Indraneil Das

Indraneil Das
University Malaysia Sarawak · Institute of Biodiversity and Environmental Conservation

D.Phil. (Oxon)

About

258
Publications
187,146
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Citations

Publications

Publications (258)
Article
Full-text available
Three new species of Cnemaspis are described from karst regions of Sarawak, Malaysia, on the island of Borneo. These are Cnemaspis matahari sp. nov. and C. sirehensis sp. nov. from limestone hills located in the Serian Division of western Sarawak, and C. lagang sp. nov. from Gunung Mulu, Miri Division, in northern Sarawak. All can be distinguished...
Article
Full-text available
We review the status, patterns, and progress of Malaysia's amphibian research in the 21 st century (2000-2021) with the main goal of identifying areas for improvement that can help focus and prioritise future research initiatives. Between the period of January 2000-September 2021, we found 280 publications that can be broadly grouped into five cate...
Book
Full-text available
While a majority of snakes occurring in Malaysia are not equipped with venom and constitute little threat to humans, a number of species can cause envenoming that may lead to permanent disability or death. The range of snakes of medical significance in Malaysia encompasses the families Natricidae, Elapidae, Pythonidae and Viperidae. The third editi...
Article
Full-text available
Xenodermidae is a generally poorly known lineage of caenophidian snakes found in South, East and Southeast Asia. We report molecular phylogenetic analyses for a multilocus data set comprising all five currently recognised genera and including new mi-tochondrial and nuclear gene sequence data for the recently described Stoliczkia vanhnuailianai. Our...
Article
Full-text available
Xenodermidae is a generally poorly known lineage of caenophidian snakes found in South, East and Southeast Asia. We report molecular phylogenetic analyses for a multilocus data set comprising all five currently recognised genera and including new mi-tochondrial and nuclear gene sequence data for the recently described Stoliczkia vanhnuailianai. Our...
Article
Full-text available
This population of Heosemys spinosa shows distinct morphological and colour differences between adult males and females, here interpreted as sexual dimorphism. The largest individual was a male (240.3 mm), which was well outside the size range encountered in females (143.4–211.4 mm) in this study. Males showed relatively flat-topped carapaces...
Article
Full-text available
Convergence in communication appears rare compared with other forms of adaptation. This is puzzling, given communication is acutely dependent on the environment and expected to converge in form when animals communicate in similar habitats. We uncover deep‐time convergence in territorial communication between two groups of tropical lizards separated...
Article
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, t...
Article
Full-text available
The paraphyletic group of Old World rock gecko genus Cnemaspis, currently comprises ~180 described species from Africa and Asia. The south-east Asian clade with 63 described species, is most diverse on the Thai-Malay Peninsula, with just five species known from Borneo, an island biodiversity hotspot. Karst regions are known as centres for species e...
Article
Social animals are expected to face a trade-off between producing a signal that is detectible by mates and rivals, but not obvious to predators. This trade-off is fundamental for understanding the design of many animal signals, and is often the lens through which the evolution of alternative communication strategies is viewed. We have a reasonable...
Cover Page
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A photographic guide to the Reptiles of Indian Subcontinent
Article
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One of the most urgent contemporary tasks for taxonomists and evolutionary biologists is to estimate the number of species on earth. Recording alpha diversity is crucial for protecting biodiversity, especially in areas of elevated species richness, which coincide geographically with increased anthropogenic environmental pressures - the world's so-c...
Article
Our knowledge of the conservation status of reptiles, the most diverse class of terrestrial vertebrates, has improved dramatically over the past decade, but still lags behind that of the other tetrapod groups. Here, we conduct the first comprehensive evaluation (~92% of the world's ~1714 described species) of the conservation 1 Joint senior authors...
Article
Full-text available
The appreciation of cryptic biological diversity, and the pace at which it is recognized, has greatly increased with the use of molecular systematic techniques. The gekkonid genus Cyrtodactylus Gray, 1827 is one example of a group that has undergone a particularly rapid increase in recognized diversity due to molecular systematic studies. Many of t...
