Olivier S. G. Pauwels

Olivier S. G. Pauwels
Royal Belgian Institute of Natural Sciences · Department of Recent Vertebrates

B. Sc., M. Sc., D.E.A.

About

341
Publications
210,325
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Introduction
Besides being curator of the rich and diverse recent vertebrate collections of the RBINS, I work on the conservation, ecology and systematics of Southeast Asian, Eurasian and Afrotropical herpetofaunas and other vertebrates. For more details on current research projects, more pdf files and photos of all reptile (85+), amphibian (10+) and insect taxa I co-described, pls see WWW.PAUWELSOLIVIER.COM. Feel free to contact me for information and collaborations.
Additional affiliations
January 1996 - September 2017
Royal Belgian Institute of Natural Sciences
Position
  • Research Associate

Publications

Publications (341)
Article
Full-text available
We present various predation records based on museum-preserved snakes from southeastern Republic of Guinea, West Africa: Aparallactus niger (Atractaspididae) on an earthworm (Oligochaeta); Crotaphopeltis hotamboeia (Colubridae) on Sclerophrys sp. (Anura; Bufonidae); Grayia smithii (Colubridae) and Natriciteres variegata (Natricidae) on Arthroleptis...
Article
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Based on 85 examined specimens, photographs of living specimens and illustrations published in the literature, we refine the distribution ranges of both Gonyosoma prasinum (Blyth, 1854) and of the recently described species Gonyosoma coeruleum Liu, Hou, Ye Htet Lwin, Wang & Rao, 2021, which was not clearly addressed in its original description. We...
Article
Annandale (1906) described Lygosoma megalops, now in the genus Lankascincus, based on two syntypes collected from Kitulgala and Puttalam in Sri Lanka. These syntypes have not been recognized since the original description. In 2019, Batuwita designated a neotype, WHT 6545, for Ly. megalops from Kitulgala. The number WHT '6545' does not exist in the...
Article
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We describe Gehyra wongchan sp. nov. from Tham Khao Chan (Khao Chan Cave), Tha Luang District, and Wat Khao Wong, Kok Samrong District, in Lopburi Province, central Thailand. The new species differs from all currently recognized Gehyra by the following combination of morphological characters and dorsal color pattern: maximal known snout–vent length...
Article
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Functional traits offer a rich quantitative framework for developing and testing theories in evolutionary biology, ecology and ecosystem science. However, the potential of functional traits to drive theoretical advances and refine models of global change can only be fully realised when species-level information is complete. Here we present the AVON...
Article
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Fossoriality evolved early in snakes, and has left its signature on the cranial morphology of many extinct Mesozoic and early Caenozoic forms. Knowledge of the cranial osteology of extant snakes is indispensable for associating the crania of extinct lineages with a particular mode of life; this applies to fossorial taxa as well. In the present work...
Article
We re-evaluate the taxonomic identities of five-lined skinks of the genus Eutropis (E. trivittata, E. beddomei, E. nagarjunensis, and E. bibronii) inhabiting the Indian subcontinent. Previously it has been considered that E. trivittata is distributed in the western India and E. dissimilis in the northern India (from north-eastern India up to Pakist...
Chapter
I provide a commented list of the amphibian species found in the Lower Ogooué region, western Gabon, Equatorial Africa, from Ndjolé and Lambaréné to Port-Gentil and Omboué. The list includes 44 species (Dermophiidae, Arthroleptidae, Bufonidae, Conrauidae, Hyperoliidae, Phrynobatrachidae, Pipidae, Ptychadenidae, Pyxicephalidae, Ranidae and Rhacophor...
Chapter
Citation: Stévart, T., Pauwels, O.S.G. & Vande weghe, J.P. 2021. Chapter 11. Conservation. Pp. 316-323 in: Vande weghe, J.P. & Stévart, T. (eds). The Ogooué Delta. Missouri Botanical Garden Press, Saint Louis: 328 pp.
Chapter
I provide a commented list of the reptile species found in the Lower Ogooué region, western Gabon, Equatorial Africa, from Ndjolé and Lambaréné to Port-Gentil and Omboué. The list includes 85 species (Pelomedusidae, Cheloniidae, Dermochelyidae, Testudinidae, Trionychidae, Crocodylidae, Agamidae, Chamaeleonidae, Gekkonidae, Gerrhosauridae, Lacertida...
Article
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We provide new data on the reproduction of the Rwandan Green Snake Philothamnus ruandae (Squamata : Colubridae) based on high resolution x-ray computed tomography of five adult pregnant females, including the holotype and three paratypes. The smallest gravid female has a snout-vent length of 552 mm, and clutch size varies from 4 to 12.
