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On a New Species of the Lycodon Fasciatus

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On a New Species of the Lycodon Fasciatus MAJOR ARTICLE TAPROBANICA, ISSN 1800–427X. January, 2015. Vol. 07, No. 01: pp. 1–7, pls. 1–3. © Research Center for Climate Change, University of Indonesia, Depok, Indonesia & Taprobanica Private Limited, Homagama, Sri Lanka www.taprobanica.org LSID: urn:lsid:zoobank.org:pub:8419F5CA-3370-41EA-B067-94B348747264 A NEW MONTANE SPECIES OF THE GENUS Pareas WAGLER, 1830 (SQUAMATA: PAREATIDAE) FROM NORTHERN MYANMAR Section Editor: Olivier S.A. Pauwels Submitted: 01 October 2014, Accepted: 20 November 2014 Gernot Vogel* * Society for Southeast Asian Herpetology, Im Sand 3, D-69115 Heidelberg, Germany E-mail: [email protected] Abstract A new species of the genus Pareas is described from northern Myanmar. It differs from all other known species of the genus by coloration, which is mainly uniform, and its size (one of the largest species in the genus). Furthermore it is characterized by a low number of supralabials (six), a loreal that touches the orbit, presence of a presubocular and absence of a preocular. The new species was found at an elevation of 1890 m a.s.l. and is regarded as an inhabitant of high elevation mountainous areas. Keywords: Asia, Colubroidea, Oriental region, Pareas vindumi sp. nov., taxonomy Introduction The genus Pareas Wagler, 1830 is widely this genus are quite common. Together with the distributed in the Oriental region. Since the monotypic genus Aplopeltura A. Duméril, 1853, description of Pareas nigriceps Guo & Deng, and Asthenodipsas Boie, 1827, with five species 2009 and the revalidation of Pareas chinensis (Loredo et al. 2013), Pareas is included in the (Barbour, 1912) by Guo et al. (2011) the genus family Pareatidae (Pyron et al. 2011). Snakes of currently comprised 11 species. Although there the genus Pareas are mainly arboreal, nocturnal, have been several revisions (Rao & Yang 1992, and feed generally on slugs and snails (Götz, Ota et al. 1997, Guo & Deng 2009, Guo et al. 2002). 2011), its phylogeny is only partially known (Guo et al. 2011). Several species groups of the In 1999, the National Science Foundation genus await clarification of their systematics and funded a joint three-year collaboration between an increase in the species number can be the Nature and Wildlife Conservation Division, expected. Astonishingly, little is known about Forestry Department of Myanmar, the California the natural history of the members of this genus, Academy of Sciences, and the Smithsonian despite the fact that in some areas, species of Institution, to catalogue the amphibian and 01 TAPROBANICA VOL. 07: NO. 01 NEW Pareas FROM MYANMAR reptile species of Myanmar. The core of the covered by the supralabials. The first sublabial project was specimen-based surveys conducted was defined as the scale that starts between the primarily by a trained field team chosen from posterior chin shield and the infralabials and that employees of the Nature and Wildlife borders the infralabials. Values for paired head Conservation Division, Forestry Department. In characters were recorded on both sides of the the course of this project, a large unusual head, and were reported in a left / right order. specimen of the genus Pareas was collected and The sex was determined by dissection of the deposited in the collection of the CAS, which ventral tail base. subsequently herein is described as a new species. Museum abbreviations: BMNH: The Natural History Museum, London, UK; CAS: California Materials and Methods Academy of Sciences, San Francisco, USA; The specimen of the undescribed species was CIB: Chengdu Institute of Biology, Chengdu, compared with a total of 128 preserved People’s Republic of China; DL: Ding Lee’s specimens of all known species of the genera private collection, Chengdu, People’s Republic Pareas, Asthenodipsas and Aplopeltura with the of China; FMNH: Field Museum of Natural exception of Pareas iwasakii from Japan. The History, Chicago, USA; MNHN: Muséum external morphological characters and coloration national d’Histoire naturelle, Paris, France; of all the specimens were examined in detail, MZB: Museum Zoologicum Bogoriense, Bogor, and the examined materials are listed in Java, Indonesia; NMW: Naturhistorisches Appendix 1. Museum Wien, Vienna, Austria; PSGV: Gernot Vogel’s private collection, Heidelberg, A total of 40 morphological characters were Germany; RMNH: Nationaal Natuurhistorisch recorded for each specimen (see Appendix 2). Museum (Naturalis), Leyden, The Netherlands; Not all of these characters were useful to SMF: Natur-Museum und Forschungs-Institut distinguish between species in this study, but all Senckenberg, Frankfurt-am-Main, Germany; of them were compared because they may be of ZFMK: Zoologisches Forschungsmuseum use for further taxonomic studies. Alexander Koenig, Bonn, Germany; ZMA: Zoölogisch Museum Amsterdam, Amsterdam, Measurements were taken with a slide-caliper to The Netherlands; ZMB: Zoologisches Museum the nearest 0.1 mm, except