Article
Emerging infectious diseases are on the rise in many different taxa, including, among others, the amphibian batrachochytrids, the snake fungal disease and the Severe Acute Respiratory Syndrome coronavirus 2 (SARS-CoV-2) virus, responsible for Coronavirus disease 2019 (COVID-19) in mammals. Following the onset of the pandemic linked to COVID-19, eas...
Article
Full-text available
Social media has, in the past decade, emerged unexpectedly as a powerful tool in citizen science (Liberatore et al. 2018). Whether unintended or formally integrated, it offers, among other benefits, mass participation in activities such as data collection in inventories, monitoring, or natural history observations (Tulloch 2013). It can be argued t...
Article
Full-text available
Most new cryptic species are described using conventional tree‐ and distance‐based species delimitation methods (SDMs), which rely on phylogenetic arrangements and measures of genetic divergence. However, although numerous factors such as population structure and gene flow are known to confound phylogenetic and species delimitation inferences, the...
Article
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Frogs of the genus Microhyla include some of the world's smallest amphibians and represent the largest radiation of Asian microhylids, currently encompassing 50 species, distributed across the Oriental biogeographic region. The genus Microhyla remains one of the taxonomically most challenging groups of Asian frogs and was found to be paraphyletic w...
Article
Aim Clutch size is a key life‐history trait. In lizards, it ranges over two orders of magnitude. The global drivers of spatial and phylogenetic variation in clutch have been extensively studied in birds, but such tests in other organisms are lacking. To test the generality of latitudinal gradients in clutch size, and their putative drivers, we pres...
Chapter
Full-text available
Of some 3700 extant species of snake, less than 750 are venomous – most of them not greatly harmful to humans. Yet snakes occupy an outsized niche in human imagination, both in regard to their potential medical impacts and in other cultural roles. In this chapter, we review available information on snakebites and fatalities from around the world, d...
Article
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We report recent observations, two new locality records and an updated overview of the distribution of Dopasia buettikoferi (Lidth de Jeude, 1905) from Borneo, as well as photographic documentation of this species showing colouration and patterns in living individuals and the holotype. This note represents the first complete compilation of distribu...
Article
Full-text available
Tropical biodiversity on the island of Borneo attracts biologists and laymen alike, and yet many parts of the island are left unexplored. The Ulu Baleh region in Sarawak, Malaysian Borneo is located in the headwaters of major tributary of Batang Rejang (Rejang River). Access into the area is limited and available only through river transportation,...
Article
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A new species of frog belonging to the genus Polypedates Tschudi is described from the state of West Bengal, Eastern India. A mid-sized frog, SVL ranges from 47.9-53.6 mm in males and 72.0 mm in the single female. The species is diagnosable in showing the following suite of characters: digits lack webbing, inner and outer metacarpal tubercles prese...
Article
Full-text available
The island of Borneo lies within one of the most biodiverse regions in the world. Despite this, its documented gekkonid diversity is not commensurate with other areas of Southeast Asia. The megadiverse genus Cyrtodactylus is especially un-derrepresented. Limestone-karst ecosystems, in particular, harbor many endemic Cyrtodactylus species, but only...
Article
Full-text available
The taxonomy of freshwater crabs requires a paradigm change in methodological approaches, particularly in investigations that use morphological techniques. The traditional morphometric approach (two-dimensional measurements) tends to be inappropriate for the identification of freshwater crabs due to their variable external morphology and lack of go...
Article
Full-text available
Aim: Variation in body size across animal species underlies most ecological and evolutionary processes shaping local‐ and large‐scale patterns of biodiversity. For well over a century, climatic factors have been regarded as primary sources of natural selection on animal body size, and hypotheses such as Bergmann's rule (the increase of body size wi...
Article
Full-text available
