Showing posts with label Author: Tri Ngo Van. Show all posts
Showing posts with label Author: Tri Ngo Van. Show all posts

Thursday, February 21, 2013

[Herpetology • 2013] Cyrtodactylus dati • a new forest dwelling Bent-toed Gecko (Squamata: Gekkonidae) from southern Vietnam


Cyrtodactylus dati Tri, 2013

Abstract

A new species of Bent-toed Gecko, Cyrtodactylus dati sp. nov. is described from the secondary evergreen forests of Bu Dop District, Binh Phuoc Province, Vietnam. It differs from all other species of Indochinese and Thai-Malay Cyrtodactylus by having a maximum SVL of 70.1 mm (n=6); no distinct dark blotches on the head in adults; no continuous nuchal loop; a blotched dorsal pattern; 17–19 interorbital scales across the frontal bone; 23–26 scales in a straight line between eye and nostril; 42–48 rows of ventral scales between ventrolateral folds; 20–22 irregular, longitudinal rows of keeled tubercles at midbody between the ventrolateral folds; a series of five or six precloacal pores medially interrupted by one poreless scale in males; three or four femoral pores on each thigh in males; 4–7 enlarged scales beneath thighs; 12–13 subdigital lamellae on first toe; 18–19 subdigital lamellae on fourth toe; and small subcaudal scales.

Keywords: Cyrtodactylus, Gekkonidae, description, new species, southern Vietnam




 Tri Ngo Van. 2013. Cyrtodactylus dati, a new forest dwelling Bent-toed Gecko (Squamata: Gekkonidae) from southern Vietnam. Zootaxa. 3616 (2): 151–164. DOI: 10.11646/zootaxa.3616.2.4

Khám phá thêm một loài thằn lằn chân ngón mới

Monday, December 17, 2012

[Herpetology • 2011] Cyrtodactylus cucphuongensis | Cúc Phương Bent–toed Gecko • A new karstic cave-dwelling Cyrtodactylus Gray (Squamata: Gekkonidae) from Ninh Binh province, northern Vietnam

Cyrtodactylus cucphuongensis Tri & Onn, 2011 

Abstract
A new species of bent-toed gecko, Cyrtodactylus cucphuongensis sp. nov. is described from the karst forest of Cuc Phuong National Park, Ninh Binh province, Northern Vietnam. It differs from all other species of Indo-Chinese Cyrtodactylus by the following combination of characters: SVL 96.0 mm; absence of precloacal and femoral pores; 19 subdigital lamellae on first toe, 24 on fourth toe; large, dark spots on top of head; wide, prominent nuchal band; and five or six dark, irregular, broad bands between limb insertions. 

Key words:  Cyrtodactylus, Gekkonidae, description, new species, Cuc Phuong National Park, Ninh Binh


Etymology. The specific epithet is named after the Cúc Phương National Park. Suggested common name: Cúc Phương Bent–toed Gecko; Vietnamese name: Thằn lằn chân ngón Cúc Phương.

Distribution: northern Vietnam (Ninh Binh) 
Type locality: karst outcrops adjacent to the main road in Cuc Phuong National Park, Nho Quan district, Ninh Binh province, Northern Vietnam (20°15.324’N, 105°38.060’E) at 100 m elevation.


Tri N.V. & Onn C.K. 2011. A new karstic cave-dwelling Cyrtodactylus Gray (Squamata: Gekkonidae) from Northern Vietnam. Zootaxa. 3125: 51–63.

[Herpetology • 2011] Cyrtodactylus martini • another new karst-dwelling Crytodactylus Gray, 1827 (Squamata: Gekkonidae) from Northwestern Vietnam


Cyrtodactylus martini Tri, 2011
Martin’s Bent–toed Gecko

Abstract
A new species of karst–dwelling bent–toed gecko, Cyrtodactylus martini sp. nov., is described from the isolated karst formations of the Hoang Lien Son Mountain range in northwestern Vietnam. It differs from all other congeners by the presence of symmetrical or subsymmetrical reticulations on top of head; no nuchal loop; four precloacal pores separated medially by one poreless scale; 14–18 enlarged femoral scales beneath thighs continuous with precloacal scales; four to six irregular, narrow, yellowish–white bands on dorsum between limb insertions; and six or seven incomplete white rings on tail.
Key words: Cyrtodactylus, Gekkonidae, description, new species, Northern Vietnam

Etymology. The specific epithet honors Mr. Shaun Martin, the Director of Education Program for Nature— WWF in the U.S.A. who sponsored a small grant in 2009 for gecko expeditions in Vietnam.

Tri, N.V. 2011. Cyrtodactylus martini, another new karst-dwelling Crytodactylus Gray, 1827 (Squamata: Gekkonidae) from Northwestern Vietnam. Zootaxa. 2834: 33–46.

Sunday, September 30, 2012

[Herpetology • 2011] Gekko canaensis | Cà Ná Marbled Gecko • a new gecko (Squamata: Gekkonidae) from Southern Vietnam


Cà Ná Marbled Gecko | Gekko canaensis Ngo & Gamble, 2011
Gekko canaensis sp. nov. A: Holotype UNS 0538 in situ; B: paratype UNS 0539 showing a light color;

Abstract
A new species of Gekko Laurenti 1768 is described from southern Vietnam. The species is distinguished from its congeners by its moderate size: SVL to maximum 108.5 mm, dorsal pattern of five to seven white vertebral blotches between nape and sacrum and six to seven pairs of short white bars on flanks between limb insertions, 1–4 internasals, 30–32 ventral scale rows between weak ventrolateral folds, 14–18 precloacal pores in males, 10–14 longitudinal rows of smooth dorsal tubercles, 14–16 broad lamellae beneath digit I of pes, 17–19 broad lamellae beneath digit IV of pes, and a single transverse row of enlarged tubercles along the posterior portion of dorsum of each tail segment. 

