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Crotalus concolor WOODBURY, 1929

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Higher TaxaViperidae, Crotalinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Midget Faded Rattlesnake 
SynonymCrotalus concolor WOODBURY 1929
Crotalus confluentus decolor KLAUBER 1930 (nom. subst.)
Crotalus viridis concolor — KLAUBER 1936
Crotalus viridis decolor — GLOYD 1940
Crotalus confluentus decolor — WOODBURY & SMITH 1951
Crotalus viridis concolor — KISSER 1980
Crotalus viridis concolor — CROTHER 2000: 60
Crotalus oreganus concolor — ASHTON et al. 2001
Crotalus concolor — DOUGLAS et al. 2002
Crotalus concolor — HOUSTON 2006
Crotalus oreganus concolor — CAMPBELL & LAMAR 2004
Crotalus oreganus concolor — BEAMAN & HAYES 2008
Crotalus concolor — HOSER 2009
Crotalus viridis concolor — WERNING 2012
Crotalus oreganus concolor — CROTHER et al. 2012
Crotalus concolor — WALLACH et al. 2014: 189
Crotalus concolor — DAVIS et al. 2016 
DistributionUSA (Utah: basins of the Colorado and Green Rivers)

Type locality: “King’s Ranch, Garfield Co., at base of the Henry Mtns.” [= Utah, USA].  
Reproductionovovivparous 
TypesHolotype: UMNH 306 (Natural History Museum of Utah, Drew Dittmer, pers. comm., 24 March 2021), given as UTAH 306 by Gloyd 1940: 216; also see comment. 
DiagnosisAdditional details, e.g. a detailed description or comparisons (3386 characters), are available for collaborators and contributors. Please contact us for details. 
CommentVenomous!

Synonymy: Note that Klauber 1930 created a new name (”decolor”) as he believed that Crotalus concolor was pre-occupied by Jan 1859: 153, a nomen nudum which originally appeared as a variety of C. durissus [horridus], and was later placed in the synonymy of C. horridus by Garman (1883: 175) and by Stejneger (1895: 427) fide Gloyd 1940: 216. Jan’s specimen was supposedly deposited in Munich (ZSM) but is now lost.

Distribution: see map in Davis et al. 2016 (Fig. 2).

SIZE: up to 63 cm 
EtymologyNamed after Latin concolor = of the same color. Woodbury only mentions it’s close relationship with C. mitchelli, although he states that the color is different. 
References
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