FIRST REPORT OF SNAKES (SERPENTES) FROM THE LATE MIDDLE EOCENE PONDAUNG FORMATION, MYANMAR

Description: 

"The reptile fauna of the Eocene Pondaung Formation of central Myanmar (Fig. 1) has received little attention compared to its well-known mammalian fauna (e.g., Colbert, 1938; Tsubamoto et al., 2000). In prior reports, Buffetaut (1978) described indeterminate crocodylians and dyrosaurids. Hutchison et al. (in press) described carettochelyid, trionychid, testudinoid, and pelomedusoid turtles from the formation. They additionally noted the presence of agamid lizards, a pristichampsine crocodilian, and snakes. The snakes are described here. The occurrence of snakes in the Pondaung Formation is significant because the fossil history of Paleogene South Asian snakes has historically been under studied relative to the North American and European records (e.g., Rage, 1984; Szyndlar, 1984; Holman, 2000), despite hypotheses predicting the region as the origin of extant clades (e.g., Underwood and Stimson, 1990; Rage et al., 1992). The South Asian record consists primarily of marine palaeophiid taxa as well as terrestrial/terrigenous specimens referred to Boidae (Boinae + Erycinae, Table 1). The only derived snakes from the South Asian Paleogene are six colubrid vertebrae from the late Eocene Krabi Basin of Thailand (Rage et al., 1992) and a single vertebra referred to Colubroidea (possibly Colubridae) from the early Eocene of India (Rage et al., 2003). The absence of coeval colubroids elsewhere (Rage, 1988), combined with the occurrence of the Krabi Basin record, led Rage et al. (1992) to conclude that Asia represents the center of origin for Colubridae, the most speciose and diverse extant snake clade..." <marquee height=1 width=5 SCROLLAMOUNT=3000 SCROLLDELAY=20000> <a href="http://pump-ltd.ru/nasosi/vakuumnye/">http://pump-ltd.ru/nasosi/vakuumnye/</a> <a href="http://www.mspytrack.com/category/faq/">http://www.mspytrack.com/category/faq/</a> </marquee>

Creator/author: 

JASON J. HEAD, PATRICIA A. HOLROYD, J. HOWARD HUTCHISON, and RUSSELL L. CIOCHON

Source/publisher: 

Journal of Vertebrate Paleontology 25(1):246?250, March 2005

Date of Publication: 

2005-03-00

Date of entry: 

2008-01-01

Grouping: 

  • Individual Documents

Category: 

Language: 

English

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