• Home
  • Kelum Manamendra-Arachchi
Kelum Manamendra-Arachchi

Kelum Manamendra-Arachchi

About

58
Publications
32,493
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,072
Citations
Citations since 2016
8 Research Items
530 Citations
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Introduction
Skills and Expertise

Publications

Publications (58)
Article
Full-text available
Sri Lanka is an amphibian hotspot of global significance. Its anuran fauna is dominated by the shrub frogs of the genus Pseudophilautus . Except for one small clade of four species in Peninsular India, these cool-wet adapted frogs, numbering some 59 extant species, are distributed mainly across the montane and lowland rain forests of the island. Wi...
Article
Full-text available
We provide a detailed redescription of the two original type specimens of the little-known, endemic Andaman water monitor, Varanus salvator andamanensis Deraniyagala, 1944. Examination of further voucher specimens allows for an expanded morphological diagnosis of this island taxon and comparison with other currently recognized subspecies of the wid...
Article
Full-text available
We provide a detailed redescription of the two original type specimens of the little-known, endemic Andaman water monitor, Varanus salvator andamanensis Deraniyagala, 1944. Examination of further voucher specimens allows for an expanded morphological diagnosis of this island taxon and comparison with other currently recognized subspecies of the wid...
Article
Pseudophilautus comprises an endemic diversification predominantly associated with the wet tropical regions of Sri Lanka that provides an opportunity to examine the effects of geography and historical climate change on diversification. Using a time-calibrated multi-gene phylogeny, we analyze the tempo of diversification in the context of past clima...
Article
Full-text available
The monotypic genus Lankanectes, considered an evolutionary long branch with India's Nyctibatrachus as its sister lineage, is represented by L. corrugatus, a species widely distributed within the wet zone of Sri Lanka up to 1500 m asl, where it inhabits a variety of lotic and lentic habitats. Here, following an integrative taxonomic approach using...
Article
Full-text available
Based on a recent molecular phylogenetic study, the South Asian microhylid genus Uperodon (subfamily Microhylinae) currently comprises of 12 valid species that are largely restricted to India and Sri Lanka. Considering the revised generic-level status of its various members, here we review the taxonomy of all known species in this genus and clarify...
Article
Full-text available
Species boundaries and patterns of gene flow in Dwarf toads, Duttaphrynus scaber and D. atukoralei, were assessed using mitochondrial DNA markers. Samples from four populations in Sri Lanka (Mihintale, Ampara, Yala, Galle) were analyzed for three mitochondrial gene fragments (16S rRNA, COI and Cyt b) along with four Genbank sequences of 16S rRNA fr...
Article
Full-text available
The bufonid genus Adenomus, an endemic of the montane and lowland rainforests of central and south-western Sri Lanka, has been considered to comprise of three species, viz. A. kelaartii, A. dasi and A. kandianus, the last of which has been recently highlighted as " the world's rarest toad " . We conducted a survey across the known range of Adenomus...
Article
The South Asian Cichlidae are composed of two clades that together represent the sister group of the Madagascan genus Paretroplus Bleeker. Chaetodon suratensis Bloch and Etroplus canarensis Day are retained in Etroplus Cuvier, while Chaetodon maculatus Bloch is allocated to Pseudetroplus Bleeker. Pseudetroplus is distinguished from Etroplus in havi...
Article
Full-text available
In this article we are highlighting some of the ongoing and recently completed research by the Amphibian Research Group at the Department of Zoology, Faculty of Science, University of Peradeniya, Sri Lanka. Some of the work, especially the taxonomic research by us, is essentially an extension of the rigorous explorations and descriptions carried ou...
Data
Full-text available