A large body of evidence indicates that evolutionary innovations of novel organs have facilitated the subsequent diversification of species. Investigation of the evolutionary history of such organs should provide important clues for understanding the basis for species diversification. An Asian natricine snake, Rhabdophis tigrinus, possesses a serie...
Article
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The current account presents the results of a 14-day amphibian survey at Maliau Basin Conservation Area (MBCA). With a total of approximately 170 man-hrs, 44 species were detected at four study sites during the field period; four more species were later discovered outside the two-week campaign. The results are compared to the results of previous su...
Book
Full-text available
While a majority of snakes occurring in Malaysia are not equipped with venom and constitute little threat to humans, a number of species can cause envenoming that may lead to permanent disability or death. The range of snakes of medical significance in Malaysia encompasses the families Natricidae, Elapidae, Pythonidae and Viperidae. This book highl...
Article
Full-text available
We collected two specimens of an undescribed species of Lygosoma from pitfall traps in an urban rainforest in Kuching and from the base of a forested hill in western Sarawak, East Malaysia. The new species is diagnosable from all south-east Asian congeners by morphological characters, and most closely resembles Lygosoma herberti from the Thai-Malay...
Article
Full-text available
Episodic sea level changes that repeatedly exposed and inundated the Sunda Shelf characterize the Pleistocene. Available evidence points to a more xeric central Sunda Shelf during periods of low sea levels, and despite the broad land connections that persisted during this time, some organisms are assumed to have faced barriers to dispersal between...
Data
Specimens, localities, and associated genbank accession numbers included in the study
Data
The concatenated BI phylogeny with support displayed for BI/ML analyses Support for the ML phylogeny indicated by bootstrap values (proportion of 1,000) and for the BI tree by posterior probabilities.
Data
RAxML gene trees with 100 rapid bootstrap replicates
Book
Full-text available
The ebook Land Snakes of Medical Significance can be downloaded via the link: http://www.mybis.gov.my/pb/1624 The purpose of this book is to highlight the potentially dangerous species to humans, with a list of the main potentially medically significant snakes. It is important to note that if a species is not listed below, it does not necessaril...
Article
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Data on nutrient contents of freshwater crabs are important for ecological studies and species conservation assessments, especially when the species concerned is threatened among others by habitat destruction and uncontrolled resources utilisation. Indeed comprehensive biological information is required to reconcile the needs between sustainable re...
Article
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A new species of the genus Tropidophorus is described from Putai, upper Baleh, Kapit districts, Sarawak, East Malaysia (Borneo). Tropidophorus sebi sp. nov. is diagnosable from congeners from Borneo by the combination of the following characters: head shields present, dorsal and lateral scales smooth; parietal scales in two pairs; supraciliaries ei...
Article
Full-text available
Effective communication requires animal signals to be readily detected by receivers in the environments in which they are typically given. Certain light conditions enhance the visibility of colour signals and these conditions can vary depending on the orientation of the sun and the position of the signaller. We tested whether Draco sumatranus glidi...
Article
Full-text available
Effective communication requires animal signals to be readily detected by receivers in the environments in which they are typically given. Certain light conditions enhance the visibility of colour signals and these conditions can vary depending on the orientation of the sun and the position of the signaller. We tested whether Draco sumatranus glidi...
Article
Full-text available
Tropidophorus micropus van Lidth de Jeude, 1905, described from the upper Mahakkam River, Kalimantan, Indonesia, is here redescribed, based on new material from upper Baleh, Sarawak, East Malaysia (Borneo), collected after over 100 years. The new locality is ca. 94 km to the north of the type locality, and comprises a new national record. © 2017, A...
Article
Full-text available
The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & Nemésio 2007; Donegan 2008, 2009; Nemésio 2009a–b; Dubois 2009; Gentile & Snell 2009; Minelli 2009;...
Data
This plot is not part of the published stance but derives from it. The plot shows the number of authors by geographic region (courtesy of Dr. Diego Astua).