New records of dragonflies and damselflies (Insecta: Odonata) from the
Western Ghats of Maharashtra, India
Pankaj Koparde 1, Prachi Mhaske 2 & Ankur
Patwardhan 3
1,2,3 Department of Biodiversity, MES’s Abasaheb
Garware College, Karve Road, Pune, Maharashtra 411004, India
1 pankajkoparde@gmail.com (corresponding author), 2 prachi.mhaske13@gmail.com 3 ankurpatwardhan@gmail.com
Abstract: Odonates were surveyed across 10
localities from Western Ghats of Maharashtra State, India during
2011–2013. We recorded 64
species belonging to 40 genera and 12 families. Seven species are new records for the
region, and four out of them are new records for Maharashtra State. In this paper, we discuss these species
records and their micro-habitats, and update previous
knowledge on distribution of odonates.
Keywords: Distribution, ecological indicator, micro-habitat, northern Western Ghats, Odonata.
doi: http://dx.doi.org/10.11609/JoTT.o3402.5744-54 | ZooBank: urn:lsid:zoobank.org:pub:6A4BE843-51F8-4E5A-A89F-07F9A13209B8
Editor: K.A.
Subramanian, Zoological Survey of India, Kolkata, India. Date of publication:26 May 2014 (online & print)
Manuscript details: Ms #
o3402 | Received 07 November 2012 | Final received 15 May 2014 | Finally
accepted 16 May 2014
Citation: Koparde, P., P. Mhaske & A. Patwardhan (2014).New records of
dragonflies and damselflies (Insecta: Odonata) from the Western Ghats of
Maharashtra, India. Journal of Threatened Taxa6(5): 5744–5754; http://dx.doi.org/10.11609/JoTT.o3402.5744-54
Copyright: © Koparde et al. 2014. Creative
Commons Attribution 4.0 International License. JoTT allows unrestricted
use of this article in any medium, reproduction and distribution by providing
adequate credit to the authors and the source of publication.
Funding: Indian Space Research
Organization under ISRO-UoP interaction program (2011-2013).
Competing Interest: The
authors declare no competing interests.
Acknowledgements: The present study
was supported under the ISRO–UoP initiative. We thank Dr. M.C. Uttam,
Director, ISRO-UoP for his encouragement and Dr. K.A.
Subramanian, ZSI-Kolkata who was always helpful in confirming the
identification of the specimens. We
also thank the Principle Chief Conservator of Forests (Territorial and Wildlife
wing), Maharashtra. Personal thanks are also due to Mr. Mohan Karnat, CF (WL),
Kolhapur, Mr. Zure (ACF, Chandoli NP), Mr. Mane (RFO, Chandoli NP), and Mr.
Nikam (RFO, Patan) and other ground level forest department staff for their
help. We also thank the Principal, Abasaheb Garware College, Pune, for his
support. Field level support and assistance from Ms. Apoorva Sahastrabuddhe,
Mr. Rakesh Deulkar, Mr. Abhishek Narvekar, Ms. Priti Bangal, Ms. Monali Mhaskar,
Ms. Prajakta Pathare, Mrs. Medhavi Tadwalkar-Rajwade, Ms. Amruta Joglekar is
gratefully acknowledged. We also thank the anonymous referees for their
critical comments.
For figures, images, tables -- click here
Odonates (dragonflies and damselflies) are freshwater insects, often
used as indicator taxa in biodiversity studies (Subramanian 2005; Córdoba-Aguilar 2008;
Subramanian et al. 2008). Records
of these insects on a spatiotemporal scale are useful to understand micro-habitat quality and/or land-use change. Although it is relatively difficult to
identify odonates on field, availability of photographic field-guides
(Emiliyamma et al. 2005; Subramanian 2005; Andrew et al. 2008; Nair 2011; Kiran
& Raju 2013), web-portals (Asia Dragonfly 2014), blogs and forums
(DragonflyIndia 2014) have made it an easier task. As a consequence, more and more people
are now getting interested in recording species from different regions across
India.