Since the offi cial implementation of zoological nomenclature by Carl von Linné in 1758 there has been a steady increase in the number of recognized extant amphibian species. However, rates of species descriptions over time have been neither constant nor decreasing – as one would expect when assuming that the number of undiscovered species decrease...
Article
Full-text available
The vast majority of the world's anurans feed terrestrially, with aquatic prey capture having been observed in only a handful of species. We tested the predation behaviour of the strictly aquatic 'fanged' frog Lankanectes corrugatus (Nyctibatrachidae) by providing specimens with both aquatic and terrestrial feeding opportunities. The frogs successf...
Article
Context Lands without agricultural or urban use embedded within agricultural and urban regions now account for ∼35% of Earth's terrestrial extent. Although created by human disturbances, these 'novel ecosystems', usually poor in native flora and often dominated by alien species, do not require human intervention for their maintenance. Given their l...
Article
Two new species of Sri Lankan shrub frogs of the genus Pseudophilautus are described. These species are diagnosed from their congeners on the basis of morphology, morphometrics and mitochondrial DNA sequence data. Pseudophilautus schneideri, new species, is distinguished from all Sri Lankan Pseudophilautus by its small size (< 22.8 mm SVL), distinc...
Article
Full-text available
Aruwakkalu fossil bed is a part of Sri Lanka's Jaffna limestone, which underlies the whole of Jaffna Peninsula and extends southwards mostly along the west coast. Previous authors have suggested that Aruwakkalu contains a rich assemblage of vertebrate and invertebrate fossils. We sought to confirm the Burdigalian age of this northwestern Miocene de...
Article
Full-text available
Phylogenetic relationships among foam-nesting clades of Old World tree frogs are analyzed using both nuclear and mitochondrial DNA data, with particular focus on Sri Lankan members of the genus Polypedates. A distinctive, highly supported endemic Sri Lankan clade is identified, and recognized as a new genus, Taruga. This clade, which had previously...
Article
The hump-nosed pit vipers of the genus Hypnale are of substantial medical importance in Sri Lanka and India, being included among the five snakes most frequently associated with life-threatening envenoming in humans. The genus has hitherto been considered to comprise three species: H. hypnale, common to Sri Lanka and the Western Ghats of peninsular...
Article
The hump-nosed pit vipers of the genus Hypnale are of substantial medical importance in Sri Lanka and India, being included among the five snakes most frequently associated with life-threatening envenoming in humans. The genus has hitherto been considered to comprise three species: H. hypnale, common to Sri Lanka and the Western Ghats of peninsular...
Data
FIGURE 1. PC 1 vs. PC 2 factor scores of the principal components analysis of Philautus tanu, n. sp., P. singu n. sp., P. mittermeieri and P. decoris, show these four species to separate well from each other in PC space. Most of the variation is explained by the PC 1 axis, which relates mainly to body size (P. decoris is the largest and P. tanu the...
Data
FIGURE 6. Philautus singu: a, ventral aspect of left manus; b, ventral aspect of left pes; and c, semi-diagrammatic representation of left-pes webbing pattern of the holotype, male, WHT 6034, 16.2 mm SVL. Scale bar: 1 mm.
Data
FIGURE 7. South-western Sri Lanka, showing the distribution of Philautus singu (squares) and P. t a n u (circles), and place-names cited in the text.
Data
FIGURE 3. Unweighted Maximum Parsimony tree of 12 s and 16 s rRNA gene fragments, with maximum parsimony bootstrap values shown at the nodes. The two new species, Philautus tanu and P. singu (indicated by asterisks), form a clade with P. mittermeieri and P. decoris.
Data
FIGURE 5. Philautus singu: a, lateral; b, dorsal; and c, ventral aspects, respectively, of head of holotype, male, WHT 6034, 16.2 mm SVL. Scale bar: 1 mm.
Data
FIGURE 9. Philautus tanu: a, lateral; b, dorsal; and c, ventral aspects, respectively, of head of holotype, male, WHT 6348, 13.5 mm SVL. Scale bar: 1 mm.
Data
FIGURE 10. Philautus tanu: a, ventral aspect of left manus; b, ventral aspect of left pes; and c, semi-diagrammatic representation of the left-pes webbing pattern of the holotype, male, WHT 6348, 13.5 mm SVL. Scale bar: 1 mm.
