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Hypsiglena jani (DUGÈS, 1865)

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
SubspeciesHypsiglena jani dunklei (TAYLOR 1939)
Hypsiglena jani jani (DUGÈS 1866)
Hypsiglena jani texana STEJNEGER 1893 
Common NamesE: Tamaulipas Nightsnake [dunklei]
E: San Luis Potosi Nightsnake [jani]
E: Texas Nightsnake [texana]
S: Nocturna de Chihuahuan 
SynonymHypsiglena torquata jani (DUGÈS 1865)
Liophis janii DUGÈS 1865: 32
Hypsiglena ochrorhynchus janii — TANNER 1946: 48 (1944)
Hypsiglena torguata — VAN DEVENDER & LOWE 1977 (in error)
Hypsiglena torquata — CONANT & COLLINS 1991: 217
Hypsiglena torquata jani — CROTHER 2000: 63
Hypsiglena torquata jani — TENNANT & BARTLETT 2000: 457
Hypsiglena torquata jani — SCHMIDT & KUNZ 2005: 22
Hypsiglena jani jani — MULCAHY 2008
Hypsiglena jani — WALLACH et al. 2014: 343

Hypsiglena jani dunklei (TAYLOR 1939)
Hypsiglena torquata dunklei TAYLOR 1939: 374
Hypsiglena dunklei — TANNER 1946: 48 (1944)
Hypsiglena jani dunklei — MULCAHY 2008

Hypsiglena jani texana STEJNEGER 1893
Hypsiglena texana STEJNEGER 1893: 205
Hypsiglena ochrorhynchus texana — TANNER 1946: 51 (1944)
Hypsiglena ochrorhyncha texana — JAMESON & FLURY 1949
Hypsiglena torquata texana — TANNER 1985: 632
Hypsiglena torquata jani — DIXON 2000: map 118
Hypsiglena jani texana — MULCAHY 2008
Hypsiglena jani texana — CROTHER et al. 2012 
DistributionMexico (Guanajuato, N Querétaro, N Hidalgo, San Luis Potosi, SW Tamaulipas)

dunklei: USA (S Texas); Mexico (Tamaulipas, Nuevo Leon); Type locality: Hacienda La Clementina, 3 mi. W. of Forlon, Tamaulipas, Mexico, 23.26°, -98.85° (NAD27).

jani: Mexico (Guanajuato); Type locality: Guanajuato, Guanajuato, Mexico.

texana: USA (E Arizona, New Mexico, SE Colorado, SW Kansas, W Oklahoma, Texas), Mexcio (Tamaulipas, Nuevo Leon, Coahuila, E Chihuahua, E Durango, Zacatecas, San Luis Potosi, Aguascalientes); Type locality: “beween Laredo and Camargo, Texas”.  
Reproductionoviparous 
TypesNeotype: USNM 9889 (designated by Smith & Necker 1943, incorrect fide Flores-Villela 2016); Synypes: USNM 9889, 11369 and additional specimens (unclear fide TANNER 1944: 37, but confirmed by Dan Mulcahy, pers. comm. 11 March 2011); original holotype in MDUG (also as MADUG / HE) 102 (Museo de Historia Natural Alfredo Dugès, at the University of Guanajuato).
Holotype: MCZ R-42594 [dunklei]
Holotype: USNM 1782 [texana] 
DiagnosisDiagnosis: see Tanner 1946: 50 (as H. ochrorhynchus janii)


Additional details (3191 characters) are available for collaborators and contributors. Please contact us for details. 
CommentDistribution: dunklei has been found in S Texas and jani jani is only in Mexico, not the US (Dan Mulcahy, pers. comm. 24 Aug 2018). 
EtymologyThe name jani is a patronym for the 19th century herpetologist Giorgio Jan, who along with his co-author, Ferdinand Sordelli, authored lconographie Generale des Ophidiens, a classical work in herpetology that was published in three volumes from 1860 to 1881.

H. j. dunklei was named after the collector of the type specimen, David Hosbrook Dunkle (1911-1984), American paleontologist, and curator of vertebrate paleontology for the Cleveland Museum of Natural History and later associate curator for the Smithsonian Museum of Natural History.

H. j. texana was named after its occurrence in Texas. 
References
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