Citation: Midtgaard, Rune. RepFocus - A Survey of the Reptiles of the World. (www.repfocus.dk).
Latest update: December 31st, 2022.
 
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Genus
Hypsiglena
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North American Night Snakes
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Nachtnattern, Nachtschlangen
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Nordamerikanske Natsnoge
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1860 |  |
Hypsiglena Cope (type species: Hypsiglena ochrorhyncha Cope 1860) |
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1860 | |
Pseudodipsas Peters (type species: Pseudodipsas fallax Peters 1860) |
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1863 | |
Comastes Jan (type species: Comastes quincunciatus Jan 1871) |
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1960 | |
Eridiphas Leviton & Tanner (type species: Hypsiglena slevini Tanner 1943; syn. Mulcahy 2008) |
Contents:
10 species, of which 7 (70.0%) are endemic.
Endemism: 0%  100%
Remarks:
Includes an unnamed species (refered to as the "Cochise clade" or Hooded Night Snake by Mulcahy 2008).
Distribution:
W. North America.
Reported from:
Canada
(British Columbia),
Mexico
(Aguascalientes,
Baja California Norte
[incl.
Isla Cedros,
Isla Partida Norte,
Islas Coronados
(Isla Coronado Sur)],
Baja California Sur
[incl.
Isla Cerralvo,
Isla San Marcos,
Isla Santa Catalina,
Isla Tortuga],
Chihuahua,
Coahuila,
Colima
[incl.
Revillagigedo Islands
(Clarion)],
Durango,
Guanajuato,
Guerrero,
Hidalgo,
Jalisco,
Michoacan,
Morelos,
Nayarit
[incl.
Islas Marias
(Maria Magdalena)],
Nuevo Leon,
Oaxaca,
Puebla,
Queretaro,
San Luis Potosi,
Sinaloa,
Sonora
[incl.
Isla San Esteban],
Tamaulipas,
Zacatecas),
USA
(Arizona,
California
[incl.
Channel Islands],
Colorado,
Idaho,
Kansas,
Nevada,
New Mexico,
Oklahoma,
Oregon,
Texas,
Utah,
Washington).
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Hypsiglena affinis
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Rio Grande de Santiago Night Snake, (Boulenger's Night Snake)
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Rio-Grande-de-Santiago-Nachtnatter
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Rio Grande de Santiago-natsnog
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1894 | |
Hypsiglena affinis Boulenger |
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Hypsiglena torquata affinis Tanner & Robison 1960 |
Remarks:
Revalidated as a separate species by Mulcahy (2008).
Distribution:
Mexico
(Jalisco,
Nayarit,
Zacatecas).
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Hypsiglena catalinae
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Santa Catalina Night Snake
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Santa-Catalina-Nachtnatter
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Santa Catalina-natsnog
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1966 | |
Hypsiglena torquata catalinae Tanner |
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Hypsiglena chlorophaea catalinae Liner 2007 |
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Hypsiglena catalinae Mulcahy, Martínez-Gómez, Aguirre-León, Cervantes-Pasqualli & Zug 2014 |
Distribution:
Mexico
(Baja California Sur:
Isla Santa Catalina).
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Hypsiglena chlorophaea
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Desert Night Snake
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Wüsten-Nachtnatter
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Ørken-natsnog
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1860 | |
Hypsiglena chlorophaea Cope |
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Hypsiglena torquata chlorophaea Liner 1994 |
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Hypsiglena ochrorhyncha chlorophaea Schulte, Smith, Lemos-Espinal & Dayer 2007 |
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1945 | |
Hypsiglena ochrorhyncha deserticola Tanner (Mulcahy 2008) |
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Hypsiglena torquata deserticola Schmidt 1953 |
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Hypsiglena chlorophaea deserticola Liner 2007 |
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1945 | |
Hypsiglena ochrorhyncha lorealus Tanner (Mulcahy 2008) |
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Hypsiglena torquata loreala Schmidt 1953 |
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Hypsiglena chlorophaea loreala Mulcahy 2008 |
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1981 | |
Hypsiglena torquata tiburonensis Tanner |
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Hypsiglena chlorophaea tiburonensis Mulcahy 2008 |
Other common names:
chlorophaea: Sonoran Night Snake, Dusky-green Night Snake
deserticola: Northern Desert Night Snake, Great Basin Night Snake
loreala: Mesa Verde Night Snake
tiburonensis: Tiburon Night Snake
Remarks:
Revalidated as a separate species by Mulcahy (2008), but listed as such already by Liner (2007). Previously included catalinae.
