase designated as ph-2, as shown in Image 7A. Second phase consist of highly condensed
signals as shown in Image 7B, which shows the partial oscillogram of 10/100ths
of a second of the ph-2. Towards the end
of the prolonged second phase (as shown in Image 6) of the double motif at the
rate of three per hundredth of a second as shown in the Image 7B get a regular
interval (sandwiched between seven to eight crackling signals as shown in Image
7C) which is crescendo until the crackling signals reduced to four to five
(Image 7D). Image 6 showing partial
oscillogram stretching out in an arbitrary space-time unit showing the initial
first phase (ph-1) and prolong second phase (ph-2) along with the ending of
entire second phase. Sometime there is a
minor variation in first phase that occur in different tymbalized calling,
often of the same individual as shown in the Image 7F&G.
Proposed common name
Based on its appearance, this cicada can be called ‘Variable Dark
Balinta’.
Justification
In Latin, ‘tenibracosa’ means dark.
This cicada is darker than closely related species Balinta octonotata
in its general appearance by having three reduced pale spots on dark tegumina
and black abdomen. Colour variations have been reported as well for the females
of this species from Thailand such as some individuals having yellow abdomen
instead of complete black with only dorsal black spots along with individual colour
variations of hindwings (Boulard 2013).
Hence, it is justified to add ‘variable’ in common name to represent the
species better.
Orientopsaltria fangrayae Boulard, 2001
(Figure 2; Table 1; Images 9, 10, 11)
Genus Orientopsaltria Kato, 1944 consists of 33 species
distributed across the Philippines Borneo, Sumatra, Malayan Peninsula, and
Thailand (Duffels & Zaidi 2000; Boulard 2013; Sanborn 2014), with a recent
record from Vietnam (Pham et al. 2019).
The species under the genus Orientopsaltria are medium to fairly
large in size and very similar to the genus Cosmopsaltria Stål, 1866 or Dundubia
Amyot & Audinet-Serville, 1843; however, unlike Cosmopsaltria,
the genus Orientopsaltria have rounded pygoferal lobes and unlike
unicolour male opercula and globous head of Dundubia they have bi or
multi-coloured male opercula and head globous but not as much as Dundubia,
postclypeus fairly strongly produced (Duffels & Zaidi 2000; Boulard
2013). The latero-posterior ocelli
significantly closer to each other than from the corresponding eye; pronotum
marked with two black parasagittal lines and possibly two black sub marginal
bands; mesonotum, in most cases, heavily decorated with long black sagittal
stripe with four black fasciae, as well as two maculae in front of scutellum;
hyaline wing with only apical nervules highlighted or with transverse
nervulation lined with bistre or without any infuscations; subapical and
brownish spots often on the longitudinal nervules; hindwing with six apical cells;
male opercula elongated, wide with either single green ochre tint or broadly
greenish with black or bistre along internal margin and on apex (Kato 1944;
Boulard 2013). Orientopsaltria
fangrayae was first discovered from Chiang Mai Province (Boulard 2001,
2013). The species from India was first
identified based on the CIA provided in Cicadas of Thailand (Boulard 2013) and
later confirmed with acoustics, general morphology and the male genitalia which
is identical to the description given in the book (Boulard 2013).
Collected specimen
Specimen Code: VS-AA438,
10.ix.2017, 1 adult male. Only one
specimen was collected in 2017 from the upper hill slopes of Mawsinram Village
of Khasi Hills and the same specimen is presented in the paper.
Description
Head: Eyes rich chestnut brown in live specimen which appear reddish
from distance (Image 11) and turns dark brown in pinned specimen. Head green with heavy decoration. Supra-antennal plates black below and green
on the top which sometime looks darker in live insect. Both side of epicranium have rectangular
black spots and two traces of tiny spot posteriorly. Ocular tubercle including frons and
epicranial suture black which sometime continues as parasagittal lines of
pronotum in some individuals.
