New site record of Ichthyophis kodaguensis Wilkinson
et al., 2007 (Amphibia: Ichthyophiidae) in the
Western Ghats, India
Gopalakrishna Bhatta 1, K.P. Dinesh 2, P.
Prashanth 3 & R. Srinivasa 4
1 Department of Biology, BASE Educational
Services Pvt. Ltd, Basavanagudi, Bangaluru, Karnataka 560004, India
2 Western Ghats Regional Centre,
Zoological Survey of India, Calicut, Kerala 673006, India
3 Agumbe Rainforest Research Station,
Agumbe, Karnataka 577411, India
4 Alva’s Pre-University College,
Moodabidri, Karnataka 575002, India
Email: 1 gkbmanipura@gmail.com (corresponding author),2 dineshcafe@gmail.com, 3 prashanth.arrs@gmail.com, 4 srinivaszoology@gmail.com
Date of publication (online): 26 September 2011
Date of publication (print): 26
September 2011
ISSN 0974-7907 (online) | 0974-7893
(print)
Editor: K.V. Gururaja
Manuscript details:
Ms # o2729
Received 17 March 2011
Final received 21 July 2011
Finally accepted 05 September 2011
Citation: Bhatta, G., K.P. Dinesh, P. Prashanth
& R. Srinivasa (2011). New site record of Ichthyophis kodaguensis Wilkinson et al., 2007 (Amphibia:
Ichthyophiidae) in the Western Ghats, India. Journal of Threatened Taxa3(9): 2104–2107.
Copyright: © Gopalakrishna Bhatta, K.P. Dinesh, P.
Prashanth & R. Srinivasa 2011. Creative Commons Attribution 3.0 Unported
License. JoTT allows unrestricted use of this article in any medium for
non-profit purposes, reproduction and distribution by providing adequate credit
to the authors and the source of publication.
Acknowledgements: GB is grateful to the Directors, BASE, Bengaluru for
their unstinting support. DKP is thankful to the Officer-in-Charge, ZSI,
Kozhikode for encouragement and PP to the Director, ARRS, Agumbe, for the
encouragement. We are highly indebted to Manipal University, Manipal for the
technical support.
For figure, image, table --
click here
The
Caecilian amphibian Ichthyophis kodaguensis was recently described by
Wilkinson, Gower, Govindappa and Venkatachalaiah (2007) on the
basis of seven specimens in the collection of the Bombay Natural History
Society (BNHS), Mumbai. Out of
seven, six of the type specimens were collected from Venkidds Valley Estate
(12.261930N & 75.6892460E), Kodagu, Karnataka State,
India in 2002 and for the other type material the collection locality is not
precise, but mentioned was the Western Ghats region of Karnataka and Kerala between
2001 and 2003 (Wilkinson et al. 2007). Based on a single collection of I. kodaguensis in 2006 February Molur & Molur (2011)
reported this species from Rainforest Retreat, Coorg, which is 30km north of
type locality. The description of I. kodaguensis increased the striped species of Ichthyophis in the Western Ghats to four in number
with I. beddomei (Peters), I. tricolor (Annandale) and I. longicephalus (Pillai) being the others. Availability of specimens in the museum
for the study of caecilians is always challenging for the researchers (Gower et
al. 2011). All the striped forms
of Ichthyophis available in the Western Ghats are known
by a good number of specimens except for I. longicephalus which has only two specimens
in the museum and that too in a poor state of preservation (Pillai &
Ravichandran 2005; Wilkinson et al. 2007).
For
any further taxonomic and distributional details of these striped forms of Ichthyophis we suggest to refer to Bhatta (1998),
Pillai & Ravichandran (2005) and Wilkinson et al. (2007). Against this backdrop a new report of
the described species from new geographical locations adds more into the
extended precise range and gives a better understanding of metric and meristic
variability within the species.
On
18 June 2006, during the search for the secretive limbless amphibians on a good
rainy day in the abandoned mixed orchard, predominantly with coffee plantations
at Basarekattae (13.346020N & 75.3560920E) (Fig. 1), Koppa Taluk, Chickmagalur
District, Karnataka State, we encountered three egg clutches of which one was
with a striped mother. In the
nearby area we got two more striped forms which were identified as Ichthyophis beddomei and one individual of Gegeneophis carnosus. The external appearance and the colour pattern of the caring parent
superficially resembled I. beddomei but with traceable differences.
