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Tachymenoides affinis BOULENGER, 1896

IUCN Red List - Tachymenoides affinis - Least Concern, LC
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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Boulenger's Slender Snake 
SynonymTachymenis affinis BOULENGER 1896: 119
Tachymenis affinis — WALKER 1945: 22
Tachymenis affinis — PETERS & OREJAS-MIRANDA 1970: 289
Tachymenis affinis — LEHR 2002: 96
Tachymenis affinis — WALLACH et al. 2014: 695
Tachymenoides affinis — TREVINE et al. 2022
Tachymenoides affinis — LEHR et al. 2025 
DistributionPeru (Huánuco, Amazonas)

Type locality: Muña, Peru  
Reproductionovoviviparous 
TypesHolotype: BMNH 1946.1.2.80 
DiagnosisDiagnosis (genus): “Smooth dorsal scales in 17/17/15 rows; apical pit absent; preocular one, maxillary teeth 7−13 and dentary teeth 10−16; hemipenis with large calyces restricted to the capitulum on the asulcate side (Fig. S11); maximum SVL 436 mm.”


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CommentVenomous!

Walker (1945: 22) suggests that the type locality is on upper Río Huallaga, Huanuco, Peru.

Type species: Tachymenis affinis BOULENGER 1896: 119 is the type species of the genus Tachymenoides TREVINE et al. 2022. 
EtymologyNamed after Latin affinis, related, akin, connected. [“...Very closely allied to the preceding (i.e., Tachymenis peruviana)...”]. (from Esteban Lavilla, pers. comm., May 2024)

The genus was named after Latin Tachymenis, snake genus due to Wiegmann, 1835 (see) + Latin oides, resembling, having the form of. 
References
  • Boulenger, G.A. 1896. Catalogue of the snakes in the British Museum, Vol. 3. London (Taylor & Francis), xiv + 727 pp. - get paper here
  • Chávez, Germán 2011. Tachymenis affinis Boulenger, 1896 (Squamata: Colubridae): distribution extension in Perú. Herpetotropicos 7 (1-2): - get paper here
  • Lehr, E. 2002. Amphibien und Reptilien in Peru. Natur und Tier-Verlag (Münster), 208 pp. - get paper here
  • Lehr, Edgar; Jiří Moravec, Mikael Lundberg, Gunther Köhler, Alessandro Catenazzi & Jiří Šmíd, 2019. A new genus and species of arboreal lizard (Gymnophthalmidae: Cercosaurinae) from the eastern Andes of Peru. Salamandra 55 (1): 1–13 - get paper here
  • 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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