Poster
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Grayia is a genus of relatively large (1.5 – 2.5 m) aquatic Afrotropical snakes that is currently comprised of four species. Recent molecular phylogenies recovered Grayia in its own distinct subfamily (Grayiinae), which was strongly supported as the sister group to Colubrinae. Because tropical African snakes are generally understudied, the relation...
Article
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We present new Gabonese locality records, ecological or morphological data for Pelusios castaneus (Pelomedusidae), Kinixys erosa (Testudinidae), Osteolaemus tetraspis (Crocodylidae), Agama agama (Agamidae), Monopeltis galeata (Amphisbaenidae), Feylinia currori, Trachylepis polytropis (Scincidae), Varanus ornatus (Varanidae), Philothamnus hughesi, R...
Article
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We describe a colorful and distinctively patterned, karst-dwelling pitviper, Trimeresurus kuiburi sp. nov., from the isolated, coastal massif of Khao Sam Roi Yot in Kui Buri District, Prachuap Khiri Khan Province, in northern Peninsular Thailand. The new species, member of the ‘Cryptelytrops group’ sensu Malhotra & Thorpe (2004) and morphologically...
Article
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We describe Dixonius mekongensis sp. nov. from sandstone formations in Khong Chiam District, Ubon Ratchathani Province, in extreme eastern Thailand along the Laotian border. The new species differs from all currently recognized Dixonius by the following combination of morphological characters and pattern: maximal known snout-vent length of 51.2 mm;...
Article
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We describe Gekko pradapdao sp. nov. from Tham Khao Chan (Khao Chan Cave), Tha Luang District, Lopburi Province, in central Thailand. The new species, a member of the subgenus Gekko, differs from all currently recognized Gekko species by the following combination of morphological characters and pattern: maximal known snout-vent length of 127.1 mm,...
Poster
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This poster outlines the role that can be played by natural science collections for monitoring of environmental contaminants in biota
Article
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Karstic landscapes are immense reservoirs of biodiversity and range-restricted endemism. Nowhere is this more evident than in the world’s third-largest vertebrate genus Cyrtodactylus (Gekkonidae) which contains well over 300 species. A stochastic character mapping analysis of 10 different habitat preferences across a phylogeny containing 345 descri...
Article
The genus Toxicodryas, historically included with the renowned Australasian cat-eyed snakes of the colubrid genus Boiga, currently includes two widespread species (T. blandingii and T. pulverulenta) in western, central, and eastern Africa. We leverage findings from a recent phylogenomic and historical demographic analysis of this genus (based on 28...
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
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Species of the genus Hebius Thompson, 1913 with 17 or 19 dorsal scale rows at midbody and an overall dark venter are reviewed, including the two species previously known as Parahelicops annamensis Bourret, 1934 and Pararhabdophis chapaensis Bourret, 1934. Specimens with 17 scale rows are morphologically similar to Hebius venningi (Wall, 1910), whic...
Article
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We describe two new Kukri snakes of the genus Oligodon from the Nakhon Si Thammarat Mountain Range, southern peninsular Thailand. Oligodon phangan sp. nov., endemic to Pha-Ngan Island, Surat Thani Province, is characterized by a maximal known SVL of 369.1 mm; 12 maxillary teeth, the posterior three enlarged; 17-17-15 dorsal scale rows; 163-166 vent...
Article
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We describe Dixonius dulayaphitakorum sp. nov. from Ranong city, Ranong Province, southern peninsular Thailand. The new, ground-dwelling species differs from all currently recognized Dixonius by a combination of morphological characters and pattern: maximal known SVL of 47.8 mm, 22 longitudinal rows of dorsal tubercles; 33 to 35 paravertebral scale...
Article
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Hyla intermedia is an endemic Italian tree frog species, distributed from the southern edge of the Alpine massif to the tip of Calabria and into Sicily. Previously referred as the widespread Hyla arborea, it has only recently been recognized as a distinct species. It shows a bright, uniformly green dorsal coloration. We report a previously unknown...
Article
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We describe Dixonius pawangkhananti sp. nov. from coastal limestone hills in Cha-am District, Phetchaburi Province, peninsular Thailand. The new species differs from all currently recognized Dixonius by the following combination of morphological characters and pattern: maximal known snout-vent length of 42.6 mm; 16 longitudinal rows of dorsal tuber...
Article
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We report the colonization by the aquatic Dice snake Natrix tessellata of five artificial islands (A Island, D Island, DC 05, EPC 03 and EPC 04), built in the 2000s to house oil industry activities in the Kazakh sector of the Caspian Sea, western Kazakhstan. We discuss possible modes of colonization (e.g., accidental transport by boat originating f...