Western Ghats of India and
Sri Lanka, one of the global biodiversity hotspots (Myers et al. 2000), are
known to support number of Odonata species. Around 174 species have been
recorded from Western Ghats of India alone, comprising 56 endemics to the
region (Subramanian et al. 2011). Although Odonata fauna of Western Ghats is well-documented (Fraser 1924,
1932, 1933, 1934, 1936; Emiliyamma & Radhakrishnan 2000, 2002;
Radhakrishnan & Emiliyamma 2003; Emiliyamma 2005; Subramanian &
Sivaramkrishan 2005; Subramanian 2007; Rangnekar et al. 2010; Subramanian et
al. 2011; Emiliyamma et al. 2012; Das et al. 2013; Emiliyamma et al. 2013;
Kulkarni & Subramanian 2013; Subramanian et al. 2013; Rangnekar & Naik
2014), certain parts are still under-explored. The northern Western Ghats (Gujarat,
Maharashtra, Goa, and northwestern Karnataka) are one
of the under-explored areas in terms of documentation of Odonata fauna. These areas are
characterized by highly fragmented forest cover. Most of the Western Ghats endemic
odonates are known to be associated with closed forested areas with streams
(Subramanian et al. 2011). Such
habitats are often good quality forested areas. Therefore, documenting fauna from
such regions is highly important as it helps fill the knowledge gap about
distribution of species, which may have conservation implications. Odonata fauna of northwestern Karnataka
and Goa is relatively well-explored (Prasad 1995;
Subramanian 2007; Kulkarni & Talmale 2008; Subramanian et al. 2008; Yadav
et al. 2008; Rangnekar et al. 2010; Subramanian et al. 2013; Rangnekar &
Naik 2014) as compared to Maharashtra and Gujarat; however the region still
lacks considerable data on spatial distribution and diversity of odonates. As per Kulkarni et al. (2012), 101
Odonata species have been reported from Maharashtra; however, very few studies
have looked into Odonata fauna of Western Ghats of Maharashtra (WGM) (Fraser
1924, 1933, 1934, 1936; Aland et al. 2012; Sathe & Bhusnar 2010; Kulkarni
& Subramanian 2013). According to Fraser (1924, 1933, 1934, 1936);
Subramanian (2005); Rangnekar et al. (2010) and Rangnekar & Naik (2014);
northern distributional limit of many Western Ghats endemic species has been
reported to be either south-west Maharashtra or northern
Goa. However this is most probably
an artefact of sampling. To explore
possibility of finding endemic species of conservation concern in southwestern
and centralwestern Maharashtra, we carried out a survey of odonates. This paper updates knowledge on the
distribution of odonates, partially documents morphological data, and comments
on spatial distribution of the species and threats associated with them.
Materials and Methods
Study area: The study area falls in
central-west and south-west Maharashtra. The study area includes Sahyadri Tiger
Reserve (STR), a recently declared tiger reserve which lies between
17.33’–17.83’N & 73.58’–73.875’E, Amboli (15.964722’N &
74.003567’E, 787m), Parpoli (15.950389’N & 73.958056’E, 130m) and Verle
(15.987639’N & 73.970472’E, 754m) villages. The crow-flight distance between STR and
localities in and around Amboli is around 128km (Google Inc. 2013). STR lies in centralwestern Maharashtra; whereas Amboli, Parpoli and Verle are from southwestern
Maharashtra. Administrative boundary of STR is spread across Satara, Sangli,
Kolhapur and Ratnagiri districts, and comprises of Koyna Wildlife Sanctuary
(Koyna WS), Chandoli National Park (Chandoli NP) and corridor joining both
these protected areas. Amboli,
Parpoli and Verle villages are a part of Sindhudurg District of
Maharashtra. The landscape of STR
is patchy in terms of forest cover and mainly consists of moist-deciduous to
evergreen forests. Six localities
from STR, one from Koyna WS and corridor area each and four from Chandoli NP
were studied during the survey (Fig. 1). The landscape of Amboli, Parpoli and Verle villages is mainly composed
of semi-evergreen forests. A number
of perennial streams flow across these villages passing through a variety of
land-use, offering ideal habitats for odonates. The temperature range of the study area
is between 13–35 0C. The study area experiences three distinct
seasons—summer (February–June), monsoon (July–August), winter (September–January). Hiranyekeshi River in Amboli, two streams
in Parpoli Village of which one flows across agricultural land (Parpoli 1) and
the other across moist deciduous forest (Parpoli 2), and an open stream that
flows nearby Verle Village (Fig. 1) were surveyed.
