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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) 
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.
 
References
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