body and tail lengths, für Naturkunde der Humboldt-Universität zu which were measured to the nearest of one Berlin, Berlin, Germany; ZSM: Zoologische millimeter with a measuring tape. The number Staatssammlung, München, Germany. of ventral scales was counted according to Other abbreviations: SVL: Snout–vent length; Dowling (1951). Half ventrals were counted as TaL: Tail length; TL: Total length; Rel TL: one. The first enlarged shield anterior to the Relative tail length TaL/TL, Ve: ventral scales; ventrals was regarded as a preventral and was Sc: subcaudal scales; Lo: loreal scale. present in all examined specimens. The first scale under the tail meeting its opposite was Results regarded as the first subcaudal, and the terminal scute was not included in the number of Pareas vindumi sp. nov. subcaudals. The dorsal scale rows were counted (Figs. 1–3) at one head length behind head, at mid-body, and at one head length before vent. In the Holotype: adult female (527 mm SVL), CAS number of supralabials touching the subocular, 248147 (field number CAS-MHS-28983); those only touching the presubocular were not Chipwi Township, Lukpwi village included. Infralabials were considered being (25°42'41.7996"N, 98°19' 22.7994"E, 1890 m those shields that were completely below a asl), Kachin State, Myanmar, coll. M. Hlaing, S. supralabial and bordering the mouth gap. L. Oo, Z. H. Aung, K. S. Lwin, and Y. M. Win, Usually the last supralabial shield was a very 28 July 2009. large shield, much larger than other supralabials. Smaller shields behind this enlarged shield do Diagnosis: A species of the genus Pareas not border the mouth gap (only the connecting characterized by a large size (in the single muscle) and were excluded in the sublabial known specimen 657 mm); loreal widely scales count, despite the fact that they were touching orbit; vertebral scales smooth and not 02 TAPROBANICA VOL. 07: NO. 01 VOGEL, 2015 enlarged; dorsal scales smooth; 178 ventrals in the sutures of the upper labials and in the the single known female, males unknown; 61 temporal region; lower labials also speckled but subcaudals in the single known female; relative less intensively than supralabials; eye black; TL 0.198 in the single known female; 6 underside of head coloured like ventral side of supralabials with SL 3–4 touching the subocular; the body, also with fine speckles. Venter 6 infralabials, first ones touching behind the whitish-cream with fine specklings, more mental shield; no pre- or postocular, one concentrated to the base of the ventrals. Tail presubocular; 2 anterior temporals; body pattern coloured like body, ventrally heavily speckled. uniform and no markings on the head, no collar. The new species can be diagnosed by its large Distribution and natural history: Pareas size, low number of supralabials and infralabials, vindumi sp. nov. is currently only known by an and unusual uniform pattern for this genus. unique specimen from the Chipwi Township region of Kachin State, Myanmar. It should be Description of the holotype: Female, SVL 527 expected in the surrounding mountainous areas mm; TaL 130 mm; TL 657 mm; Rel TL: 0.198. and in neighboring Republic of China. The Body elongate, laterally compressed; head holotype was found at an elevation of 1,890 m distinct from the neck, snout blunt; eye moderate, a.s.l., at about 9.00 PM. Nothing else was dark. Rostral slightly visible from above; a recorded, but obviously this is a species living at single nasal; two internasals, widely in contact high elevations. No further information is known with each other with a diagonal suture; two large on the biology of this species. irregular pentagonal prefrontals, much larger than internasals and with a slightly diagonal Discussion suture between; one pentagonal-shaped frontal, In Guo & Deng (2009), the new species keys out longer than wide, smaller than parietals; no as P. monticola (Cantor, 1839). The pholidosis preocular; no postoculars; one triangular is most similar to P. boulengeri (Angel, 1920). presubocular, touching second and third However both species have a banded pattern and supralabials, loreal and orbit; one subocular, distinct neck- and head markings as well as surrounding about one third of the eye, touching more supralabials and more infralabials (Figs. 4 the supraocular; 1/1 loreal, broadly touching eye, & 5). I refrain from providing a new key, due to longer than wide, elongated, in contact with the fact that several publications on this genus second supralabial, presubocular, prefrontal, are about to be published and the key would be internasal and nasal; 6/6 supralabials, 3rd and 4th outdated shortly after it is printed. SL touching the subocular, none reaching the eye, 6th by far the largest, elongate; 1/1 Pareas vindumi sp. nov. can be distinguished supraocular; 2/2 anterior temporals and 3/3 from the other members of the genus Pareas as posterior temporals; 6/6 infralabials, 1st pair in follows (values of P. vindumi sp. nov. vs. the contact with each other. Dorsal scales in 15-15- compared species in brackets).
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