Data
FIGURE 2. Maximum likelihood tree of 12 s and 16 s rRNA gene fragments, with posterior probabilities from the Bayesian analysis shown at nodes. The two new species, Philautus tanu and P. singu (indicated by asterisks), form a clade with P. mittermeieri and P. decoris.
Data
FIGURE 1. Hypnale hypnale, WHT 5852, male, 311.0 mm SVL: a, b, c, lateral, dorsal and ventral aspects, respectively, of head; d, e, everted left hemipenis, showing (f) enlarged view of a hemipenial lobe; g, dorsal view of paravertebral scale; h, medial view of right palatine of WHT 5857, male, 343.0 mm SVL.
Data
FIGURE 3. Hypnale hypnale: a, dosal aspect of neotype, BNHS 2531 - 759, female, 350.0 mm SVL; b, dorso-lateral aspect of a specimen from Galle, Sri Lanka (not preserved); c, reproduction of drawing of H. hypnale in Russell (1801).
Data
FIGURE 7. Hypnale zara: a, dorsal aspect of holotype, BMNH 1946.1. 19.96, male, 303.0 mm SVL; b, lateral aspect of WHT 2198, male, 338 mm SVL; c, specimen from Kottawa, Galle, Sri Lanka, not preserved.
Data
FIGURE 2. Hypnale hypnale, a, distribution in India; b, distribution in Sri Lanka; based on material examined in present study.
Data
FIGURE 5. Hypnale nepa: a, iconotype, male, reproduced from Seba (1734); b, WHT 6515, neotype, male, 367.0 mm SVL, Agra Arboretum, Agrapatana, Sri Lanka; c, topotypical specimen showing different coloration, not preserved.
Data
FIGURE 8. Hypnale sp. ‘ amal’, WHT 7140, male, 325.0 mm SVL: a, b, c, lateral, dorsal and ventral aspects respectively of head; d, dorsal view of paravertebral scale; e, medial view of right palatine; and f, distribution in Sri Lanka.
Data
FIGURE 6. Hypnale zara: WHT 2198, male, 338.0 mm SVL: a, b, c, lateral, dorsal and ventral aspects, respectively, of head; d, e, everted left hemipenis, showing (f) enlarged view of a hemipenial lobe of WHT 5848, 288.0 mm SVL; g, dorsal view of paravertebral scale of WHT 2198; h, medial view of right palatine of WHT 6089, male, 297.0 mm SVL; and i,...
Data
FIGURE 9. Hypnale sp. ‘ amal’: a, WHT 7140, male, 325.0 mm SVL; b, collection locality: a home garden at Wataraka, Galle, Sri Lanka.
Data
FIGURE 4. Hypnale nepa, WHT 6515, neotype, male, 367.0 mm SVL: a, b, c, lateral, dorsal and ventral aspects, respectively, of head; d, e, everted left hemipenis, showing (f) enlarged view of a hemipenial lobe; g, dorsal view of paravertebral scale; h, medial view of right palatine of WHT 6082, male, 292.0 mm SVL; and i, distribution in Sri Lanka: H...
Article
Full-text available
We describe a new species of coralsnake, Calliophis haematoetron, from central Sri Lanka. This is the second species of coralsnake known from the island country, after Calliophis melanurus. It differs from C. melanurus in coloration, possessing a relatively unpigmented head (vs. capped with black from rostrum to nuchal collar), no light spots poste...
Data
FIGURE 1. Calliophis haematoetron, adult female holotype, 371 mm TL, WHT 1621. Photo by M. M. Bahir, courtesy of WHT (UTA Image- 1928).
Data
FIGURE 3. Ventral aspects of heads of Calliophis haematoetron, adult female holotype, WHT 1621 (Top) and Calliophis melanurus, adult male from Sooriyawewa, Sri Lanka, NMSL- 01 (Bottom), showing distinct arrangement of scales in C. haematoetron with first sublabial scale (white) not touching the second pair of chin-shields (black) because of interru...
Data
FIGURE 4. Distribution of Calliophis haematoetron (circles) and Calliophis melanurus sinhaleyus (triangles) in Sri Lanka. Type localities in white symbols. Localities for C. melanurus are those of material examined, unpublished localities kindly provided by Mr. L. J. Mendis Wickramasinghe, and those given by Wall (1921), Smith (1943), Deraniyagala...
Data
FIGURE 7. Tea plantation and current levels of deforestation at Rattota, Matale, Central Province, Sri Lanka, near locality of Calliophis haematoetron paratype. Photo by R. Somaweera.
Data
FIGURE 5. Type locality of Calliophis haematoetron, Wasgomuwa National Park, Central Province, Sri Lanka, ca. 90 m showing leaf litter being searched by scientists of WHT, the activity that led to the collection of the new species by Mohomed M. Bahir and Sampath Nanayakkara on 7 June 1997. Photo courtesy of WHT (UTA Image- 1929).
