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Anomalepis mexicana JAN, 1860

IUCN Red List - Anomalepis mexicana - Data Deficient, DD
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Higher TaxaAnomalepididae, Typhlopoidea, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Mexican Blind Snake 
SynonymAnomalepis mexicanus JAN in JAN & SORDELLI 1860-1866
Anomalepis mexicana — BOULENGER 1893: 58
Anomalepis dentatus TAYLOR 1939: 90
Anomalepis dentatus — TAYLOR 1951: 24
Anomalepis mexicanus — PETERS & OREJAS-MIRANDA 1970: 20
Anomalepis mexicanus — SMITH & SMITH 1976
Anomalepis mexicanus — MCDIARMID, CAMPBELL & TOURÉ 1999: 48
Anomalepis mexicanus — SAVAGE 2002
Anomalepis mexicanus — MCCRANIE 2011: 40
Anomalepis mexicanus — MCCRANIE 2015
Anomalepis mexicanus — WALLACH et al. 2014: 43
Anomalepis mexicana — BÖHME & DENZER 2019
Anomalepis mexicanus — SUNYER & MARTÍNEZ-FONSECA 2023 
DistributionNicaragua, Honduras, Costa Rica, Panama, Colombia (Bolívar), possibly Peru (fide Kofron 1988)

Type locality: see comment

dentatus: Panama; Type locality: Barro Colorado Island.  
Reproductionoviparous 
TypesHolotype: unlocated, MSNM (Milano, unknown fide Kofron 1988)
Holotype: MCZ 29220 [Anomalepis dentatus] 
DiagnosisDiagnosis (genus): The blind worm snakes of this genus (four species) share the following diagnostic features that will separate them from the other three genera in the family: enlarged head scales, with those on the upper head surface forming polygonal plates; prefrontal plates meet on the midline to prevent any contact between the rostral and prefrontal; a roughly pentagonal frontal, with an ovate posterior margin. In addition there are 22 to 28 scale rows around the middle of the body, and the tail has a terminal spine. Typhlophis differs from Anomalepis by having small cycloid scales on the upper head surface so that prefrontal and frontal plates are not distinctive, but the tail terminates in a spine (Savage 2002: 553).


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CommentDistribution: The type locality (”Mexico”) is in error fide Kofron 1988. Not listed in LINER 1994.

This species has been known from only the type (fide TAYLOR 1939).

Type species: Anomalepis mexicanus JAN in JAN & SORDELLI 1860-1866 is the type species of the genus Anomalepis JAN 1860. The genus is also the type genus of the family Anomalepididae.

Phylogenetics: Miralles et al. 2018 showed that the Anomalepididae is a member of the Alethinophidia, not the Scolecophidia as previously thought. 
EtymologyNamed after the (erroneous) occurrence in Mexico (the original type locality).

The genus was named after the anomalous scales, Greek “lepis” (= scale). Genus names ending in -lepis are feminine (Böhme & Denzer 2019), hence the name needs to be mexicana. 
References
  • Bernal, R. 2025. Serpientes de Colombia-Guía de Campo. Serie de Guías Tropicales de Campo. 19: 396 pp. Conservación Internacional Colombia, Bogotá - get paper here
  • Böhme, W. & Denzer, W. 2019. Warum die Endungen adjektivischer Artnamen dem Geschlecht der Gattungsnamen angepasst werden müssen Sauria 41 (1): 55–62 - get paper here
  • Boulenger, G.A. 1893. Catalogue of the snakes in the British Museum (Nat. Hist.) I. London (Taylor & Francis), 448 pp. - get paper here
  • Carvajal-Cogollo, J.E.; L.E. Rojas-Murcia. & G. Cárdenas-Arévalo 2020. Reptiles del Caribe colombiano/ Reptiles of the Colombian Caribbean. Tunja: Editorial UPTC, 268 pp. - get paper here
  • González J, Medina-Rangel GF, Rojas-Murcia LE 2018. The first country record of the Mexican Blind Snake, Anomalepis mexicanus Jan, 1860 (Serpentes, Anomalepididae), in Colombia. Check List 14(6): 1047-1052 - get paper here
  • Jan, G. 1860. Iconographie générale des ophidiens. 1. Livraison. J.B. Bailière et Fils, Paris - get paper here
  • Kofron, C. 1988. The central and south-american blindsnakes of the genus Anomalepis. Amphibia-Reptilia 9: 7-14 - get paper here
  • Köhler, G.; Quintana, A.Z.; Buitrago, F. & Diethert H. 2004. New and noteworthy records of amphibians and reptiles from Nicaragua. Salamandra 40 (1): 15-24 - get paper here
  • Liner, E.A. 1994. Scientific and common names for the Amphibians and Reptiles of Mexico in English and Spanish. Herpetological Circular 23: 1-113
  • Marx,H. 1953. A new worm snake from Colombia, genus Anomalepis. Fieldiana: Zoology 34: 197-198 - get paper here
  • McCranie, James R. 2015. A checklist of the amphibians and reptiles of Honduras, with additions, comments on taxonomy, some recent taxonomic decisions, and areas of further studies needed. Zootaxa 3931 (3): 352–386 - get paper here
  • McDiarmid, R.W.; Campbell, J.A. & Touré,T.A. 1999. Snake species of the world. Vol. 1. [type catalogue] Herpetologists’ League, 511 pp.
  • Miralles, A. , Marin, J. , Markus, D. , Herrel, A. , Hedges, S. B. and Vidal, N. 2018. Molecular evidence for the paraphyly of Scolecophidia and its evolutionary implications. J. evol. Biol., doi: 10.1111/jeb.13373 - get paper here
  • Ray, Julie M. and Patty Ruback 2015. Updated checklists of snakes for the provinces of Panamá and Panamá Oeste, Republic of Panama. Mesoamerican Herpetology 2 (2): 168-188 - get paper here
  • Sasa, M., Arias, E., & Chaves, G. 2025. Annotated list of amphibians and reptiles of Costa Rica: The role of the Museum of Zoology in cataloging the country’s herpetological diversity. Revista de Biología Tropical, 73(S2): e64536-e64536 - get paper here
  • 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.
  • Stickel, A.L., Abarca, J.G. & Pounds, J.A. 2017. Geographic Distribution: Anomalepis mexicanus (Mexican Blind Snake). Herpetological Review 48 (3): 589. - get paper here
  • Sunyer, Javier 2014. An updated checklist of the amphibians and reptiles of Nicaragua. Mesoamerican Herpetology 1 (2): 186–202. - get paper here
  • Sunyer, Javier & José́ Gabriel Martínez-Fonseca 2023. An updated country checklist to the amphibians and reptiles of Nicaragua. REVISTA NICARAGÜENSE DE BIODIVERSIDAD (100): 1-25 - get paper here
  • Taylor,E.H. 1939. Two new species of the genus Anomalepis Jan, with a proposal of a new family of snakes. Proc. New England zool. Club 17: 87-96
  • 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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