Data collection: Odonates
were recorded opportunistically during October 2011 to April 2013. Species were recorded during random
walks along streams, and shores of water-reservoirs and rivers between
0800–1300hr. Sampling was
carried out throughout the year, except during monsoon. A 8x40
binocular was used to observe the insects. Individual records were geo-referenced using a Garmin GPS Map 60. Odonates were identified using field
guides (Subramanian 2005; Nair 2011) and taxonomy monographs (Fraser 1933,
1934, 1936). Web-forums
(Asia-dragonfly 2014; Dragonflyindia 2014) were accessed for finding spatial
data in public domain. Scientific names and authorities follow Subramanian
(2009). For records from
Maharashtra, Fraser (1924, 1932) and reviews by Tiple (2012) and Kulkarni et
al. (2012) were consulted. Photographs of wing venation and anal appendages were taken for
specimens, which were difficult to identify on field. No specimens were collected except for
two species, viz., Protosticta hearseyi Fraser, 1922 (single male) and
Coorg Bambootail Caconeura ramburi Fraser, 1922 (single female). Both the specimens were hand-picked and dry preserved to confirm the identification
by using stereoscopy. The specimens
were sent to Zoological Survey of India, Calcutta for identification
confirmation. Measurements were
taken using a digital vernier calliper.
Results
1. Odonata fauna of the study area: Sixty-four species belonging
to 40 genera, spread across 12 families were recorded
during the survey (Annexure 1). Sub-order Anisoptera was represented by 38 species, and 26 species
represented sub-order Zygoptera. Libellulidae was the best represented family
followed by Coenagrionidae and Aeshnidae. The list contains seven new spatial records for WGM, which include four
Zygopteran members, viz., P. hearseyi, C. ramburi, Malabar
Torrent-Dart Euphaea fraseri (Laidlaw, 1920) and Yellow-striped
Blue-Dart Pseudagrion indicum Fraser, 1924, and three Anisopteran
members, viz., Blue Hawklet Hylaeothemis indica Fraser, 1943, Nilgiri ClawtailOnychogomphus nilgiriensis Fraser, 1922 and Indian Lyretail Heliogomphus
promelas (Selys, 1873). Out of
these seven, four species are new records for Maharashtra State. The list
contains two Near Threatened species, viz., Heliogomphus promelas and Blue
Ground-Skimmer Indothemis carnatica (Fabricius, 1798).
2. Field notes on new species records:
i. Protosticta hearseyi Fraser, 1922
(Platystictidae): Eight individuals were sighted on a belt-transect of 500x10 m
in moist-deciduous forest of Bahe Village (Table 1, Fig. 1 and Image 1A). All eight individuals were observed to
be perched on dry twigs or flying weakly 1–2 m above ground when
disturbed. Eye coloration was blue
above and pale blue below separated by horizontal thick brown ring. Pterostigma
was dark brown. The collected male
specimen showed 17 post-nodal nervures in fore-wingsand 15 in hind-wings. Segment (S)
eight of abdomen was turquoise blue with a dorsal black stripe dividing the
blue patch. Anal appendages were
dark brown. Superior anal
appendages were typical ‘finger-thumb’ shaped.
ii. Caconeura ramburi (Fraser, 1922)
(Platycnemididae): A single female specimen was sighted at Chandel and Rundiv
forest-beats each (Table 1, Fig. 1, Image 1B). Both individuals were slow moving. In another instance, five individuals,
including three males, were recorded on a 500x10 m belt-transect laid in
moist-deciduous forest of Bahe Village (Table 1, Image 1C). Eyes of male specimens were azure blue
with a black cap. Abdominal
segments were black marked with blue basal rings except for S1, S8 and S9 which were prominently azure blue. Thorax of collected female specimen was
greenish yellow marked with black stripes dorsally and laterally, and yellow
ventrally. Eyes were dark brown
above and greenish laterally and ventrally. The female specimen showed 16–19
post-nodal nervures in fore-wings and 17–20
post-nodal nervures in hind-wings.
