Showing posts with label Author: Chandramouli. Show all posts
Showing posts with label Author: Chandramouli. Show all posts

Sunday, July 10, 2016

[Herpetology • 2012] Coryphophylax brevicaudus • A New Species of Coryphophylax Fitzinger in: Steindachner, 1867 (Iguania: Agamidae) from the Andaman Islands, India




ABSTRACT 
The systematic position of the agamid genus Coryphophylax (Squamata: Agamidae) is given as monotypic and endemic to the Andaman and Nicobar Islands in the Bay of Bengal, India. After having surveyed intensively in thirteen different Islands and examined several individuals in the Andamans group of islands, we describe a second species of Coryphophylax from the lowland rainforests of the South Andaman Island. Coryphophylax brevicaudus sp. nov. is differentiated from its congener, C. subcristatus (Blyth, "1860" 1861) by its smaller size, relatively shorter tail, presence of nuchal and dorsal crests in both sexes, midbody scale row counts and colour pattern. The new species lives in sympatry with C. subcristatus. The taxonomic history and systematic status of the genus Coryphophylax are discussed, and the need for continued surveys in the Islands is emphasized.

Key words: Squamata, Iguania, Agamidae, Coryphophylax brevicaudus sp. nov., Andaman Islands, India




 Harikrishnan S., Karthikeyan Vasudevan, S.R. Chandramouli,  B.C. Choudhary, Sushil Kumar Dutta and Indraneil Das. 2012. A New Species of Coryphophylax Fitzinger in: Steindachner, 1867 (Sauria: Iguania: Agamidae) from the Andaman Islands, India.
Zootaxa. 3451:31-45.


[Herpetology • 2015] Taxonomic Reassessment of the Arboreal Toad Genus Pedostibes Günther 1876 (Anura: Bufonidae) and Some Allied Oriental Bufonid Genera


FIG. 3.— Dorsal aspect of the bodies of five species of arboreal toads collected from southern and Southeast Asia:
(A) holotype of Rentapia hosii BMNH 1947.2.19.29; (B) holotype of R. everetti BMNH 1947.2.18.27; (C) holotype of Rentapia rugosa (junior synonym of R. everetti) FMNH 81297; (D) a syntype of Pedostibes tuberculosus BMNH 1947.2.22.70; (E) a voucher specimen of Bufoides meghalayanus (WII uncatalogued); and (F) a syntype of Nectophryne kempi (ZSI 18481A).
In each panel, bar 5 5 mm. 
Chandramouli & Amarasinghe. 2016.  DOI 10.1655/HERPETOLOGICA-D-15-00053

Abstract
We reassessed the taxonomic status of an Asian genus of arboreal bufonids, Pedostibes, based on examination of preserved material of the two species currently attributed to this genus. Analysis of their morphological, morphometric, and geographic distribution data revealed that Pedostibes tuberculosus, the type species of this genus from the Western Ghats, southwestern India, is morphologically distinct from the geographically separated member, P. kempi, which is distributed in northeastern India. Hence, the generic nomen Pedostibes is restricted to the type species, rendering it a monotypic genus from the Western Ghats of peninsular India. A re-examination and detailed comparisons of the types of P. kempi with other bufonid genera revealed morphological similarities with another geographically proximate toad, Bufoides meghalayanus, from northeastern India. Hence, this taxon is formally transferred herein to Bufoides with a redescription. The composition of the recently described Southeast Asian toad genus Rentapia is reevaluated and the name-bearing type specimens of the currently ascribed taxa are redescribed. A detailed examination of the types of Rentapia everetti and R. rugosa revealed morphological congruence coupled with geographic sympatry. Hence, the latter nomen is synonymized with R. everetti in accordance with the International Code of Zoological Nomenclature principle of priority.

 Keywords: Arboreal anuran, Morphometric analyses, Northeastern India, Western Ghats




S.R. Chandramouli and A.A. Thasun Amarasinghe. 2016. Taxonomic Reassessment of the Arboreal Toad Genus Pedostibes Günther 1876 (Anura: Bufonidae) and Some Allied Oriental Bufonid Genera.
 Herpetologica. 72(2): 137-147.  DOI 10.1655/HERPETOLOGICA-D-15-00053

Sunday, July 3, 2016

[Herpetology • 2016] Taxonomy and Natural History of Eutropis beddomei (Jerdon, 1870) (Reptilia: Scincidae), including a Redescription of the Holotype


Euprepes beddomei 
(Jerdon, 1870)


Abstract

Euprepes beddomei was described by Jerdon (1870) from “Mysore” (Karnataka State, India). Simultaneously, Euprepes (Tiliqua) septemlineatus, which is morphologically similar to E. beddomei, was described by Blanford (1870) based on a single specimen collected from the Ganga River Valley, Southeast Berar, Madhya Pradesh, India. Smith (1935) synonymised the latter species (published in September, 1870) with Euprepes beddomei which in turn was published earlier (March, 1870). Jerdon’s publication should therefore be given priority. A comprehensive comparison between the holotypes of the above two species confirms that E. septemlineatus is a junior synonym of E. beddomei. Based on morphological characters, Eutropis beddomei is here clearly identified and can be considered a widespread species in India and Sri Lanka. The original description of E. beddomei is very short and lacks a description containing most of the important diagnostic characters; hence, we hereby provide a comprehensive description of the species based on the examination of its holotype.

