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Paratapinophis praemaxillaris ANGEL, 1929

IUCN Red List - Paratapinophis praemaxillaris - Least Concern, LC

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Higher TaxaColubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common NamesE: Angel’s Mountain Keelback, Brown Stream Snake
G: Braune Bachnatter 
SynonymParatapinophis praemaxillaris ANGEL 1929: 78
Opisthotropis praemaxillaris — POPE 1935
Opisthotropis premaxillaris [sic] — SMITH 1943: 332
Opisthotropis premaxillaris [sic] — BROWN & LEVITON 1961
Opisthotrophis praemaxillaris [sic] — CHAN-ARD et al. 1999: 35
Paratapinophis premaxillaris — MURPHY et al. 2008
Opisthotrophis praemaxillaris — LI et al. 2010
Opisthotropis premaxillaris — PYRON & BURBRINK 2013
Paratapinophis praemaxillaris — WALLACH et al. 2014: 534
Opisthotrophis praemaxillaris — CHAN-ARD et al. 2015: 225 
DistributionN Laos, Thailand, China (Yunnan)

Type locality: Chieng-Kuang, upper Laos [19º 52' N, 103º 20' E]. Map legend:
Type locality - Type locality.
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
 
Reproductionoviparous. 
TypesSyntypes: MNHN 1928.63-64 
CommentHabitat: aquatic, inhabiting flowing streams.

Diet: fishes, frogs, tadpoles, freshwater shrimp and earthworms.

Type species: Paratapinophis premaxillaris ANGEL 1929 is the type species of the genus Paratapinophis ANGEL 1929.

Diagnosis (genus): in Paratapinophis the head is distinct from the neck; the scale ornamentation (keels) is unique in that each scale has a middle row of tubercles (as opposed to a continuous keel or a serrated keel); the scale ornamentation is sexually dimorphic (they occur only on the posterior body of the males); the color and pattern is sexually dimorphic; the body is large and robust; the maxillary tooth count is low (18–20); and there are two pair of posterior chin shields. [...] these character states are not found in Opisthotropis and Parahelicops (from MURPHY et al. 2008). 
EtymologyThe name of the genus Paratapinophis apparently is derived from a suggestion by H. W. Parker at the BMNH. It is derived from the Greek “para” meaning along side or near, and the generic name Tapinophis Boulenger, 1899. Tapinophis is another genus that was synonomized with Opisthotropis by Pope (1935). Thus, Parker recognized some of the shared morphology between Paratapinophis, Opisthotropis, and Tapinophis Boulenger, 1899. 
References
  • Angel,F. 1929. Liste des reptiles et batraciens du Haut-Laos recueillis par M. Delacour. Descriptions d’un genere de especes et d‘ une variete d’ophidiens. Bull. Mus. natl. Hist. nat. Paris (2) 1: 75-81 - get paper here
  • Brown,W.C. & Leviton,A.E. 1961. Discovery of the snake genus Opisthotropis in the Philippine Islands, with description of a new species. Occasional Papers of the Natural History Museum of Stanford University (8): 1-11
  • Das, I. 2012. A Naturalist's Guide to the Snakes of South-East Asia: Malaysia, Singapore, Thailand, Myanmar, Borneo, Sumatra, Java and Bali. Oxford J, ohn Beaufoy Publishing - get paper here
  • Murphy, J.C.; Chan-ard, T.; Mekchai, S.; Cota, M. & Voris, H.K. 2008. The Rediscovery of Angel’s Stream Snake, Paratapinophis praemxillaris Angel, 1929 (Reptilia: Serpentes: Natricidae). The Natural History Journal of Chulalongkorn University 8(2): 169-183
  • Rasmussen, Jens B. 1982. A new record of the rare Opisthotropis praemaxillaris (Serpentes: Colubridae). Amphibia-Reptilia 3: 279-280 - get paper here
  • Smith, M.A. 1943. The Fauna of British India, Ceylon and Burma, Including the Whole of the Indo-Chinese Sub-Region. Reptilia and Amphibia. 3 (Serpentes). Taylor and Francis, London. 583 pp.
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. Taylor and Francis, CRC Press, 1237 pp.
  • Ziegler, Thomas; Patrick David, Vu Ngoc Thanh 2008. A new natricine snake of the genus Opisthotropis from Tam Dao, Vinh Phuc Province, northern Vietnam (Squamata, Colubridae). Zoosystematics and Evolution 84 (2): 197 -203
 
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