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Heterodon kennerlyi KENNICOTT, 1860

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesE: Mexican Hognose Snake
S: Trompa de Cerdo Mexicana 
SynonymHeterodon Kennerlyi KENNICOTT 1860: 336
Heterodon nasicus var. Kennerlyi — JAN 1865
Heterodon simus var. kennerlyi — GARMAN 1884: 77
Heterodon nasicus kennerlyi — JAMESON & FLURY 1949
Heterodon nasicus kennerlyi — CONANT & COLLINS 1991: 177
Heterodon nasicus kennerlyi — WALLEY & ECKERMAN 1999
Heterodon nasicus kennerlyi — CROTHER 2000: 62
Heterodon nasicus kennerlyi — TENNANT & BARTLETT 2000: 357
Heterodon kennerlyi — SMITH et al. 2003
Heterodon kennerlyi — VÁSQUEZ-DIAZ & QUINTERO-DIAZ 2005
Heterodon kennerlyi — SCHMIDT 2009
Heterodon nasicus kennerlyi — COLLINS & TAGGART 2009
Heterodon kennerlyi — SCHMIDT 2012
Heterodon nasicus kennerlyi — WERNING 2012
Heterodon kennerlyi — CROTHER et al. 2012
Heterodon kennerlyi — WALLACH et al. 2014: 329 
DistributionUSA (S Texas, S New Mexico, S Arizona), Mexico (Coahuila, Chihuahua, Sonora, Aguascalientes, San Luis Potosí, Nuevo León, Tamaulipas, Durango, Zacatecas, Jalisco).

Type locality: "Matamoros, Mexico" (in error) via lectotype selection. Restricted to lower Rio Grande River, Texas and Matamoros, Mexico (latter in error) fide Coues & Yarrow (1878: 271). Sonora corrected to south of the Gila River in Santa Cruz or Cochise Co., SE Arizona, USA, fide Bogert (1939: 198-199), Stejneger (1940: 204) and Stickel (1943: 120).  
TypesLectotype: USNM 1282, designated by Cope (1900: 774). Other syntypes: USNM 7290, 1260 
CommentSubspecies: SMITH et al. suggested to elevate Heterodon nasicus kennerlyi to full species status, based on two scale characters.

Distribution: see map in Walley & Eckerman 1999.

Diet: frogs, toads, salamanders, lizards, snakes, birds, insects 
EtymologyThe specific epithet is a patronym honoring Caleb Burwell Rowan Kennerly, a surgeon in the United States Army who in the middle of the 19th century accompanied expeditions to the western US and northern Mexico where he collected amphibians and reptiles. 
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