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Scincella caudaequinae (SMITH, 1951)

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Higher TaxaScincidae, Sphenomorphinae (Sphenomorphini), Scincoidea, Sauria, Squamata (lizards)
Common NamesE: Horsetail Falls Ground Skink, Horsehead Ground Skink
S: Salamanquesa de Cola Café 
SynonymLeiolopisma caudaequinae SMITH 1951
Scincella caudaequinae — SMITH & TAYLOR 1950: 158
Scincella silvicola caudaequinae — DARLING & SMITH 1954
Scincella caudaequinae — GREER 1974: 32
Scincella silvicola caudaequinae — LINER 1994
Scincella caudaequinae — SHEA & GREER 2002: 156
Scincella syvicola caudaequinae — LAZCANO VILLARREAL & DIXON 2002
Scincella caudaequinae — GARCIA-VÁZQUEZ & FERIA-ORTIZ 2006
Scincella silvicola caudaequinae — LINER & CASAS-ANDREU 2008: 88
Scincella silvicola caudaequinae — GARCÍA-VÁZQUEZ et al. 2010
Scincella caudaequinae — LINKEM et al. 2011
Scincella silvicola caudaequinae — LAZCANO et al. 2017 
DistributionMexico (S San Luis Potosí, Tamaulipas).

Type locality: Salto Cola de Caballo, 25 miles south of Monterrey.  
TypesHolotype: INHS (= UIMNH) 10131 = Univ. Illinois Mus. Nat. Hist., paratypes: USNM (from 10 miles west of Naranjo, San Luis Potosi) 
DiagnosisDiagnosis: A member of the genus Leiolopisma similar and related to L. silvicolum, having a divided frontoparietal, 61-70 dorsals, a brown lateral stripe involving ear, 28-32 scale rows, and large, strong limbs overlapping in adults when adpressed and the fore-limb reaching eye; differing from silvicolum in having usually 1 pair of nuchals, 17-19 lamellae under the fourth toe, and a continuous, unbroken dorsolateral light stripe. (Smith 1951) 
CommentDistribution: Not listed for San Luis Potosí by Lemos-Espinal & Dixon 2013; not listed for Nuevo León by LEMOS-ESPINAL et al. 2016 (who consider caudaequinae as a subspecies of S. silvicola, Lemos-Espinal, pers. comm. 5 June 2016). Although the type locality has been said to be in Nuevo León, this species is not in Nuevo León fide Nevárez-de los Reyes et al. 2016. Not in Querétaro fide Tepos-Ramírez et al. (2023). 
EtymologyNamed after the type locality, the Horsetail Falls. 
  • Darling, Donald, M. and Hobart M. Smith. 1954. A collection of reptiles and amphibians from eastern Mexico. Transactions of the Kansas Academy of Science, 57(2): 180-195 - get paper here
  • García-Vázquez, Canseco-Márquez & Nieto-Montes de Oca 2010. A New Species of Scincella (Squamata: Scincidae) from the Cuatro Ciénegas Basin, Coahuila, Mexico. Copeia 2010 (3): 373-381 - get paper here
  • Garcia-Vázquez, U. & Feria-Ortiz, M. 2006. Skinks of Mexico. Reptilia (GB) (49): 74-79 - get paper here
  • Garcia-Vázquez, U. & Feria-Ortiz, M. 2006. Scincidos de México. Reptilia (Spain) (62): 78-83
  • Greer, A.E. 1974. The generic relationships of the scincid lizard genus Leiolopisma and its relatives. Australian Journal of Zoology 31: 1-67. - get paper here
  • Lazcano Villarreal, David & Dixon, J.R. 2002. Lista Preliminar de la Herpetofauna del Estado de Nuevo León. - get paper here
  • Lazcano, D., R. Quirino-Olvera, M. Nevárez de los Reyes and J. Banda-Leal 2017. Notes on Mexican Herpetofauna 29: Association of Herpetofauna with Sotols and Beargrasses in the State of Nuevo León, Mexico. Bull. Chicago Herp. Soc. 52: 17 - get paper here
  • Lemos-Espinal JA, Smith GR, Woolrich-Piña GA 2018. Amphibians and reptiles of the state of San Luis Potosí, Mexico, with comparisons with adjoining states. ZooKeys 753: 83-106 - get paper here
  • Linkem, Charles W.; Arvin C. Diesmos, Rafe M. Brown 2011. Molecular systematics of the Philippine forest skinks (Squamata: Scincidae: Sphenomorphus): testing morphological hypotheses of interspecific relationships. Zoological Journal of the Linnean Society 163: 1217–1243 - get paper here
  • Smith, H.M. & Taylor,E.H. 1950. An annotated checklist and key to the reptiles of Mexico exclusive of the snakes. Bull. US Natl. Mus. 199: 1-253 - get paper here
  • Smith, Hobart M. 1951. A new species of Leiolopisma (Reptilia: Sauria) from Mexico. Univ. Kansas Sci. Bull. 34 (3): 195-200 - get paper here
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