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Pseudelaphe phaescens (DOWLING, 1952)

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Higher TaxaColubridae, Colubrinae, Lampropeltini, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Yucatan Rat Snake
S: Ratonera del Yucateca 
SynonymElaphe flavirufa phaescens DOWLING 1952: 7
Elaphe flavirufa phaescens — KLUGE 1984
Elaphe phaescens — LINER 1994
Pseudoelaphe phaescens — FLORES-VILLELA & CANSECO-MÁRQUEZ 2004
Pseudoelaphe phaescens — HEIMES 2016: 138 
DistributionMexico (Yucatan, Campeche, Quintana Roo)

Type locality: Yucatan, Vallodolid, Chichén Itzá  
Reproductionoviparous 
TypesHolotype: UMMZ 73074; paratypes: UMMZ, MCZ, USNM 
DiagnosisDiagnosis: “This subspecies may be distinguished from the other three subspecies by a smaller number of dorsal blotches, fewer caudals, and a larger number of scale rows on the anterior and posterior parts of the body.” (Dowling 1952) 
Comment 
EtymologyFrom the Greek phaiós meaning gray in allusion to its coloration grayish tan. 
References
  • Dowling, H. G. 1952. A taxonomic study of the ratsnakes, genus Elaphe Fitzinger, II. The subspecies of Elaphe flavirufa (Cope). Occ. Pap. Mus. Zool. Univ. Michigan 540: 1-14. - get paper here
  • Flores-Villela, O. & Canseco-Márquez, L. 2004. Nuevas especies y cambios taxonómicos para la herpetofauna de México. Acta Zoologica Mexicana (n.s.) 20 (2): 115-144 - get paper here
  • González-Sánchez, V. H., J. D. Johnson, E. García-Padilla, V. Mata-Silva, D. L. DeSantis and L. D. Wilson. 2017. The Herpetofauna of the Mexican Yucatan Peninsula: composition, distribution, and conservation status. Mesoamerican Herpetology 4(2): 264–380 - get paper here
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp
  • Kluge, Arnold G. 1984. Type-specimens of reptiles in the University of Michigan Museum of Zoology. [type catalogue] Miscellaneous publications, Museum of Zoology, University of Michigan (167): 1-85 - get paper here
  • Köhler, G. 2008. Reptiles of Central America. 2nd Ed. Herpeton-Verlag, 400 pp.
  • Liner, E.A. 1994. Scientific and common names for the Amphibians and Reptiles of Mexico in English and Spanish. Herpetological Circular 23: 1-113
  • Nahuat-Cervera, Pedro Enrique 2020. Amphibians and reptiles of the Hobonil Educative Center, Tzucacab, Yucatán, Mexico. Rev. Latinoamer. Herp. 3 (1): 53-65 - get paper here
 
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