iii. Euphaea fraseri (Laidlaw,
1920) (Euphaeidae): One male and two females were sighted at Chandel
forest-beat on a 500x10 m transect (Table 1, Images 1 D,E). All the insects were basking in the
sunlight and occasionally darting to catch prey. Male was bright red colored with black
patches at the tips of hind wings covering around one fourth area of
hind-wings. Eyes were dark brown
dorsally and laterally, fading to grey ventrally. The abdomen was bright red except
S7–S10 which were black. The females were yellow, with black
dorsal streaking on abdomen. S7–S10 were dark brown to black as compared to rest of the segments. Eyes were dark brown above, grey
below. Thorax was yellow with black
stripes. A single female was
sighted at Tanali forest-beat on a 120x10 m transect. The species was also sighted at Amboli,
Parpoli and Verle (Table 1). Stream
2 of Parpoli Village showed dense population of the species. Seventeen individuals including sixteen
males and one female were recorded on a 50x10 m transect. A male that was hand-pickedshowed 17 ante-nodal nervures in fore-wings and 29–33 post-nodal nervures
in fore-wings.
iv. Pseudagrion indicum Fraser, 1924
(Coenagrionidae): Two male specimens, two mating pairs and a female specimen
were sighted at Amboli and Verle respectively (Table 1, Image 1F). The species was also sighted at Vakoli
and Kalambe villages. The male
specimen was black in color marked with blue. Eyes were with a dark brown cap,
greenish laterally and ventrally. Thorax was blue marked with greenish-yellow dorsal thoracic
stripes. Abdomen was dorsally matt
black. S8 and S9 were blue marked
with black apical ring.
v. Hylaeothemis indica Fraser, 1946 (Libellulidae):
A male specimen was sighted in moist-deciduous forest of Bahe (Table 1, Image
1G). The insect was perching on dry
twigs and flying over and around a stream. The insect was black marked with blue. Blue mid-dorsal thoracic stripes, blue
eyes, black legs, and blue stripes on black abdomen were few of the field characters which the insect showed.
vi. Onychogomphus
nilgiriensis (Fraser, 1922) (Gomphidae): A single male specimen was sighted at
Parpoli and Verle respectively (Table 1, Image 1 H,I). The insect was found to be perching on
rocks and foraging over and around the stream. Greenish-blue eyes, black abdomen marked
with yellow, claw shaped anal appendages, black legs, and characteristic
thoracic markings were primary determinants of the species level
identification.
vii. Heliogomphus promelas(Selys,
1873) (Gomphidae): A single male specimen was sighted in
moist-deciduous forest of Bahe (Table 1, Images 1 J,K). The insect was foraging over and around
a stream and occasionally perching on twigs. The insect was black marked with
yellow. The S7 was with a broad
basal yellow ring, covering approximately one third of the segment (Image 1K),
which is the key to the species. This character separates it from H. kalarensis, another Western
Ghat endemic belonging to the same genus. All abdominal segments were black in color marked with yellow basal
rings except for S8–S10. Eyes
were bottle green in color. Frons
was marked with a pale yellow horizontal stripe (Image 1J). Superior anal appendages were pale
yellow and of diagnostic lyre shaped.
Discussion and Conclusions
The present study recorded 64
species from WGM covering around 62% of Odonata fauna of the state (Tiple 2012;
Kulkarni et al. 2012), and adding four species to the checklist of the
state. The study does not
necessarily provide a checklist of the region as the sampling was opportunistic
and does not adequately cover the seasonal and climatic variation shown by
species assemblages. However,
during this preliminary survey, we encountered new distributional records for
seven Odonata species, out of which four species are new records for
Maharashtra State. Four species out
of these seven are Data Deficient (IUCN 2014). The prime reason behind this
categorization is lack of recent information. This may be due to inadequate or lack of
sampling by experts in regions (IUCN 2014), where these species are endemic. Moreover, relatively low number of
scientific studies exploring Odonata fauna of northern Western Ghats of India
might have created knowledge gap in our understanding of geographical
distribution of these species.
