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Conopsis biserialis (TAYLOR & SMITH, 1942)

IUCN Red List - Conopsis biserialis - Least Concern, LC
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Higher TaxaColubridae, Colubrinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Two-lined Mexican Earth Snake
S: Mexicana de Dos Lineas 
SynonymConophis biserialis TAYLOR & SMITH 1942: 333
Conopsis biserialis — LINER 1994
Conopsis biserialis — GOYENECHEA & FLORES-VILLELA 2006
Conopsis biserialis — WALLACH et al. 2014: 181 
DistributionMexico (Distrito Federal, Jalisco, Estado de México, Michoacán, Morelos, and Puebla, Guerrero, Nayarit); elevation 1700 to 3080 m.

Type locality: 10 miles W Villa Victoria, Estado de México.  
Reproductionovovivparous 
TypesType: FMNH 100062 
DiagnosisDiagnosis: This species is characterized by the following combination of characters: divided internasals and prefrontals; brown-gray dorsal coloration, and two series of dots along body, or a tessellated pattern of dorsal spots. Ventrally it is yellowish with a series of black dots medially. Conopsis biserialis can be distinguished from other species in the genus by its characteristic dorsal spots pattern. Conopsis biserialis shares its characteristic dorsal pattern of spots with Conopsis amphisticha, with which it can be confused, but their geographic ranges do not overlap. 
CommentDistribution: reports from Hidalgo appear to be erroneous (Lemos-Espinal & SMith 2015). Not in Guanajuato fide Leyte-Manrique et al. 2022. 
EtymologyNamed after Latin bisrialis, having two rows or series. [“...Back with a paired series of dorsal marks or transverse, tessellated marks...”]. 
References
  • Canseco-Márquez, L., & Gutiérrrez-Mayén, M.G. 2010. Anfibios y reptiles del Valle de Tehuacán-Cuicatlán. Comisión Nacional para el conocimiento y uso de la biodiversidad, México D.F., Mexico, 302 pp - get paper here
  • Castaneda-Gonzalez, Oiva; Javier Manjarrez, Irene Goyenechea, and Victor Fajardo 2011. Ecology of a Population of the Earthsnake Conopsis biserialis in the Mexican Transvolcanic Axis. Herp. Cons. Biol. 6 (3) - get paper here
  • Castro-Franco, Rubén, María Guasalupe Bustos-Zagal 1994. List of reptiles of Morelos, Mexico, and their distribution in relation to vegetation types. Southwestern Naturalist 39 (2): 171-175 - get paper here
  • Davis, William B.; Smith, Hobart M. 1953. Snakes of the Mexican state of Morelos. Herpetologica 8: 133-149 - get paper here
  • Goyenechea, Irene & Flores-Villela, Oscar 2002. Taxonomic status of the snake genera Conopsis and Toluca (Colubridae). Journal of Herpetology 36 (1): 92-95 - get paper here
  • Goyenechea, IRENE & OSCAR FLORES-VILLELA 2006. Taxonomic summary of Conopsis, Günther, 1858 (Serpentes: Colubridae). Zootaxa 1271: 1–27 - get paper here
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp
  • Lemos-Espinal JA, Smith GR 2020. A conservation checklist of the amphibians and reptiles of the State of Mexico, Mexico with comparisons with adjoining states. ZooKeys 953: 137-159 - get paper here
  • Lemos-Espinal JA, Smith GR 2020. A conservation checklist of the amphibians and reptiles of Mexico City, with comparisons with adjoining states. ZooKeys 951: 109-131 - get paper here
  • Lemos-Espinal JA, Smith GR 2020. A conservation checklist of the herpetofauna of Morelos, with comparisons with adjoining states. ZooKeys 941: 121-144 - get paper here
  • Lemos-Espinal JA, Smith GR, Pierce LJS, Painter CW 2020. The amphibians and reptiles of Colima, Mexico, with a summary of their conservation status. ZooKeys 927: 99-125 - get paper here
  • Palacios-Aguilar, Ricardo & OSCAR FLORES-VILLELA 2018. An updated checklist of the herpetofauna from Guerrero, Mexico. Zootaxa 4422 (1): 1-24 - get paper here
  • Raya-García, E., & Arteaga-Tinoco, I. 2024. Rural occupancy in a montane burrowing snake: the importance of thermal and microhabitat resources during the rainy season. Biologia, 1-8 - get paper here
  • Raya-Garcia, E., Alvarado-Diaz, J., Suazo-Ortuno, I. and Lopez-Toledo, L. 2020. Chemosensory responses in newborns of the fossorial earthsnake Conopsis biserialis (Serpentes: Colubridae) to potential invertebrate prey scents. Salamandra 56: 87-90. - get paper here
  • Raya-García, E., et al. 2017. Conopsis biserialis and C. nasus (Mexican Earthsnakes) probing. Herpetological Review 48 (2): 376-377 - get paper here
  • Raya-García, E., J. Alvarado-Díaz & I. Suazo-Ortuño 2016. Litter size and relative clutch mass of the earthsnakes Conopsis biserialis and C. nasus (Serpentes: Colubridae) from the central Mexican Transvolcanic Axis. Salamandra 52 (2): 217-220 - get paper here
  • Raya-García, Ernesto; Javier Alvarado-Díaz, and José Martín 2019. Foraging Cues and Thermal Environments Influence Retreat Site Selection in Fossorial Earthsnakes. Herp. Conserv. Biology 14 (3): 560–567 - get paper here
  • Raya-García, Ernesto; Javier Alvarado-Díaz, Ireri Suazo-Ortuño 2020. Influence of Prey Scent on Chemosensory Behavior of Two Fossorial Earthsnakes: Conopsis biserialis and Conopsis nasus (Serpentes: Colubridae). Journal of Herpetology 54 (4): 460-464 - get paper here
  • Sunny, A., Manjarrez, J., Caballero-Viñas, C. et al. 2023. Modelling the effects of climate and land-cover changes on the potential distribution and landscape connectivity of three earth snakes (Genus Conopsis, Günther 1858) in central Mexico. Sci Nat 110: 52 - get paper here
  • Taylor, Edward H. & Smith,H.M. 1942. The snake genera Conopsis and Toluca. Univ. Kansas Sci. Bull. 28 (15): 325-363 - 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.
  • Woolrich-Piña, G. A., E. García-Padilla, D. L. DeSantis, J. D. Johnson, V. Mata-Silva, and L. D. Wilson 2017. The herpetofauna of Puebla, Mexico: composition, distribution, and conservation status. Mesoamerican Herpetology 4(4): 791–884 - get paper here
 
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