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2.
Toxicon ; 229: 107147, 2023 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-37127123

RESUMO

India is home to a diverse spectrum of medically-significant snakes accounting for one of the world's largest burdens of envenoming, morbidity and mortality. Indian polyspecific antivenom is derived from the venom of four snake species (Daboia russelii, Echis carinatus, Naja naja and Bungarus caeruleus), considered to be responsible for the majority of snakebite morbidity and mortality in India. The treatment of envenoming from other less-commonly encountered venomous snake species can be challenging. In this report, we describe the case of a 32-year-old male who presented with local swelling and coagulopathy following a bite from Ovophis monitcola (mountain pit-viper) in Nagaland, Northeast India. Local and systemic envenoming, failed to respond to Indian polyspecific antivenom and venom-induced consumption coagulopathy, confirmed by bedside and laboratory-based clotting assays, persisted for more than three weeks. Remote consultation with a national-level Poison Control Centre helped establish the responsible snake species and guide appropriate medical management.


Assuntos
Transtornos da Coagulação Sanguínea , Crotalinae , Mordeduras de Serpentes , Masculino , Animais , Antivenenos/uso terapêutico , Antivenenos/farmacologia , Mordeduras de Serpentes/tratamento farmacológico , Serpentes , Índia , Transtornos da Coagulação Sanguínea/induzido quimicamente , Venenos de Víboras/toxicidade
4.
Zootaxa ; 5175(3): 343-366, 2022 Aug 17.
Artigo em Inglês | MEDLINE | ID: mdl-36095361

RESUMO

We revisit the identities of Trimeresurus albolabris records from India and Nepal, based on a re-examination of historically mentioned specimens. Based on morphological congruence, we identify an old specimen originally labeled as T. albolabris from Nagpur, Central Province as Trimeresurus salazar. We also provide new records of T. salazar based on molecular data from newly collected specimens in Central India. As the range of T. salazar is now known to approach that of its sister species Trimeresurus septentrionalis, we also redescribe T. septentrionalis based on the holotype and referred material. Finally, we examined two historical specimens from Madras collected during the Novara Expedition, which we identify as T. davidi, leading to a reassessment of their origin. Consequently, we remove T. albolabris from the list of Indian snake fauna.


Assuntos
Trimeresurus , Viperidae , Animais , Índia
5.
Zootaxa ; 5129(2): 227-249, 2022 Apr 27.
Artigo em Inglês | MEDLINE | ID: mdl-36101139

RESUMO

The gekkonid diversity of the under-explored dry zones in Peninsular India is not yet completely inventoried, as evidenced by frequent new species descriptions. Here, we describe two new species of Hemidactylus from the dry rocky zones of Deccan Plateau viz. Hemidactylus mahonyi sp. nov. from Sandur Hills and Hemidactylus srikanthani sp. nov. from Devarayana Durga Hills, Karnataka State of Peninsular India. The new species belong to the morphologically cryptic H. murrayi Clade but differ from each other and the known congeners by a set of morphological characters and possess non-overlapping distribution ranges. Furthermore, the new species are also divergent (> 6.4% uncorrected p-distance) from their nearest related congeners, and from one another with respect to the ND2 mitochondrial gene. Recently, other new species of reptiles have been described from the two aforesaid type localities, indicating that further bio-inventories in the dry zones of peninsular India will yield more such novelties.


Assuntos
Ecossistema , Lagartos , Animais , Índia
6.
Zootaxa ; 5169(4): 301-321, 2022 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-36101233

RESUMO

We redescribe and illustrate the type specimens of ten taxa of sea snakes of the genera Hydrophis Latreille in Sonnini Latreille, 1801 and Laticauda Laurenti, 1768 in the collections of the Zoological Survey of India. The specimens comprise holotypes and syntypes of ten synonymous nominal taxa that represent seven valid nominal taxa. We here clarify that one specimen ZSI 8278 is a syntype of Hydrophis dayanus Stoliczka, 1872, not holotype as previously stated. In one case, four holotypes of four nominal taxa are synonyms of the same taxonHydrophis cyanocinctus Daudin, 1803. Many of these type specimens are herein first depicted in photographs in a publication.