Distribution:
Canada
(British Columbia),
Mexico
(Baja California Norte,
Sinaloa,
Sonora
[Isla San Esteban]),
USA
(Arizona,
California,
Colorado,
Idaho,
Nevada,
New Mexico,
Oregon,
Utah).
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Hypsiglena gularis
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Partida Norte Island Night Snake
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Partida-Norte-Nachtnatter
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Partida Norte-natsnog
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1954 | |
Hypsiglena torquata gularis Tanner |
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Hypsiglena gularis Grismer 1999 |
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Hypsiglena ochrorhyncha gularis Liner 2007 |
Remarks:
Treated as a subspecies or a synonym of ochrorhyncha by Mulcahy (2008) and Wallach, Williams & Boundy (2014).
The distribution of this species has been confused by some sources with Isla Partida Sur, off the northern tip of Isla Espirito Santo, Baja California Sur.
Distribution:
Mexico
(Baja California Norte:
Isla Partida Norte).
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Hypsiglena janii
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Chihuahuan Night Snake
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Chihuahua-Nachtnatter
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Chihuahua-natsnog
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1865 | |
Liophis janii Duges |
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Hypsiglena ochrorhynchus janii Smith 1943 |
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Hypsiglena torquata jani Zweifel 1954 |
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Hypsiglena janii Mulcahy 2008 |
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1893 | |
Hypsiglena texana Stejneger (Mulcahy 2008) |
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Hypsiglena torquata texana Schmidt 1953 |
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Hypsiglena ochrorhynchus texana Tanner 1946 |
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Hypsiglena jani texana Liner 2007 |
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1938 | |
Hypsiglena torquata dunklei Taylor (Mulcahy 2008) |
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Hypsiglena dunklei Smith & Taylor 1945 |
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Hypsiglena jani dunklei Liner 2007 |
Other common names:
dunklei: Tamaulipas Night Snake, (Dunkle's Night Snake)
jani: San Luis Potosi Night Snake, Jan's Night Snake
texana: Texas Night Snake
Remarks:
Regarded as a synonym of chlorophaea by Lemos-Espinal & Smith (2007). Revalidated as a separate species by Mulcahy (2008), but listed as such already by Liner (2007).
Distribution:
Mexico
(Aguascalientes,
Chihuahua,
Coahuila,
Durango,
Guanajuato,
Hidalgo,
Jalisco,
Nuevo Leon,
Queretaro,
San Luis Potosi,
Tamaulipas,
Zacatecas),
USA
(Arizona,
Colorado,
Kansas,
New Mexico,
Oklahoma,
Texas).
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Hypsiglena ochrorhyncha
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Coast Night Snake
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Küsten-Nachtnatter
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Kyst-natsnog
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1860 | |
Hypsiglena ochrorhyncha Cope |
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Hypsiglena torquata ochrorhyncha Bogert & Oliver 1945 |
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1899 | |
Hypsiglena venusta Mocquard (Mulcahy 2008) |
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Hypsiglena torquata venusta Zweifel 1958 |
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Hypsiglena ochrorhyncha venusta Liner 2007 |
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1943 | |
Hypsiglena nuchalata Tanner (Mulcahy 2008) |
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Hypsiglena torquata nuchalata Schmidt 1953 |
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Hypsiglena ochrorhyncha nuchalata Mulcahy 2008 |
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1944 | |
Hypsiglena torquata tortugensis Tanner (Grismer 2002) |
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Hypsiglena ochrorhynchus tortugensis Tanner 1946 |
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1945 | |
Hypsiglena ochrorhyncha klauberi Tanner (Mulcahy 2008) |
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Hypsiglena torquata klauberi Schmidt 1953 |
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1958 | |
Hypsiglena torquata baueri Zweifel (Mulcahy 2008) |
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Hypsiglena ochrorhyncha baueri Liner 2007 |
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1962 | |
Hypsiglena torquata martinensis Tanner & Banta (Mulcahy 2008) |
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Hypsiglena ochrorhyncha martinensis Liner 2007 |
Other common names:
baueri: Cedros Night Snake, (Bauer's Night Snake)
klauberi: San Diego Night Snake
martinensis: San Martin Island Night Snake
nuchalata: California Night Snake
ochrorhyncha: Cape Night Snake, Spotted Night Snake
tortugensis: Tortuga Night Snake
venusta: Magdalena Night Snake, (Islands Night Snake)
Remarks:
Previously included chlorophaea, gularis, and unaocularis. Previously regarded as a subspecies of torquata. Revalidated as a separate species by Mulcahy (2008), although listed as such already by Liner (2007). Liner's (1964) record from Nuevo Leon refer to janii (Liner 1966). A record from Clarion Island in the Revillagigedo Islands (Colima) (Bogert & Oliver 1945) is considered erroneous (Brattstrom 1955).
