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Tachymenis attenuata WALKER, 1945

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
SubspeciesTachymenis attenuata attenuata WALKER 1945
Tachymenis attenuata boliviana WALKER 1945 
Common NamesE: Walker's Slender Snake 
SynonymTachymenis attenuata WALKER 1945: 24
Tachymenis attenuata attenuata — MARX 1958
Tachymenis attenuata — WALLACH et al. 2014: 695

Tachymenis attenuata boliviana WALKER 1945
Tachymenis attenuata boliviana — GOLAY 1993: 17 
DistributionBolivia, S Peru

Type locality: Peru (Dep. Madre de Dios fide Walker 1945)  
Reproductionviviparous 
TypesHolotype: FMNH 40071
Holotype: AMNH 36020, collected by J. Steinbach [boliviana] 
DiagnosisDiagnosis. It is a Tachymenis differing from members of the peruviana complex primarily in its more attenuate body proportions. This results in a greater number of caudals and total ventrals, and in a greater ratio of tail length to total length. Other differences can be found in the condition of the hemipenis, and in the dentition. All of these have been discussed in the introduction. This race differs from bolitiana, to be described, in having a slightly lower number of solid maxillary teeth (12-14 as opposed to 14-16), and of abdominals and caudals (in males 148-150 and 60-64 as opposed to 152 and 69), and in having a speckled instead of a checkered color pattern (Walker 1945: 24).

Diagnosis (boliviana). It is a Tachymenis which resembles a. attenuata very
closely. It differs primarily in coloration, but this is supplemented by slight differences in the number of solid maxillary teeth, abdominals, and caudals (Walker 1945: 24). 
CommentVenomous!

Distribution: This species has been reported from Peru, but without specific locality (T. Doan, pers. comm. 30 Apr 2012). 
References
  • Walker, W.F. 1945. A Study of the Snake, Tachymenis peruviana Wiegmann AND ITS Allies. Bull. Mus. Comp. Zool. Harvard 96: 1-56 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
 
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