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
Gyalopion
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Western Hook-nosed Snakes, Plateau Hook-nosed Snakes
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Westmexikanische Hakennasen-Nattern
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Vestmexikanske Trynesnoge
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1860 |  |
Gyalopion Cope (type species: Gyalopium canum Cope 1860) |
Contents:
2 species, none of which are endemic.
Endemism: 0%  100%
Distribution:
SW. USA, N. Mexico.
Reported from:
Mexico
(Chihuahua,
Coahuila,
Durango,
Michoacan,
Nayarit,
Nuevo Leon,
Queretaro,
San Luis Potosi,
Sinaloa,
Sonora,
Zacatecas),
USA
(Arizona,
New Mexico,
Texas).
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Gyalopion canum
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Chihuahuan Hook-nosed Snake, Western Hook-nosed Snake
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Chihuahua-Hakennasennatter
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Chihuahua-krognæsesnog
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1860 | |
Gyalopium canum Cope |
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Ficimia cana Garman 1883 |
Remarks:
Presence in Jalisco is considered unconfirmed (Chávez-Avila, Casas-Andreu, García-Aguayo, Cifuentes-Lemus & Cupul-Magaña 2015), although included for the state by
some authors (e.g., Ponce-Campos, Huerta-Ortega & Mora-Navarro 2001; Heimes 2016; Cruz-Sáenz, Muñoz-Nolasco, Mata-Silva, Johnson, García-Padilla & Wilson 2017).
Distribution:
Mexico
(Chihuahua,
Coahuila,
Durango,
Michoacan,
Nuevo Leon,
Queretaro,
San Luis Potosi,
Sonora,
Zacatecas),
USA
(Arizona,
New Mexico,
Texas).
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Gyalopion quadrangulare
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Desert Hook-nosed Snake, Thornscrub Hook-nosed Snake
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Wüsten-Hakennasennatter
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Ørken-krognæsesnog
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1893 | |
Ficimia quadrangularis Günther |
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Gyalopion quadrangularis Smith & Taylor 1941 |
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1936 | |
Ficimia desertorum Taylor 1936 (Hardy 1975) |
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Gyalopion desertorum Smith & Taylor 1941 |
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Gyalopion quadrangularis desertorum Dixon & Fugler 1959 |
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Ficimia quadrangularis desertorum Woodin 1962 |
Other common names:
desertorum: Sonora Hook-nosed Snake
Distribution:
Mexico
(Chihuahua,
Nayarit,
Sinaloa,
Sonora),
USA
(Arizona).
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