Postclypeus not protruded, base colour light sea green with green
coloured transverse grooves. A median
black line at the front of postclypeus narrow at the adjacent area of
anteclypeus and broadens as it goes towards the dorsal side and bifurcate which
dorsally forms two big spots at the dorsal part of the postclypeus. Dorsally, the area adjacent to pronotum,
behind the eyes have black elongated spot parallel to the border of the
head. The part of lorum adjacent to
anteclypeus have traces of black. Rostrum pale coloured with dark tip.
Thorax: Pronotum has a central greenish brown oblong spot, somewhat like
the shape of a squid, bordered by dark parasagittal lines which originate from
the back of the head and ends just above the pronotal collar. There is an
Inverted “L” shape spot attached to parasagittal lines diagonally. Dark paramedian fissure join this L-shaped
spot at the angle. Lateral fissure
dark. The pronotum collar has the thin
black margin in the inner part of the lateral margin which goes beyond lateral
fissure. Pronotum collar green with thin
black outer margin which crosses the pronotal collar just above the lateral
angle. Submedian sigilla black which is
incomplete at the median area but barely crosses parapsidal suture posteriorly
and enters at the central part of mesonotum. The base of the lateral sigilla
which is adjacent to pronotal collar black. The lateral fasciae run below this
basal dark area posteriorly along and within lateral sigilla. Scutal depression and surrounding area black,
giving an impression of oval spots to some extent. A pointed, spear-head shaped, oblong median
fascia runs from the posterior area between two submedian sigillas till above
the cruciform elevation. Cruciform
elevation uniformly brownish green.
Femur of foreleg sea green coloured, similar to that of the postclypeus,
with black joints and black edge with dark primary and secondary spines. The joint between femur and tibia in second
and third pair of legs are prominently yellow with black spots. Opercula long, reaches till seventh
sternite. The spoon shaped operculum is
hyper-developed and as mentioned by Boulard and shown in Image 8G & H,
strengthened laterally with a strong brilliant bistre helm, broadly separated from
base, occurring initially in a short patch and then in large ventro-lateral
spoon shapes (Boulard 2013). Less than
two third of the opercula from the base are green and smoky dark with white
overlaid scales towards the tip in live specimen. Wings entirely hyaline. Forewing have traces of pale brown
infuscation at radial and radiomedial crossvein. Veins at the base of the forewing are green
in live insect (Image 8E) which turns pale brown in pinned specimen (Image 8A).
Abdomen: Abdomen darker than the forebody. Sternites greenish-brown with darker margin
posteriorly and overlaid with pollinosity which appear as in continuity with
the tip of the opercula (Image 8G).
First tergite reduced. All
tergites are dark brown except second and third tergites which have prominent
median green patch and traces of median green patch on them, respectively. Timbal cover is brown and covers the timbal
completely from top and only opens laterally.
Third tergite has two dorsolateral silver spot, one at each side. This is due to heavy pollinosity caused by silver
overlaid hair like structure.
Male genitalia: The lateral lobe of the pygofer apically rounded without
protrusion. Basal pygofer lobes appear
as a distinct ridge with pointed apical protrusion. Uncus lobes look square like, with angular,
robust lateral spine with internal median groove. The apical part of lateral margin straight
and tapered.
Distribution
The species was first discovered in the wet mountain forest of Fang of
Chiang Mai Province and later reported from Wiang Papao, Khun Lao Mountain and
Doi Ang Kang in Thailand (Boulard 2001, 2003, 2005b, 2006b, 2007b, 2008, 2013;
Sanborn et al. 2007). We had first
recorded the species in East Khasi Hills in 2017, in the hilly surroundings of
Mawsinram Village and later in Mawphlang adjacent area. It has been recorded till Ladmawphlang but
not beyond Mawkdok Valley. In 2018, we
recorded the species only from the mid-elevation wet forests (up to 2000m) of
Moulin National Park in Upper Siang District, Arunachal Pradesh. In this case the species was observed and
recorded but could not be collected as they were settled high up in the trees.
