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Trimetopon viquezi DUNN, 1937

IUCN Red List - Trimetopon viquezi - Critically Endangered, CR
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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Viquez's Tropical Ground Snake 
SynonymTrimetopon viquezi DUNN 1937
Trimetopon viquezi — PETERS & OREJAS-MIRANDA 1970: 309
Trimetopon viquezi — SAVAGE 2002: 639
Trimetopon viquezi — WALLACH et al. 2014: 744 
DistributionCosta Rica

Type locality: Siquirres, Costa Rica.  
Reproductionoviparous 
TypesHolotype: lost (fide Savage 2002), ERD (formerly MNCR, fide Wallach et al. 2014, who did not explain what “ERD” is), “A male, sent me by the Museo Nacional de Costa Rica, collected by Dr. C. Viquez.” (fide DUNN 1937) 
DiagnosisDiagnosis: Dark dorsal stripes, a red venter, and the absence of light nuchal spots or a collar will separate this form from all other small Costa Rican snakes (Savage 2002: 639). 
CommentSIMILAR SPECIES: (1) Trimetopon slevini has light nuchal spots. (2) All other Trimetopon have light nuchal markings and a yellowish to white venter. (3) Tantilla vermiformis has a single middorsal dark stripe and light-colored parietal tips (Savage 2002: 639).

Abundance: Rare. This is one of the species called 'lost' and 'rediscovered' by Lindken et al. 2024. 
EtymologyNamed after the collector of the type, Dr. C. Viquez. 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Dunn, Emmett Reid 1937. New or Unnamed Snakes from Costa RicaNew or Unnamed Snakes from Costa Rica. Copeia 1937 (4): 213- 215 - get paper here
  • Lindken T.; Anderson, C. V., Ariano-Sánchez, D., Barki, G., Biggs, C., Bowles, P., Chaitanya, R., Cronin, D. T., Jähnig, S. C., Jeschke, J. M., Kennerley, R. J., Lacher, T. E. Jr., Luedtke, J. A., Liu, C., Long, B., Mallon, D., Martin, G. M., Meiri, 2024. What factors influence the rediscovery of lost tetrapod species? Global Change Biology, 30: 1-18 - get paper here
  • Peters, James A.; Donoso-Barros, Roberto & Orejas-Miranda, Braulio 1970. Catalogue of the Neotropical Squamata: Part I Snakes. Bull. US Natl. Mus. 297: 347 pp. - get paper here
  • Savage, J. M., & VILLA, J. 1986. An Introduction to the Herpetofauna of Costa Rica. Soc. Stud. Amphib. Rept. Contrib. Herpetol. No. 3, viii + 207 pp.
  • Savage, J.M. 2002. The Amphibians and Reptiles of Costa Rica: A Herpetofauna Between Two Continents, Between Two Seas. University of Chicago Press, 934 pp. [review in Copeia 2003 (1): 205]
  • Solorzano, A. 2004. Serpientes de Costa Rica - Snakes of Costa Rica. Editorial INBio, Costa Rica, 792 pp.
  • Taylor,E.H. 1951. A brief review ot the snakes of Costa Rica. Univ. Kansas Sci. Bull. 34 (1): 3-188 - 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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