Key words: Cà Ná Cape, description, Gekko, Gekko canaensis sp. nov., Gekkonidae, granitic outcrop, Vietnam

Introduction
Members of the Gekko petricolus Taylor 1962 species group (sensu Panitvong et al. 2010) are rock-dwelling specialists occurring in southeastern Indochina. The group as currently described consists of eight described species: 

Gekko badenii Szczerbak & Nekrasova 1994; Gekko grossmanni Günther 1994; Gekko lauhachindai Panitvong et al. 2010; Gekko petricolus Taylor 1962; Gekko russelltraini Ngo et al. 2009; Gekko scientiadventura Rösler et al. 2005; Gekko takouensis Ngo & Gamble 2010; and Gekko vietnamensis Nguyen 2010

Here we report a new species of large-bodied gecko in the Gekko petricolus species group from Cà Ná Cape, an isolated mountain in southern Vietnam.


Etymology. The epithet is derived from the Cà Ná Cape where the type specimens were collected.


FIGURE 5. Map of Southeast Asia indicating the type localities of all described members of the Gekko petricolus species group. The type locality of Gekko canaensis sp. nov., in Ninh Thuan province is indicated by a filled circle.

van Tri, Ngo & Gamble, T. 2011. Gekko canaensis sp. nov. (Squamata: Gekkonidae), a new gecko from Southern Vietnam. Zootaxa. 2890: 53–64

[Herpetology • 2010] Gekko takouensis • A new species of Gekko (Squamata: Gekkonidae) from Tà Kóu Nature Reserve, Binh Thuan Province, Southern Vietnam


Gekko takouensis

Abstract
A new species of Gekko Laurenti is described from Tà Kóu Mountain, an isolated granitic peak in Tà Kóu Nature Reserve, Ham Thuan Nam district, Binh Thuan province, southern Vietnam. The species is distinguished from its congeners by its moderate size, with snout to vent length (SVL) reaching a maximum 107.0 mm; dorsal pattern of 5–8 white vertebral blotches between the nape and sacrum and 6–8 pairs of short white bars on the flanks; 11–14 precloacal pores in males; 14–17 longitudinal rows of smooth dorsal tubercles; and 18–20 broad lamellae beneath the fourth toe. Gekko takouensis sp. nov. is the second endemic gekkonid discovered in the Tà Kóu Nature Reserve, Cyrtodactylus takouensis Ngo & Bauer being the first.

Key words: Conservation, Gekko takouensis sp. nov., granitic outcrop, Tà Kóu Mountain, Vietnam


Ngo, V.T. & Gamble, T. 2010. A new species of Gekko (Squamata: Gekkonidae) from Tà Kóu Nature Reserve, Binh Thuan Province, Southern Vietnam. Zootaxa. 2346, 17–28.

Friday, June 24, 2011

[Herpetology • 2010] Leiolepis ngovantrii • asexual Butterfly lizard endemic to southern Vietnam | Who’s your mommy? Identifying Maternal Ancestors of Asexual Species of Leiolepis Cuvier, 1829 and the Description of a new Endemic Species of Asexual Leiolepis from southern Vietnam



Ngo Van Tri's Lady Butterfly Lizard
Leiolepis ngovantrii Grismer & Grismer 2010

Abstract
 A new asexual species of Leiolepis is described from Binh Chau – Phuoc Buu Nature Reserve, Xuyen Moc district Ba Ria-Vung Tau Province, Vietnam to where it is believed to be endemic. Leiolepis ngovantrii sp. nov. differs from all sexual species of Leiolepis by lacking males and from all asexual species by having nine rows of enlarged keeled scales across the forearm and 37–40 subdigital lamellae beneath the fourth toe. Phylogenetic inference based on 700 base pairsof the mitochondrial ND2 region, placed L. ngovantrii sp. nov. among the currently described asexual species and was used to assess the maternal ancestors of the remaining asexual species. Both maximum parsimony and maximum likelihood analyses recovered L. guttata as the maternal ancestors of L. guentherpetersi, L. boehmei, and L. ngovantrii sp. nov., and L. boehmei as the maternal ancestor to L. triploida.

Key words: asexual, Leiolepis, maternal, ngovantrii, new species, taxonomy, Vietnam


Distribution of all species of Leiolepis: with colored circles representing the samples used in the phylogenetic analysis. * indicate asexual species.


Maternal Ancestors: Leiolepis ngovantrii (a) and the maternal ancestors: L. guttata; (b) female, (c) male – from Binh Chau – Phuoc Buu Nature Reserve, Ba Ria Vung Tau Province, Vietnam.





Grismer, J.L. and Grismer, L.L. 2010. Who’s your mommy? Identifying maternal ancestors of asexual species of Leiolepis Cuvier, 1829 and the description of a new endemic species of asexual Leiolepis Cuvier, 1829 from Southern Vietnam. Zootaxa. 2433: 47–61. http://www.mapress.com/zootaxa/2010/f/z02433p061f.pdf

New species of self-cloning lizard a treat for Vietnamese diners Special