Home - Taxonomy - Geography - Biodiversity - Literature - Purchase RepFocus Recent updates
Citation: Midtgaard, Rune. RepFocus - A Survey of the Reptiles of the World. (www.repfocus.dk).
Latest update: December 31st, 2022.


Taxonomy of the family Colubridae
Bibliography of the genus Gyalopion
Biodiversity of the family Colubridae








Genus
Gyalopion

Western Hook-nosed Snakes, Plateau Hook-nosed Snakes

Westmexikanische Hakennasen-Nattern

Vestmexikanske Trynesnoge

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).

Gyalopion canum

Chihuahuan Hook-nosed Snake, Western Hook-nosed Snake

Chihuahua-Hakennasennatter

Chihuahua-krognæsesnog

1860 Gyalopium canum Cope
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).


Gyalopion quadrangulare

Desert Hook-nosed Snake, Thornscrub Hook-nosed Snake

Wüsten-Hakennasennatter

Ørken-krognæsesnog

1893 Ficimia quadrangularis Günther
Gyalopion quadrangularis Smith & Taylor 1941
1936 Ficimia desertorum Taylor 1936 (Hardy 1975)
Gyalopion desertorum Smith & Taylor 1941
Gyalopion quadrangularis desertorum Dixon & Fugler 1959
Ficimia quadrangularis desertorum Woodin 1962

Other common names:
desertorum: Sonora Hook-nosed Snake
Distribution: Mexico (Chihuahua, Nayarit, Sinaloa, Sonora), USA (Arizona).