Members of Platystictidae,
Platycnemididae and Euphaeidae are restricted to closed canopy forested
streams, streams with dense riparian vegetation, and/or forested landscape
(Subramanian 2005; Subramanian et al. 2008). More than 70% species belonging to these
families that occur in India are endemic to Western Ghats (Subramanian 2007). P.hearseyi, a Western Ghats endemic species
(Subramanian 2007), is known from Nilgiri, Annamalai and Travancore (Fraser
1933); Kerala (Emiliyamma et al. 2005); southwestern region of Karnataka
(Subramanian et al. 2008) and Goa (Rangnekar et al. 2010). According to Tiple (2012), Protosticta
gravely Laidlaw, 1915 which represents Protosticta genus has been
recorded from Maharashtra, but not P. hearseyi. Our sighting location falls
approximately 195km (Google Inc. 2013) north from hitherto known northern most
sighting location by Rangnekar et al. (2010). The measured abdominal size of the P.
hearseyi male specimen (Table 2) was more than the one (30–35 mm)
given by Fraser (1933). The
post-nodal index provided by Fraser (1933) was smaller than the observed. This might be due to individual
variation, and instrumental measurement variation or accuracy differences. According to Subramanian (2007), C.
ramburi is a Western Ghats endemic species. The species is known from Western Ghats
south of Uttarakannada District of Karnataka (Subramanian 2005), Goa (Rangnekar
& Naik 2014), and from some parts of Eastern Ghats (Nair 2011, Das et al.
2012). The species has been
recently recorded from Pench National Park and Achanakmar-Amarkantak Biosphere
Reserve of Madhya-Pradesh (Tiple & Chandra 2013) and from Vidarbha region
of Maharashtra i.e., north-east Maharashtra (Tiple et al. 2013). Given recent records of the species on a
wider scale, it can be said that the species may not be a Western Ghats
endemic; but a wide-spread and under-explored species.E. fraseri is endemic to Western Ghats
(Kakkasery 2011a). The northernmost
records of the species in the Western Ghats include Savri Waterfalls,
Dudhsagar, Paytale, Sada, Cotigao and Derode localities of Goa (Rangnekar et
al. 2010); Kali River, Uttarakannada, Karnataka (Yadav et al. 2008);
southwestern Karnataka (Subramanian et al. 2008). There are formal records of E.
fraseri from Phansad WS, Raigad, Maharashtra (DragonflyIndia 2013; K.A.
Subramanian 2013 pers. comm.) which is further north
to STR. Given this potential
distribution, it can be speculated that E. fraseri might be continuously
distributed across WGM, perhaps till northern tip of WGM. P. indicum, a species endemic to Western Ghats (Subramanian
2005, 2007), is known from Nilgiris, Tamil Nadu; Kodagu and Chikmagalur,
Karnataka (Subramanian 2005) and Darode locality of Goa (Rangnekar et al.
2010). Kulkarni & Subramanian
(2013) quote the species’ presence at Tamhini Ghat, Pune, Maharashtra based on
a single specimen. The species has
also been recorded from eastern region of Bangladesh (Chowdhury & Mohiuddin
2011). The record from Bangladesh
is doubtful as the species was seen only once during 1994–2000 and it
might be a wrong taxonomic identification. This suggests that rigorous sampling is needed to delimit distributional
ranges of species, especially if they are endemic to a specific area or region.