Assuntos
Hydrophiidae , Laticauda , Animais , Elapidae , Índia
7.
Zootaxa ; 5209(1): 111-126, 2022 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-37045402

RESUMO

Uropeltis dindigalensis (Beddome, 1877) is a poorly known uropeltid (shieldtail) snake from peninsular India. Here we report morphological data for 14 preserved and nine uncollected specimens, most of which have not been previously reported. We designate a lectotype from the type series, describe it, and present the first published photographs of some of the type material. Recharacterization of U. dindigalensis clarifies its taxonomic distinctiveness and its geographical distribution. We report new natural-history observations from museum specimens and of individuals in life, including viviparity and feeding behaviour. The species is known only from the higher elevations of Sirumalai hills, in the southern end of the Eastern Ghats. Uropeltis dindigalensis appears somewhat capable of tolerating low-intensity agriculture. The main immediate conservation threats are probably greater intensity human activities, including road traffic, and possibly climate change given that the species is restricted to the uppermost elevations of a small hill range. The very small extent of occurrence within a single threat-defined location (none of which lies within a protected area), combined with decreasing quality and quantity of habitat, likely qualifies U. dindigalensis as Critically Endangered (or, at best, Endangered) under IUCN Red List criteria.


Assuntos
Ecossistema , Serpentes , Humanos , Animais , Mudança Climática , Espécies em Perigo de Extinção
8.
Mol Phylogenet Evol ; 165: 107300, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34474153

RESUMO

In widespread species, the diverse ecological conditions in which the populations occur, and the presence of many potential geographical barriers through their range are expected to have created ample opportunities for the evolution of distinct, often cryptic lineages. In this work, we tested for species boundaries in one such widespread species, the king cobra, Ophiophagus hannah (Cantor, 1836), a largely tropical elapid snake distributed across the Oriental realm. Based on extensive geographical sampling across most of the range of the species, we initially tested for candidate species (CS) using Maximum-Likelihood analysis of mitochondrial genes. We then tested the resulting CS using both morphological data and sequences of three single-copy nuclear genes. We used snapclust to determine the optimal number of clusters in the nuclear dataset, and Bayesian Phylogenetics and Phylogeography (BPP) to test for likely species status. We used non-metric multidimensional scaling (nMDS) analysis for discerning morphological separation. We recovered four independently evolving, geographically separated lineages that we consider Confirmed Candidate Species: (1) Western Ghats lineage; (2) Indo-Chinese lineage (3) Indo-Malayan lineage; (4) Luzon Island lineage, in the Philippine Archipelago. We discuss patterns of lineage divergence, particularly in the context of low morphological divergence, and the conservation implications of recognizing several endemic king cobra lineages.


Assuntos
DNA , Ophiophagus hannah , Animais , Teorema de Bayes , Filipinas , Filogenia , Piridazinas
9.
Zootaxa ; 4981(3): 577592, 2021 Jun 08.
Artigo em Inglês | MEDLINE | ID: mdl-34186705

RESUMO

We examined the holotype of Euprepes innotatus Blanford, 1870 which was presented to the Natural History Museum, London (NHMUK) by Blanford himself, and is redescribed herein. Based on the morphological similarity, we placed Eutropis innotata within the E. carinata group (contra Blanford, 1870), as it is closely allied to E. dissimilis and E. carinata in morphological and morphometric traits. Based on the current distribution pattern, we conducted Species Distribution Modelling using the Maximum Entropy algorithm and the distribution range of this species was predicted to be wider than the currently known limits within the south-central parts of the Deccan plateau. Furthermore, we updated the conservation status of E. innotata using the criteria of the IUCN Red List, and suggested it be considered as a species of Least Concern.


Assuntos
Distribuição Animal , Lagartos , Animais , Lagartos/classificação , Modelos Biológicos , Fenótipo , Filogenia , Especificidade da Espécie
10.
Zootaxa ; 4981(3): 449468, 2021 Jun 08.
Artigo em Inglês | MEDLINE | ID: mdl-34186711

RESUMO

We conducted a molecular phylogenetic study on the Boiga ceylonensis group from the Western Ghats of India, building on a recent morphology-based study. Our analysis supports previous work in elucidating the phylogenetic position of B. nuchalis and B. beddomei s. str. (of Matheran, Western Ghats) as clustering closely with B. ceylonensis, while B. flaviviridis clustered with the Sri Lankan taxon close to B. ranawanei. Additionally, our phylogenetic study revealed the presence of an undescribed taxon in the Southern Western Ghats, more closely related to B. ceylonensis than to any other sampled taxon, including sympatric congeners. This new taxon is described here as a new species Boiga whitakeri sp. nov. from the Devar MalaiAnaimalai hill complex. Based on molecular and morphometric studies, we expand the description of the recently described B. thackerayi as inhabiting almost the entire stretch of the Western Ghats. We also complement the diagnoses of B. nuchalis and B. flaviviridis, and determine the phylogenetic position of B. thackerayi with molecular data.