Article
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We present new Gabonese locality records, ecological and morphological data or unpublished material for Kinixys erosa (Testudinidae), Trachylepis albilabris (Scincidae), Calabaria reinhardtii (Boidae), Dasypeltis fasciata, Hapsidophrys smaragdinus, Philothamnus carinatus, P. heterodermus and P. nitidus nitidus, Thrasops flavigularis, Toxicodryas bl...
Article
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We present new Gabonese locality records, ecological and morphological data and unpublished material for Pelusios gabonensis (Pelomedusidae), Kinixys erosa (Testudinidae), Hemidactylus mabouia (Gekkonidae), Lepidothyris striatus, Trachylepis affinis (Scincidae), Crotaphopeltis hotamboeia, Dipsadoboa underwoodi and D. viridis (Colubridae), Dendroasp...
Article
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We analyze an important new opus on the snakes of West and Central Africa co-authored by Jean-Philippe Chippaux and Kate Jackson. We correct the identification of some of the illustrated snakes of the genera Dipsadoboa, Grayia, Limaformosa and Philothamnus. We provide more detailed localities for more than 30 photographs of snakes of the genera Atr...
Article
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We document a case of predation by a Naja samarensis from South Cotabato Province, Mindanao Island, Philippines, on a Cyclocorus nuchalis nuchalis through X-ray computed tomography and photography. The snout-vent length of the juvenile cobra was 301 mm while the SVL of its adult lamprophiid prey was more than 228 mm. It is the first squamate prey r...
Poster
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Citation: Movalli, P., Ramello, G., Sbokos, J., Dekker, R., Vrezec, A., Shore, R.F., García-Fernández, A.J., Wernham, C., Krone, O., Alygizakis, N., Aradis, A., Badry, A., Barbagli, F., Berry, P., Biesmeijer, K., Boano, G., Bond, A.L., Choresh, Y., Kristensen, J.B., Cincinelli, A., Danielsson, S., Dias, A., Dietz, R., Eens, M., Espín, S., Eulaers,...
Article
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Based on the finding of an adult individual in Musigati, Bubanza Province, we provide the first record of the fossorial skink genus Feylinia (Squamata: Scincidae) and the species F. currori in Burundi, central Eastern Africa. Citation: Pauwels, O.S.G. 2019. Feylinia currori Gray, 1845, Curror’s Limbless Skink. African Herp News, 71: 42-44.
Article
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We digitized the female holotype of Aparallactus modestus ubangensis (Squamata: Lamprophiidae: Aparallactinae), from Zongo near the Ubangi Rapids, Democratic Republic of the Congo, using X-ray computed tomography. The CT scan revealed that it was gravid and contained four eggs with dimensions ranging from 22.4-29.5 x 5.3-5.8 mm. Citation: Brecko, J...
Article
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The Nile Soft-shelled Turtle, Trionyx triunguis, has not been documented in Lebanon for several decades, and it was even suggested that the species no longer inhabits the country. We document a record made in March 2019 of a large adult female individual found in an irrigation canal just south of the Tyre Coast Nature Reserve in southern Lebanon. A...
Article
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An update is provided of current knowledge of the herpetofauna and batrachofauna recorded from caves in Gabon, western Equatorial Africa. No systematic field survey of reptiles and amphibians in Gabonese cave environments has yet been made, and data are available for only 19 (complexes of) caves. This compilation of published records and new observ...
Article
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Atractaspidines are poorly studied, fossorial snakes that are found throughout Africa and western Asia, including the Middle East. We employed concatenated gene-tree analyses and divergence dating approaches to investigate evolutionary relationships and biogeographic patterns of atractaspidines with a multi-locus data set consisting of three mitoch...
Article
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Presented is a compilation of new locality records with natural history data for 49 reptile species in Haut-Ogooué Province, southeastern Gabon, Equatorial Africa. One new snake species record is added to Gabon (Colubridae: Philothamnus hughesi), 14 new reptile species records to Haut-Ogooué Province, three new reptile records for Léconi Park, and...
Article
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We analyze a selection of new and published predation cases of spiders (Araneae: Ctenidae and Pisauridae) on Afrotropical anuran amphibians (Amphibia: Anura), including (re-)identifications of the predators and preys involved. Reported cases occurred in Cameroon, Democratic Republic of the Congo, Gabon, Ghana, Ivory Coast, Kenya, Madagascar, Mozamb...
Article
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Angola and the Democratic Republic of the Congo are relatively unknown in terms of their herpetological diversity. Based on specimens collected in the Congolese region of the Katanga and the northeast of Angola during the first decades of the twentieth century, de Witte and Laurent independently suggested, based on morphological and coloration diff...