Libellulidae and Gomphidae
are well-distributed Anisopteran members across Indian subcontinent, with few
species restricted to Western Ghats and/or north-eastIndia (Fraser 1934, 1936; Subramanian 2005). Two species belonging to Libellulidae
and eighteen species belonging to Gomphidae are known to be endemic to Western
Ghats (Subramanian 2007). Many
researchers have quoted Hylaeothemis indica as Fruhstorfer’s
Junglewatcher Hylaeothemis fruhstorferi Karsch (1889), creating
confusion in distributional records. The former species is known to occur in India (Dow 2009a), whereas the
latter one is found in Sri Lanka (Dow 2009b). H. indicais widespread across Indian subcontinent (Dow 2009a). It is known from the Western Ghats
(Subramanian 2005); Nilgiri Hills, Wynaad, Annaimallai Hills, Coorg and
Travancore (Fraser 1946); Ujani Wetland Reserve, Maharashtra (Kulkarni
& Prasad 2002); Kolhapur district, Maharashtra (Sathe & Bhusnar 2010);
Sada and Paytale, Goa (Rangnekar et al. 2010); and Arunachal Pradesh (Lahiri
1985). H. indicais known to breed in the seepages from marshes along the banks of mountain
streams at altitude above 610m (Fraser 1936). Record by Kulkarni & Prasad (2002)
from Ujani wetland might be doubtful given the habitat requirements of the
species. Lahiri (1985) record might
most probably be H. gardeneriwhich is known from Himalaya (Fraser 1936), and Uttaranchal
and Arunachal Pradesh (Subramanian & Dow 2010). O. nilgiriensisis a Western Ghats endemic species (Subramanian 2007) and is known only from
southern Western Ghats, the northern-most range being Dharmastala,
Dakshinkannada, Karnataka (Subramanian 2005, 2011). Although the known flight season of the
species is April–June (Subramanian 2009), we recorded the species in the
month of October, which may be due to bioclimatic variations. H. promelas, a Near Threatened species (Kakkasery 2011b), is known from Tamil Nadu,
Kerala and Karnataka (Fraser 1934), Goa (Rangnekar et al. 2010) and Orissa
(Nair 2011). The categorization of
the species under threatened category is due to the fact that the species is
rare and known from eight locations across Western Ghats till date, only three
of them being the recent records (Kakkasery 2011b). According to Nair 2011, the
peak flight period of the species is known to be only four months in monsoon
(May–June and August–September). The generally mountainous, undulating
terrain of Western Ghats becomes unapproachable during these months, limiting
the sampling. This might be one of
the reasons behind lack of knowledge on distribution of the species.
All the new records of
species were found associated with closed forested streams. Within a larger landscape, stream
connectivity generally allows dispersal of odonates, spreading them across the
landscape. Habitat fragmentation,
water pollution and diversion of water can be seen as main causal agents
restricting the movement of Odonata larvae, delimiting the distribution of
adults. A review by Subramanian et
al. (2011) points agricultural pollution and urban and industrial development
as major threats to Odonata fauna of Western Ghats. As northern Western Ghats are already
highly patchy in terms of forest cover, further fragmentation is harmful for
Odonata population to survive. This
calls for conservation of closed forested streams and micro-habitatssupporting such systems. All four
new records for Maharashtra, has already been recorded from Goa (Rangnekar et
al. 2010; Rangnekar & Naik 2014) suggesting that the current species
distribution knowledge is restricted because of lack of surveys in WGM. Amboli, which is at the southern tip of
Maharashtra and in continuity with forests of Goa is supposed to have similar
species composition as that of Goa. However, we recorded only E. Fraseri and O. nilgiriensisat Amboli. It is highly likely thatP. hearseyi and H. promelas as well as other endemic species
recorded from Goa might be present at Amboli, which we failed to detect due to
opportunistic sampling. Current
tourism pressure on closed forested streams of Amboli and nearby areas is high
and can be detrimental to habitat sensitive species. Closed forested localities
of STR are hotspots for endemic Odonata fauna. H. promelas,C. ramburi. P. hearseyi were observed at Bahe locality that lies in
corridor zone of STR, joining Koyna WS and Chandoli NP. The forests at Bahe village and nearby areas which are listed in buffer area of STR, are under high
pressure of forest felling due to anthropogenic pressure. E. fraseri,C. ramburi, P. indicum were observed in Amboli and STR,
suggesting that closed forested areas with streams between STR and Amboli, such
as Radhanagari WS and reserved forests in Sahyadri-Konkan corridor might be
supporting these species. The
published and informal records of E. fraseri across WGM suggest that the
species might be present in forests of Mahabaleshwar and Tamhini, which also
have semi-evergreen and evergreen forest patches remaining. Having said this, data obtained
systematically on micro-habitat correlates, species
assemblages and occupancy of climatic space by them may provide much more
realistic insights into distribution of these species.
More number of systematic
studies in north-west and central-west Maharashtra and
in Western Ghats of Gujarat are likely to shed light on actual distribution of
Western Ghats endemic odonates. The
species records presented in this paper suggest that even opportunistic records
of crepuscular and enigmatic species are useful in understanding distributional
ranges, potential areas of species’ presence, and species’ biology in general,
especially when the species recorded are underexplored.
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