We
made further samplings on 25th June 2006, a rainy day, for detailed
studies from the adjacent coffee plantation which was 200m from our earlier
study site. During this search we
encountered four Gegeneophis carnosus, one striped form of Ichthyophis and an egg clutch without a caring
parent. The striped form of Ichthyophis was collected for further studies.
Both
collection habitats were from less attended coffee plantations with good canopy
and perennial source of water with humus rich black soil supporting a good
earthworm population.
Meristic
and metric data of the two above specimens collected did not fit into the key
provided by Pillai & Ravichandran (2005); but matched the recent key
provided by Wilkinson et al. (2007) for I. kodaguensis (Image 1). Hence we confirmed the identity as I. kodaguensis, with the following diagnostic characters
of Wilkinson et al. (2007); an Ichthyophis having a total length ranging from 232 to
265 mm (Table 1), with narrow lateral yellow stripes extending from close to
eye to level of vent, broken across collars, weakly indicated on lower jaw;
body uniformly dark chestnut brown above and paler lilac grey-brown below; body
sub-cylindrical, dorsolaterally compressed, tapering towards the vent with a
small terminal cap; sub terminal snout projecting slightly beyond the mouth;
eyes surrounded by a narrow whitish rim; tentacular aperture close to eye
(1.6–2.0 mm) than naris (2.8–3.0 mm), visible dorsally and more
clear in lateral view; teeth small, bicuspid with strongly recurved apices and
the dentaries are slightly larger than others; annular counts range 307 and
309; in life dorsally uniform dark chestnut brown, snout anterior to eyes are
slightly paler in colour (Image 1), ventrally fleshy brown, in lateral position
narrow longitudinal stripes of metallic yellow with irregular wavy margins,
width of the stripe narrow down both anteriorly towards head and posteriorly at
the vent; anteriorly yellow lateral stripe appears as a distinct spot on the
first collar and latter tapers along the upper jaw fading out at the level of
eye, but weakly indicated in the lower jaw merging with the whitish lip border;
posteriorly, stripes terminate quite abruptly on anterior margin of first
complete annulus anterior to vent.
The
morphological and morphometric data provided from the new locality for I. kodaguensis adds more into the variability in
meristic and metric data within the species. Wilkinson et al. (2007) collected several specimens of the
species from an agricultural habitat in a single day; Molur & Molur (2011)
reported this species from organic cardamom and coffee plantations in Coorg;
notably for our collection habitat preference was in areca orchard/coffee
plantations, which further aid in understanding the biology of the species.
Also our observation for I. kodaguensis extends the range of distribution to
about 125km aerially north of type locality without much difference in
elevation. The materials studied
are deposited in the collection of the Zoological Survey of India, WGRC,
Kozhikode.
References
Bhatta, G. (1998). A field guide to caecilians of the
Western Ghats, India. Journal of Biosciences 23(1): 73–85.
Gower, D.J., D.S. Mauroa, V. Giri, G.
Bhatta, V. Govindappa, R. Kotharambath, O.V. Oommen, F.A. Fatiha, J.A.
Mackenzie-Doddsa, R.A. Nussbaumf, S.D. Biju, Y.S. Shoucheh & M. Wilkinsona
(2011). Molecular
systematics of caeciliid caecilians (Amphibia: Gymnophiona) of the Western
Ghats, India. Molecular Phylogenetics and Evolution 59(2011):
698–707
Molur, S.
& P. Molur (2011). A new record of Ichthyophis kodaguensis. Frog leg 16: 21–23.
Pillai, R.S. & M.S. Ravichandran
(2005).Gymnophiona (Amphibia) of India, A taxonomic study. Records of the Zoological Survey of India, Occasional Paper 172: 1–26.
Wilkinson, M., D.J.
Gower, V. Govindappa & G. Venkatachalaiah (2007). A new species of Ichthyophis (Amphibia:
Gymnophiona: Ichthyophiidae) from Karnataka, India. Herpetologica 63(4): 511–518.