Article
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We describe a new stiletto snake, Atractaspis , from western Liberia and southeastern Guinea. The new species shares with morphologically similar western African Atractaspis species, A.reticulata and A.corpulenta , the fusion of the 2 nd infralabial with the inframaxillary. From A.corpulenta the new species differs by a more slender body (276–288 v...
Article
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An integrative taxonomic analysis using color pattern, morphology, and 1449 base pairs of the ND2 mitochondrial gene and its five flanking tRNAs demonstrated that eight species-level lineages occur within the Cyrtodactylus intermedius complex (Cyrtodactylus intermedius sensu stricto, C. phuquocensis and related populations) of the Cardamom mountain...
Article
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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
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No field studies have been conducted characterizing the habitat characteristics and eventual spatial resource partitioning between softshell turtles (family Trionychidae) in West and Central Africa. Here, we analyze the macrohabitat, microhabitat (along four variables), and apparent population abundance of Nile Soft-shelled Terrapin (Trionyx triung...
Technical Report
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The legless skink Isopachys anguinoides (Squamata: Scincidae), endemic to peninsular Thailand, has been assessed as Least Concern because of its wide ecological tolerance and its presence in a national park. It lives in dense rainforest as well as in plantations and on beaches. Citation: Sumontha, M., Cota, M., Ineich, I. & Pauwels, O.S.G. 2018. Is...
Technical Report
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Khorat Supple Skink Lygosoma koratense (Squamata: Scincidae), endemic to Thailand (Nakhon Ratchasima and Saraburi provinces) has been assessed as Least Concern because it is not under any major threat and is unlikely to be experiencing significant population declines due to its adaptability. Citation: Sumontha, M., Cota, M., Danaisawat, P. & Pauwel...
Article
Full-text available
We present new Gabonese locality records, ecological and morphological data or unpublished material for Kinixys erosa (Testudinidae), Osteolaemus tetraspis (Crocodylidae), Agama agama and A. lebretoni (Agamidae), Rhampholeon spectrum, Trioceros cristatus and T. owenii (Chamaeleonidae), Hemidactylus mabouia (Gekkonidae), Holaspis guentheri (Lacertid...
Poster
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At the end of 2016, the Royal Belgian Institute of Natural Sciences (RBINS), acquired two µCT scanners, through a budget of the Belgian Science Policy (BELSPO) to digitize its precious collection. The two µCT scanners, a RX Solutions EasyTom 150 (http://www.rxsolutions.fr/) and a XRE UniTOM (https://xre.be/), with a resolution of 4µm and maximal po...
Article
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We studied a collection of snakes (Crotaphopeltis hotamboeia, Hapsidophrys lineatus, Philothamnus heterodermus, Rhamnophis batesii [Colubridae], Dendroaspis jamesoni jamesoni, Naja melanoleuca [Elapidae], Aparallactus modestus, Polemon gracilis, Psammophis cf. phillipsii [Lamprophiidae], Letheobia caeca [Typhlopidae], Bitis arietans, B. gabonica an...
Chapter
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More than 100 amphibian and reptile species have established populations outside their natural geographical range, mostly as a consequence of the international pet trade. About 40 zoonoses are associated with reptiles and amphibians. The main zoonotic risks from alien invasive reptiles and amphibians are salmonellosis and probably also vibriosis fr...
Article
Full-text available
We present new Gabonese locality records, ecological and morphological data or unpublished material for Pelusios gabonensis (Pelomedusidae), Kinixys erosa (Testudinidae), Cycloderma aubryi (Trionychidae), Osteolaemus tetraspis (Crocodylidae), Hemidactylus richardsonii (Gekkonidae), Trachylepis affinis and T. maculilabris (Scincidae), Varanus ornatu...
Article
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Une mission naturaliste pluridisciplinaire a été organisée par la société Biotope, du 07 au 12 octobre 2017, dans le secteur ouest du site Ramsar des Monts Birougou (Province de la Ngounié). L’objectif était de récolter des données naturalistes préliminaires (Amphibiens, Reptiles, Poissons, Oiseaux et Mammifères) afin de compléter les connaissances...
Technical Report
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The Tuberculate Bent-toed Gecko Cyrtodactylus macrotuberculatus (Squamata: Gekkonidae) was listed as Least Concern on the basis that this species is known from nine localities across an area of approximately 15,000 km2 in southern Thailand and peninsular Malaysia, within which it is relatively common, and there are no confirmed threats. While it is...
Article
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We describe a new karst-dwelling Cyrtodactylus - C. thathomensis - from Ban Thathom, Xiangkhoang Province, northeastern Laos. The new species can be distinguished from other congeners by having four dark dorsal bands between limb insertions, a discontinuous nuchal loop, 10 precloacal pores in males or 10-12 precloacal pits (females) separated by a...