Bionomics
Habitat type: The species was encountered between 890–1,400 m, mostly in
the thick forests of the hill slopes consisting predominantly of Prunus sp.,
Rhododendron sp., and Castanopsis sp. trees. The presented specimen was collected at
1,161m. As rightly mentioned by Boulard
(2013), they are ambrophilous, mostly prefer the wetter forests of the mid to
higher elevation. Towards the end of
their activity period a few desperate males wander off and can be found outside
their preferred habitat.
Annual appearance period of adults: The first Individual was encountered
on 28 August 2017 and the last individual was encountered in the second week of
November 2017. Their activity is at peak
from mid-September to third week of October.
Boulard recorded the species in September in the year 2000, 2004 and
2006 and in November in the year 2004 (Boulard 2013). They are active mostly in the day time.
Behaviour: The males settle at the ventral side of the upper branches of
tall trees of thick forest of the hill slopes, making them very difficult to
spot due to their decorative forebody matching with the thick mosses of tree
trunk. Usually they have been spotted
using headlight and binoculars as they prefer forests where light barely penetrates
but their red eyes give their position away in green mossy branches (Image
10). The males emit the acoustic signal
randomly without any particular gap in between.
Although Boulard (2013) described the species as heliophilous, in our
observation, we find them certainly dendrophilous. Boulard mentioned that males often exhibit
‘synchronous orchestra’ (Boulard 2013), however, we noticed this behaviour in
mostly prolonged rainy and extremely foggy days and occasionally during sunny
days. Gregarious by nature, males settle
in nearby trees and display this synchronous orchestra. They also often show this behaviour if a
pre-recorded call is played in a portable speaker but not necessarily
always. The males settle at one place
and tymbalize, often they do not change the place for several days, moving only
insignificantly from the settled area.
Acoustics: Calling tymbalization sounds like a scream which appear as
extremely dense signal of spindle in oscillogram without any detectable
structures (Image 10A). Image 10B
showing the sonogram stretching 25/100ths of a second representing
an arbitrary space-time unit to represent a magnified structural Image. Image 10C showing the synchronous orchestra
where every spindle is of +/-18seconds and the distance varies from 16.2 to
21.8 seconds.
Proposed common name
Based on its appearance and behaviour, the name proposed is ‘Red-eyed
Hill Screamer’.
Justification
The call of this species is spindle-shaped with thick signals that gives
an impression of screaming and this cicada prefers wet forests of the Hills
throughout its range hence the ‘Hill Screamer’.
The first striking feature that anyone would observe in this cicada when
they are alive is their red eyes (Image 11).
Table 1. Measurement of specimen.
|
Name of the body part |
Meimuna duffelsi VS-AA222 |
Dundubia annandalei VS-AA532 |
Balinta tenebricosa VS-AA268 |
Orientopsaltria fangrayae VS-AA438 |
1. |
Forewing |
39.24mm |
38.15mm |
26.95mm |
52.00mm |
2. |
Hindwing |
20.91mm |
20.92mm. |
14.51mm |
28.66mm |
3. |
Width of the head |
9.82mm |
10.17mm |
7.80mm |
14.46mm |
4. |
Length of the head |
2.53mm |
3.10mm |
1.94mm |
2.36mm |
5. |
Width of pronotum |
10.24mm |
11.07mm |
8.00mm |
15.13mm |
6. |
Length of pronotum |
3.59mm |
4.30mm |
2.92mm |
6.16 mm |
7. |
Width of mesonotum |
9.13mm |
9.26mm |
7.46mm |
12.97mm |
8. |
Length of mesonotum |
5.98mm |
5.49mm |
4.18mm |
8.06mm |
9. |
Length of metanotum |
1.31mm |
1.00mm |
1.33mm |
2.75mm |
10. |
Length of abdomen |
17.88mm |
14.55mm |
15.29mm |
21.29mm |
11. |
Length of Proboscis (length of rostrum including
labrum and mentum) |
6.61mm |
5.23mm |
4.99mm |
12.17mm |
For
figures & images - - click here
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