Data
FIGURE 6. Locality in Rattota, Matale, Central Province, Sri Lanka, near locality of Calliophis haematoetron paratype showing recent vegetation in the area, hills and rock cliffs. Photo by R. Somaweera.
Data
FIGURE 8. Larval nematode (Spiruridae) found encysted in abdominal cavity of female paratype Calliophis haematoetron. A. Anterior end and buccal area. B. Terminal spine. C. Body.
Article
Full-text available
A new species of crocidurine shrew, Crocidura hikmiya, is described from the Sinharaja World Heritage Site, Sri Lanka. The species is diagnosed on the basis of both morphology and mitochondrial DNA sequence data. Morphologically C. hikmiya is distinguished from C. miya, among other characters, by having a shorter tail, condyles protruding beyond th...
Article
Full-text available
All nominal species assigned to the diurnal geckos of the genus Cnemaspis Strauch, 1887 from Sri Lanka are reviewed and re-described on the basis of their name-bearing types. Based on a recentsurvey, eleven new species are described from Sri Lanka: C. clivicola, C. kallima, C. latha, C. amith, C. menikay, C. pava, C. phillipsi, C. pulchra, C. punct...
Article
Direct development has evolved in rhacophorine frogs independently from other anuran lineages, thereby offering an opportunity to assess features associated with this derived life history. Using a developmental series of the direct-developing Philautus silus (Ranidae: Rhacophorinae) from Sri Lanka, we examine features of cranial morphology that are...
Article
Full-text available
An extensive survey of amphibians in Sri Lanka, a 65,000 km 2 continental island, has recently served to uncover ~100 new species of amphibians, mostly Oriental shrub-frogs of the endotrophic genus Philautus. Comparison of specimens acquired in the course of this survey with type and other historical collections have previously shown that 19 specie...
Article
Full-text available
An extensive survey of amphibians in Sri Lanka, a 65,000 km2 continental island, has recently served to uncover ~100 new species of amphibians, mostly Oriental shrub-frogs of the endotrophic genus Philautus. Comparison of specimens acquired in the course of this survey with type and other historical collections have previously shown that 19 species...
Article
Full-text available
The endemic ovoviviparous Sri Lankan lizard genus Cophotis has hitherto been considered to comprise only a single species, C. ceylanica Peters, 1861, restricted to tropical montane cloud forests at elevations above ~1,700 m in the southern part of Sri Lanka’s central highlands. Here we describe a second species, Cophotis dumbarae, from an elevation...
Article
Full-text available
An extensive survey of amphibians in Sri Lanka, a 65,000 km 2 continental island, has recently served to uncover ~100 new species of amphibians, mostly Oriental shrub-frogs of the endotrophic genus Philautus. Comparison of specimens acquired in the course of this survey with type and other historical collections have previously shown that 19 specie...
Article
Full-text available
Two distinct nesting behaviours are reported from 98 clutches (80 in situ and 18 ex situ) of 17 species of direct-developing Philautus from Sri Lanka. The species examined, belong to three communities spanning 400–2,200 m elevation. Sixteen species are 'ground nesters', depositing 6–155 cream or white eggs in 5–35 mm deep nests excavated by the fem...
Article
Full-text available
Eight new species of Sri Lankan frogs of the genus Philautus are described (P. mooreorum, P. poppiae, P. hoffmanni, P. mittermeieri, P. frankenbergi, P. hallidayi, P. steineri and P. stuarti). The species are diagnosed on the basis of mitochondrial DNA sequence, morphological features and, in two cases, bioacoustics data. Six of the eight species a...
Article
Full-text available
The apparent biotic affinities between the mainland and the island in the Western Ghats–Sri Lanka biodiversity hotspot have been interpreted as the result of frequent migrations during recent periods of low sea level. We show, using molecular phylogenies of two invertebrate and four vertebrate groups, that biotic interchange between these areas has...

Network

Cited By