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Geophis laticollaris SMITH, LYNCH & ALTIG, 1965

IUCN Red List - Geophis laticollaris - Data Deficient, DD

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesE: Widecollar Earth Snake
S: Minadora de Collar Ancho
E: Red Earth Snake [russatus]
S: Minadora de Roja [russatus] 
SynonymGeophis laticollaris SMITH, LYNCH & ALTIG 1965
Geophis sallaei russatus SMITH & WILLIAMS 1966
Geophis russatus — DOWNS 1967: 138
Geophis sallaei — DOWNS 1967: 168
Geophis laticollaris — LINER 1994
Geophis russatus — LINER 1994
Geophis russatus — WILSON & TOWNSEND 2007: 17
Geophis laticollaris — WILSON & TOWNSEND 2007: 13
Geophis laticollaris — WALLACH et al. 2014: 303
Geophis russatus — WALLACH et al. 2014: 305
Geophis laticollaris — PALACIOS-AGUILAR et al. 2022 
DistributionMexico (Oaxaca)

Type locality: Three miles south of Putla, Oaxaca, Mexico.

russatus: Mexico (Oaxaca: Sierra de Miahuatlán); Type locality: La Concepción, near Putla, Oaxaca, México.  
TypesHolotype: INHS (= UIMNH) 57170, adult female collected 29 June 1964 by R. Altig.
Holotype: INHS (= UIMNH) 61409, adult male collected 25 May 1965 by T. MacDougall [russatus] 
DiagnosisDefinition and Diagnosis. No anterior temporal; scales in 15 rows, weakly keeled posteriorly; internasals present; ventrals 132, caudals 30; black above, white below, except for a broad white collar on neck and rear of head. Most similar to G. sallaei, but different in having a nuchal collar and a smaller eye (Smith et al. 1965).

Coloration: Dorsal surface dark, nearly black medially, browner on sides, pigment extending on to ends of ventrals; scales in first row with light, unpigmented areas only on neck, to a distance no more than 20 mm. posterior to head; top and sides of head uniformly dark, to lip; lower labials, mental and anterior chinshields with irregularly distributed pigmented areas; venter white, unpigmented; subcaudal surface extensively pigmented, uniformly dark on posterior fourth; an unpigmented area on posterior central edge of each divided subcaudal, large on anterior scales, disappearing on posterior scales (Smith et al. 1965). 
CommentSynonymy: Geophis russatus was considered as synonym of G. laticollaris by Pavón-Vázquez et al. (2011) and Heimes 2016: 244. This was confirmed by Palacios-Aguilar et al. 2022. Geophis laticollaris was synonymized with G. sallaei by Downs (1967), but later resurrected by Smith & Chiszar (1992) after examining materials acquired subsequent to publication of Downs’ work. 
  • Casas-Andreu, G., F.R. Méndez-De la Cruz and X. Aguilar-Miguel. 2004. Anfibios y Reptiles; pp. 375–390, in A.J.M. García-Mendoza, J. Ordoñez and M. Briones-Salas (ed.). Biodiversidad de Oaxaca. Instituto de Biología, UNAM-Fondo Oaxaqueño para la Conservación de la Naturaleza-World Wildlife Fund, México, D. F.
  • Downs, F. L. 1967. lntrageneric relations among colubrid snakes of the genus Geophis Wagler. Misc. Publ. Mus. Zool. Univ. Michigan 131: 1-193. - get paper here
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp
  • Mata-Silva, Vicente, Jerry D. Johnson, Larry David Wilson and Elí García-Padilla. 2015. The herpetofauna of Oaxaca, Mexico: composition, physiographic distribution, and conservation status. Mesoamerican Herpetology 2 (1): 6–62 - get paper here
  • Palacios-Aguilar, Ricardo; Víctor H. Colín-Martínez, Salvador Hernández- Rubio, Luis Canseco-Márquez, Adrián Nieto-Montes de Oca & Leticia M. Ochoa-Ochoa 2021. Another case of colour pattern polymorphism in Earth Snakes of the genus Geophis (Dipsadidae) from southern Mexico. Journal of Natural History, 55 (47-48): 2985-2997 - get paper here
  • Smith, H.M. & Chiszar, D. 1992. A second locality for Geophis sallei (Reptilia: Serpentes). Bull. Maryland Herp. Soc. 28: 16–18. - get paper here
  • Smith, Hobart M. & Williams, Keneth L. 1966. A new snake (Geophis) from México. Journal of the Ohio Herpetological Society 5 (3): 90-92 - get paper here
  • Smith, Hobart M.; Lynch, John D. & Altig, Ronald 1965. New and notworthy herpetozoa from southern Mexico. Natural History Miscellanea (180): 1-4
  • 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.
  • WILSON, L.D. & J.H. TOWNSEND 2007. A checklist and key to the snakes of the genus Geophis (Squamata: Colubridae: Dipsadinae), with commentary on distribution and conservation. Zootaxa 1395: 1-31 - get paper here
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