Keywords: Reptilia, Biogeography, Euprepes, India, Mabuya, species complex, Sri Lanka, synonymy



A.A. Thasun Amarasinghe, Patrick D. Campbell, S. R. Chandramouli, Kaushik Deuti, Sujoy Raha, D.M.S. Suranjan Karunarathna and Ineich Ivan. 2016. Taxonomy and Natural History of Eutropis beddomei (Jerdon, 1870) (Reptilia: Scincidae), including a Redescription of the Holotype. Zootaxa. 4132(4); DOI: 10.11646/zootaxa.4132.4.3

Thursday, January 21, 2016

[Herpetology • 2016] Blythophryne beryet • A New Genus and Species of Arboreal Toad (Anura, Bufonidae) with Phytotelmonous Larvae, from the Andaman Islands, India


Andaman Bush Toad |  Blythophryne beryet
 Chandramouli, Vasudevan, Harikrishnan, Dutta, Janani, Sharma, Das & Aggarwal, 2016


Abstract
A new bufonid amphibian, belonging to a new monotypic genus, is described from the Andaman Islands, in the Bay of Bengal, Republic of India, based on unique external morphological and skeletal characters which are compared with those of known Oriental and other relevant bufonid genera. Blythophryne gen. n. is distinguished from other bufonid genera by its small adult size (mean SVL 24.02 mm), the presence of six presacral vertebrae, an absence of coccygeal expansions, presence of an elongated pair of parotoid glands, expanded discs at digit tips and phytotelmonous tadpoles that lack oral denticles. The taxonomic and phylogenetic position of the new taxon (that we named as Blythophryne beryet gen. et sp. n.) was ascertained by comparing its 12S and 16S partial genes with those of Oriental and other relevant bufonid lineages. Resulting molecular phylogeny supports the erection of a novel monotypic genus for this lineage from the Andaman Islands of India.

Keywords: Amphibian, bufonid, tadpole, rRNA, molecular phylogeny, skeletal characters




Figure 1. Morphological characters of the Blythophryne beryet gen. et sp. n.: a dorso-lateral view b dorsal view c ventral view d ventral view of left palm e ventral view of left foot of the adult female holotype (ZSI_A-12521) in life f adult female holotype in preservation g dorsal view of the male paratype (ZSI_A-12529) in life showing inverted-V shaped markings and the inter-ocular band on the dorsum.


Systematics

Blythophryne gen. n.
http://zoobank.org/2BAB0154-53B8-43E3-BB14-F36F12FDD8DE

Type species: Blythophryne beryet gen. et sp. n. by monotypy (Fig. 1, Table 4).

Etymology: The generic name is a patronym, coined in appreciation of Edward Blyth (1810–1873), the first curator of the Asiatic Society of Bengal, who initiated herpetological studies in the Andaman and Nicobar Islands, through his phenomenal, pioneering paper “Notes on the fauna of the Nicobar islands” (Blyth 1846). Das (1999) remarked, “Blyth is to be credited for the description of a large number of species from the Andaman and Nicobar Islands that are still valid. Blyth (1846) wrote the first account on the vertebrate fauna of these islands, and in 1863, compiled the first check-list”. Further details of Edward Blyth and his contributions to studies on Indian natural history are in Das (2004) and Sridharan (2013). The specific epithet ‘beryet’ (in Great Andamanese language; Andamanese.net) refers to ‘small frog’. We believe that the Great Andamanese knew of the existence of this small arboreal anuran that is here described as new species to science. We hope the name given here will also raise awareness about the dwindling, indigenous tribal populations in the Andamans, their culture and extinction of their tribal languages.

Vernacular name:Andaman Bush Toad’ is proposed as the common English name for this new species, indicating its arboreal habit and restricted distribution as understood currently.

Figure 5. a A live, uncollected specimen of Blythophryne beryet gen. et sp. n. showing milky white secretion from the parotoid gland b Amplecting pair (live, uncollected) of Blythophryne beryet gen. et sp. n. showing axillary amplexus.

Figure 6. a Eggs and hatchling tadpoles of Blythophryne beryet gen. et sp. n.  b, c endotrophic larvae of Blythophryne beryet gen. et sp. n. showing pale white abdominal yolk d Lateral view of a Stage 43 tadpole of Blythophryne beryet gen. et sp. n. e Oral disc of a Stage 35 larva of Blythophryne beryet gen. et sp. n., showing absence of keratodont and the presence of keratinised jaw sheaths f a metamorph of Blythophryne beryet gen. et sp. n. showing initiation of tail absorption.

Distribution: This species has been documented from five islands of the Andaman archipelago, namely, the South Andaman (Mt. Harriet), Rutland, Little Andaman, Havelock Island in the Ritchie’s Archipelago and North Andaman (Saddle Peak) (Fig. 4).

Figure 4. Map showing distribution of Blythophryne beryet gen. et sp. n. in the Andaman Islands, Bay of Bengal, India. Holotype collected from Mt Harriet (indicated with a red triangle).


S. R. Chandramouli, Karthikeyan Vasudevan, S Harikrishnan, Sushil Kumar Dutta, S Jegath Janani, Richa Sharma, Indraneil Das and Ramesh Aggarwal. 2016. A New Genus and Species of Arboreal Toad with Phytotelmonous Larvae, from the Andaman Islands, India (Lissamphibia, Anura, Bufonidae). ZooKeys. 555: 57-90. doi: 10.3897/zookeys.555.6522