Assuntos
Colubridae , Filogenia , Distribuição Animal , Animais , Colubridae/anatomia & histologia , Colubridae/classificação , Colubridae/genética , Índia , Especificidade da Espécie , Simpatria
11.
Zootaxa ; 4950(2): zootaxa.4950.2.7, 2021 Mar 30.
Artigo em Inglês | MEDLINE | ID: mdl-33903442

RESUMO

We describe a new species of Asian gracile skink from the dry leeward slopes of the Nilgiri hills, Tamil Nadu state, India which forms a part of the eastern, rain shadow escarpment of the Western Ghats in peninsular India. The new species, Subdoluseps nilgiriensis sp. nov., is characterized by: slender, small-sized body (47-67 mm); sandy brown above, with each scale tipped with black; a thick black lateral band from snout to tail; a distinct white labial streak; dirty white venter, with throat having mild black striations; 28-29 midbody scale rows; 71-74 mid ventral scales; 66-69 paravertebral scales. The new species is described based on external morphological characters, genetic data and geographical isolation. Based on two mitochondrial DNA genes, we show that the new species shares a sister relationship with Subdoluseps pruthi (Sharma, 1977) which is found in parts of the Eastern Ghats in peninsular India. The discovery of this new population raises two novel scenarios. Firstly, it renders the genus Subdoluseps evolutionarily polyphyletic with respect to the Indian species included in this genus. Secondly, it falsifies the notion that S. pruthi group skinks are restricted to the Eastern Ghats. Our results further indicate that the dry zone of peninsular India has unrealized skink diversity that needs to be further explored.


Assuntos
Lagartos , Animais , Genes Mitocondriais , Índia , Lagartos/classificação , Lagartos/genética , Lagartos/fisiologia , Filogenia , Chuva , Areia
12.
Zootaxa ; 4779(3): zootaxa.4779.3.1, 2020 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-33055775

RESUMO

We conducted a taxonomic revision of the arboreal snakes of the Boiga ceylonensis-group, all inhabiting the Indian subcontinent. Based on 15 characters, recorded from more than 100 specimens, representing eight recognized taxa, we conducted a multivariate morphometric analysis to redefine the taxonomic boundaries. We provide redescriptions of the nominate taxa in this group based on re-examination of the name-bearing types. The types of B. ceylonensis, B. beddomei, B. barnesii, B. dightoni, B. nuchalis and B. andamanensis are redescribed, where appropriate lectotypes are selected, illustrated and their nomenclature, synonymy and distribution are discussed. Status of the nominate taxon Boiga ceylonensis dakhunensis Deraniyagala, 1955 is fixed as an objective junior synonym of Dipsas nuchalis Günther, 1875. An updated key to the species of this group is presented.


Assuntos
Colubridae , Distribuição Animal , Animais , Árvores
13.
Indian J Public Health ; 57(1): 43-6, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23649144

RESUMO

A descriptive study was conducted among 75 members of five Village Water and Sanitation Committees (VWSCs) and 15 local residents in Tamil Nadu, India to assess committee's formation and decision making process. There were 64% females and rest were males, all aged between 20 years and 45 years. A total of 50.7% of them passed 12 th standard and 29.3% belonged to self-help groups. Although, all of them were aware about presence of guidelines, none of them knew its contents. About 20% opined that meetings were not being conducted regularly. All members said that they had problems in attending meeting regularly, take decisions if at least 10 (67%) members are present and fund was not adequate for 1 year period. One-third of local residents did not know the committee formation process and none of them aware about guidelines. Formation and decision making process of VWSC should be improved to tackle the sanitation problem.


Assuntos
Participação da Comunidade/métodos , Saneamento/normas , Abastecimento de Água/normas , Adulto , Feminino , Humanos , Índia , Masculino , Pessoa de Meia-Idade , Saneamento/métodos , Grupos de Autoajuda/organização & administração , Grupos de Autoajuda/normas , Adulto Jovem
14.
Zootaxa ; 3637: 158-68, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-26046190

RESUMO

A new species of cat snake, related to Boiga beddomei (Wall, 1909), is described from the dry forests of eastern Peninsular India. It occupies a large geographic range from Berhampore (type locality), near the River Mahanadi in the northeast to Kaigal near the southern Eastern Ghats in the southwest. The new species is diagnosed by having the following combination of characters: 19 dorsal scale rows at midbody, a high number of ventral scales for the genus Boiga (248-259), a yellowish-green dorsal colouration with numerous faint black bands, an uniform, unpatterned yellow-coloured venter and a relatively short tail (0.180-0.200 of the total length).


Assuntos
Colubridae/classificação , Distribuição Animal , Estruturas Animais/anatomia & histologia , Animais , Colubridae/anatomia & histologia , Ecossistema , Feminino , Florestas , Índia , Masculino
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