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Rhadinaea marcellae TAYLOR, 1949

IUCN Red List - Rhadinaea marcellae - Endangered, EN
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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Marcella's Graceful Brown Snake
S: Hojarasquera de Marcella 
SynonymRhadinaea marcellae TAYLOR 1949
Rhadinaea marcellae — LINER 1994
Rhadinaea marcellae — LINER 2007
Rhadinaea marcellae — WALLACH et al. 2014: 640 
DistributionMexico (Puebla, Hidalgo, San Luis Potosí, Veracruz)

Type locality: Xilitla region, San Luis Potosi, Mexico.  
Reproductionoviparous 
TypesHolotype: LSUM 270 (Louisiana St. Univ. Mus. Zool.), May 12, 1947. Collected by Marcella Newman. 
DiagnosisDiagnosis: Dorsolateral light line on head beginning on the snout, running through upper edge of eye to behind mouth angle, then back and upward to join the lateral body stripe, which occupies the fifth rows and is composed of a series of disconnected light spots each covering about half of a scale; a nuchal white black-edged collar connecting the ends of the lateral body stripes; head with a somewhat elaborate stippled pattern; outer edge of ventrals dark, the area intensified at the posterior outer edges of the scales. Black dots on most of the supralabials, and smaller spots on mental and three first infralabials; 2 preoculars, the lower small; ventrals, 128; caudals, 78; four infralabials touch first chinshields [from TAYLOR 1949]. 
CommentKnown from only 12 specimens (Nicolas Vidal on Facebook, 23 Jan 2018)

Group: Rhadinaea decorata group 
EtymologyNamed after the collector, Marcella Newman. 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Canseco-Marquez,L.; Gutierrez-Mayen,G. & Salazar-Arenas,J. 2000. New records and range extensions for amphibians and reptiles from Puebla, México. Herpetological Review 31 (4): 259-263 - get paper here
  • Garcia, Efrain Hernandez;Quijano, Fernando Mendoza 1994. Rhadinaea marcellae (NCN). Mexico: Hidalgo. Herpetological Review 25 (1): 34 - get paper here
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp
  • 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
  • Lemos-Espinal, J. A., & Smith, G. R. 2025. Comparison of Amphibians and Reptiles in Neighboring Biogeographic Provinces to the Sierra Madre Oriental Biogeographic Province of Mexico. Herpetological Conservation and Biology, 20(1), 131-149 - get paper here
  • Lemos-Espinal, Julio A. and James R. Dixon 2013. Amphibians and Reptiles of San Luis Potosí. Eagle Mountain Publishing, xii + 300 pp.
  • Lemos-Espinal, Julio A., Geoffrey R. Smith 2015. Amphibians and reptiles of the state of Hidalgo, Mexico. Check List 11 (3): 1642 - get paper here
  • Liner, Ernest A. 2007. A CHECKLIST OF THE AMPHIBIANS AND REPTILES OF MEXICO. Louisiana State University Occasional Papers of the Museum of Natural Science 80: 1-60 - get paper here
  • Nieto-Montes de Oca,A. & Mendelson III, J.R. 1997. Variation in Rhadinaea marcellae (Squamata: Colubridae), a poorly known species from the Sierra Madre Oriental of Mexico. Journal of Herpetology 31 (1): 124-127 - get paper here
  • Sánchez-García JC, Canseco-Márquez L, Pavón-Vázquez CJ, Cruzado-Cortés J, García-Vázquez UO 2019. New records and morphological variation of Rhadinaea marcellae Taylor, 1949 (Squamata, Colubridae) from Sierra Madre Oriental, México. Check List 15(5): 729-733 - get paper here
  • Taylor, E. H. 1950. Second contribution to the herpetology of San Luis Potosi. Univ. Kansas Sci. Bull. 33 (11): 441-457 - get paper here
  • Taylor,E.H. 1949. A preliminary account of the herpetology of the state of San Luis Potosi, Mexico. Univ. Kansas Sci. Bull. 33 (2): 169-215 - get paper here
  • Torres-Hernández, LA, Ramírez-Bautista A, Cruz-Elizalde R, Hernández-Salinas U, Berriozabal-Islas C, DeSantis DL, Johnson JD, Rocha A, García-Padilla E, Mata-Silva V, Fucsko LA, and Wilson LD. 2021. The herpetofauna of Veracruz, Mexico: composition, distribution, and conservation status. Amphibian & Reptile Conservation 15(2) [General Section]: 72–155 - 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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