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Rhadinaea sargenti DUNN & BAILEY, 1939

IUCN Red List - Rhadinaea sargenti - Least Concern, LC

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesE: Sargent's Graceful Brown Snake 
SynonymRhadinaea sargenti DUNN & BAILEY 1939
Enicognathus taeniolatus JAN 1863 (see comment)
Enicognathus taeniolatus — JAN 1866
Rhadinaea sargenti — MYERS 1974: 162
Rhadinaea sargenti — WALLACH et al. 2014: 641 

Type locality: Pequení-Esperanza ridge near the head of the [Río] Pequení, 1800 feet [549 m elevation], Panama Province, Panama.  
TypesHolotype: MCZ 42788 
DiagnosisDiagnosis: Myers 1974: 162. 
CommentSynonymy: MYERS (1974: 202) and DI-BERNARDO (1992: 233) synonymized the type of Enicognathus taeniolatus with Rhadinea brevirostris (PETER, 1863), DIXON (1980: 16) took E. taeniolatus JAN in incerta sedis melanostigma WAGLER, 1824. But these authors did not examine the holotype. According to DI-BERNARDO, after he has seen a photo of the type (pers. comm., 1997) the holotype is most similar to Rhadinea vermiculaticeps (COPE, 1860) or R. sargenti DUNN & BAILEY, 1939 from Costa Rica or Panama (from Hallermann 1998). Wallach et al. 2014 list Enicognathus taeniolatus as synonym of Taeniophallus brevirostris.

JAN 1866 also states that Enicognathus taeniolatus is from “Brésil” [= Brazil]. 
EtymologyNamed after W. M. Sargent, a surveyor employed by the Panama Canal Company. He was head of a surveying party that collected 78 snake specimens, including the type of this one (1937). 
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Dunn, Emmett R. & Bailey, Joseph R. 1939. Snakes from the uplands of the Canal Zone and of Darien. Bull. Mus. Comp. Zool. Harvard 86 (1): 1-22 - get paper here
  • Jan, G. 1866. Iconographie générale des ophidiens. 16. Livraison. J.B. Bailière et Fils, Paris - get paper here
  • Myers, C. W. & Roberto, I. D. 2012. Rhadinaea "sargenti," a misspelled patronym honoring Commander William M. Sergeant (1902-1983). Herpetological Review 43: 591-593 - get paper here
  • Myers, C.W. 1974. The systematics of Rhadinaea (Colubridae), a genus of New World snakes. Bull. Amer. Mus. nat. Hist. 153 (1): 1-262 - get paper here
  • Ray, Julie M. and Patty Ruback 2015. Updated checklists of snakes for the provinces of Panamá and Panamá Oeste, Republic of Panama. Mesoamerican Herpetology 2 (2): 168-188 - 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.
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