Atractus hostilitractus MYERS, 2003
Can you confirm these amateur observations of Atractus hostilitractus?
|Higher Taxa||Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Synonym||Atractus hostilitractus MYERS 2003|
Atractus hostilitractus — WALLACH et al. 2014: 73
Type locality: ‘‘Morti Hydro’’ [about 100–200 m elevation, at 8°52’28’’N, 77°54’19’’W], Río Mortí, Province of Darién, Panama.
|Types||Holotype: AMNH 130330|
|Diagnosis||DIAGNOSIS: Atractus hostilitractus is characterized by a distinctive, complex color pattern, the irregularity of which gives the appearance of possibly being highly variable in life. The holotype of A. darienensis has similar numbers of ventrals and subcaudals and seems arguably closest to hostilitractus in general color pattern, but pronounced differences in snout shape are strong evidence that these snakes are not color morphs of a single species. The close proximity of the loreal and internasal (in narrow contact in the holotype) may also be a distinctive feature of A. hostilitractus. The wide-spaced bars in the posterior dorsal pattern of A. hostilitractus, and the presence of a black vertebral streak, are suggestive of the red and black A. schach of Surinam and Brazil, but that is a smaller snake (<300 mm total length) which does not have the neck conspicuously different from the body (save for one wider saddle) and which has less black pigmentation ventrally (Hoogmoed, 1980: 31). The color pattern of A. hostilitractus also is suggestive of the Andean A. sanguineus and A. wagleri (and perhaps A. andinus as well), as based on poorly reproduced photographs and brief type descriptions (Prado, 1944, 1945, also 1946).9 But compared with hostilitractus, those species have relatively longer tails (12.9–13.7% of total length), many more black bars, and little differentiation between neck and body patterns.|
|Etymology||Named after the Latin hostilis (hostile) and the noun tractus (region or territory). The associative implication is to the 19th- and early 20th-century history of a part of the Panamanian interior that includes the Río Mortí.|