Distribution:
Mexico
(Baja California Norte
[incl.
Isla Cedros,
Islas Coronados
(Isla Coronado Sur)],
Baja California Sur
[incl.
Isla San Marcos,
Isla Tortuga],
Michoacan),
USA
(California
[incl.
Channel Islands],
Oregon,
Texas,
Washington).
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Hypsiglena slevini
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Baja California Night Snake, (Slevin's Night Snake)
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Niederkalifornische Nachtnatter
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Baja California-natsnog
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1943 | |
Hypsiglena slevini Tanner |
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Eridiphas slevini Leviton & Tanner 1960 |
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1978 | |
Eridiphas slevini marcosensis Ottley & Tanner (Mulcahy & Archibald 2003) |
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Eridiphas marcosensis Grismer 1999 |
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Hypsiglena marcosensis Anonymous 2015 [Herpetological Review 46(2): 225] |
Other common names:
marcosensis: San Marcos Night Snake
slevini: Slevin's Night Snake
Remarks:
Reassigned to Hypsiglena by Mulcahy (2008).
Distribution:
Mexico
(Baja California Norte,
Baja California Sur
[incl.
Isla Cerralvo,
Isla San Marcos]).
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Hypsiglena tanzeri
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Rio Verde Night Snake, (Tanzer's Night Snake)
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Rio-Verde-Nachtnatter
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Rio Verde-natsnog
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1972 | |
Hypsiglena tanzeri Dixon & Lieb |
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Hypsiglena torquata tanzeri Tanner 1981 |
Remarks:
Regarded as a subspecies of torquata by Tanner (1981), however, some authors (e.g., Dixon & Dean 1986, Liner 1993) continued regarding it as a valid species.
Revalidated as a separate species by Mulcahy (2008).
Not mentioned for Queretaro by Cruz-Elizalde, Ramírez-Bautista, Hernández-Salinas, Berriozabal-Islas & Wilson (2019).
Distribution:
Mexico
(Guanajuato,
Hidalgo,
San Luis Potosi,
Tamaulipas).
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Hypsiglena torquata
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Sinaloan Night Snake, (Collared Night Snake, Common Night Snake)
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Sinaloa-Nachtnatter
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Sinaloa-natsnog
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1860 | |
Leptodeira torquata Günther |
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Hypsiglena torquata Boulenger 1894 |
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1871 | |
Comastes quincunciatus Jan (Peters & Orejas-Miranda 1970) |
Remarks:
Previously included affinis, chlorophaea, gularis, janii, ochrorhyncha, and tanzeri.
Not mentioned for Chihuahua by Lemos-Espinal, Smith, Woolrich-Piña & Cruz (2017).
Records from Costa Rica refer to
Leptodeira septentrionalis (Savage & Bolaños 2009).
Presence in Sonora needs confirmation, although reported by Lemos-Espinal & Smith (2007).
Listed as likely to occur in the state by Lemos-Espinal, Smith & Rorabaugh (2019).
Distribution:
Mexico
(Chihuahua,
Colima,
Durango,
Guerrero,
Jalisco,
Michoacan,
Morelos,
Nayarit
[incl.
Islas Marias
(Maria Magdalena)],
Oaxaca,
Puebla,
Sinaloa).
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Hypsiglena unaocularis
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Revillagigedo Islands Night Snake
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Revillagigedo-Nachtnatter
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Revillagigedo-natsnog
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1944 | |
Hypsiglena torquata unaocularis Tanner |
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Hypsiglena ochrorhyncha unaocularis Liner 2007 |
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Hypsiglena unaocularis Mulcahy, Martínez-Gómez, Aguirre-León, Cervantes-Pasqualli & Zug 2014 |
Distribution:
Mexico
(Colima:
Revillagigedo Islands:
Clarion).
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