Citation: Midtgaard, Rune. RepFocus - A Survey of the Reptiles of the World. (www.repfocus.dk).
Latest update:
October 17th, 2024.
 
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Genus
Gerrhonotus
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Eastern Alligator Lizards
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Östliche Alligatorschleichen, Krokodilschleichen
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Østlige Alligatorøgler
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1828 |  |
Gerrhonotus Wiegmann (type species: Gerrhonotus tesselatus Wiegmann 1834) |
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1829 | |
Pterogastenes Peale & Green (type species: Scincus ventralis Peale & Green 1829; syn. Good 1988) |
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1949 | |
Coloptychon Tihen (type species: Gerrhonotus rhombifer Peters 1877; syn. García-Vázquez, Nieto-Montes de Oca, Bryson, Schmidt-Ballardo & Pavón-Vázquez 2018) |
Contents:
7 species, of which 4 (57.1%) are endemic.
Endemism: 0%  100%
Remarks:
Previously included the species now placed in the genera
Abronia,
Barisia,
Desertum, and
Elgaria.
Tihen (1949) revalidated the genera
Abronia,
Barisia, and
Elgaria, and described a new genus,
Coloptychon.
Subsequent works (e.g., Waddick & Smith 1974; Good 1987) have supported the validity of Tihen's arrangement, which today is generally accepted, apart from
Coloptychon, which has been synonymized with Gerrhonotus.
Another nominal genus,
Mesaspis,
has been synonymized with
Abronia.
Distribution:
Costa Rica,
Guatemala,
Mexico
(Aguascalientes,
Chiapas,
Chihuahua,
Coahuila,
Colima,
Durango,
Guanajuato,
Guerrero,
Hidalgo,
Jalisco,
Mexico State,
Michoacan,
Morelos,
Nayarit,
Nuevo Leon,
Oaxaca,
Puebla,
Queretaro,
San Luis Potosi,
Sinaloa,
Tamaulipas,
Veracruz,
Zacatecas),
Panama,
USA
(Texas).
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Gerrhonotus farri
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Tamaulipan Alligator Lizard
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Tamaulipas-Alligatorschleiche
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Tamaulipas-alligatorøgle
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2010 | |
Gerrhonotus farri Bryson & Graham |
Distribution:
Mexico
(Tamaulipas).
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Gerrhonotus infernalis
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Texas Alligator Lizard
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Texas-Alligatorschleiche
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Texas-alligatorøgle
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1858 | |
Gerrhonotus infernalis Baird |
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Gerrhonotus liocephalus infernalis Cope 1900 |
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1954 | |
Gerrhonotus liocephalus taylori Tihen (syn. Good 1994; Lavin-Murcio & Lazcano 2010; Lemos-Espinal, Smith, Woolrich-Pina & Cruz 2017 [by implication]) |
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Gerrhonotus taylori Lemos-Espinal & Smith 2007 |
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1989 | |
Gerrhonotus liocephalus aguayoi Contreras Arquieta (Good 1994) |
Remarks:
Revalidated as a separate species by Good (1994).
First reported from Chihuahua by Candelario Hernandez, Mendoza Pérez, Herr, Giovanetto, Hernandez & Graham (2017), although listed for the state already by
Jones & Lovich (eds.) (2009).
Distribution:
Mexico
(Chihuahua,
Coahuila,
Durango,
Guanajuato,
Hidalgo,
Nuevo Leon,
Queretaro,
San Luis Potosi,
Tamaulipas),
USA
(Texas).
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Gerrhonotus liocephalus
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Tlapancingo Alligator Lizard, (Wiegmann's Alligator Lizard)
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Tlapancingo-Alligatorschleiche
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Tlapancingo-alligatorøgle
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1828 | |
Gerrhonotus liocephalus Wiegmann |
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1829 | |
Scincus ventralis Peale & Green (Good 1994) |
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1834 | |
Gerrhonotus tessellatus Wiegmann [substitute name for Gerrhonotus liocephalus Wiegmann 1828] (Good 1994) |
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1946 | |
Gerrhonotus liocephalus austrinus Hartweg & Tihen |
Other common names:
austrinus: Alligator Snake Lizard
liocephalus: Eastern Alligator Lizard
Remarks:
Previously included infernalis and ophiurus.
Populations from Western Mexico (Colima, SW. Durango, Jalisco, Sinaloa) are of uncertain status, but tentatively referred to liocephalus (Good 1994).
Distribution:
Guatemala,
Mexico
(Aguascalientes,
Chiapas,
Colima,
Durango,
Guanajuato,
Guerrero,
Hidalgo,
Jalisco,
Mexico State,
Michoacan,
Morelos,
Nayarit,
Oaxaca,
Puebla,
Sinaloa,
Veracruz,
Zacatecas).
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Gerrhonotus mccoyi
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Cuatro Ciénegas Alligator Lizard
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Cuatro-Ciénegas-Alligatorschleiche
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Cuatro Ciénegas-alligatorøgle
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2018 | |
Gerrhonotus mccoyi García-Vázquez, Contreras-Arquieta, Trujano-Ortega & Nieto-Montes de Oca |
Remarks:
Previously regarded as a population of infernalis.
Distribution:
Mexico
(Coahuila).
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Gerrhonotus ophiurus
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Serpentine Alligator Lizard, (Snake Lizard)
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Schlangen-Alligatorschleiche
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Slange-alligatorøgle
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1866 | |
Gerrhonotus ophiurus Cope |
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Gerrhonotus liocephalus ophiurus Cope 1900 |
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1872 | |
Gerrhonotus lemniscatus Bocourt (Smith & Taylor 1950) |
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1948 | |
Gerrhonotus liocephalus loweryi Tihen (Good 1994) |
Other common names:
loweryi: Lowery's Alligator Lizard
Remarks:
Previously regarded as a subspecies of liocephalus (e.g., Wermuth 1969). Revalidated as a separate species by Good (1994).
Distribution:
Mexico
(Hidalgo,
Nuevo Leon,
Oaxaca,
Puebla,
Queretaro,
San Luis Potosi,
Tamaulipas,
Veracruz).
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Gerrhonotus parvus
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Pigmy Alligator Lizard
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Zwerg-Alligatorschleiche
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Dværg-alligatorøgle
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1985 | |
Gerrhonotus parvus Knight & Scudday |
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Elgaria parva Smith 1986 |
Remarks:
Based on molecular evidence, Conroy, Bryson, Lazcano & Knight (2005) reclassified this species as a member of the genus Gerrhonotus.
Distribution:
Mexico
(Coahuila,
Nuevo Leon).
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Gerrhonotus rhombifer
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Isthmian Alligator Lizard, Chiriqui Alligator Lizard, (Peters' Alligator Lizard)
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Panama-Ringelschleiche
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Panamansk Alligatorøgle
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1877 | |
Gerrhonotus rhombifer Peters |
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Coloptychon rhombifer Tihen 1949 |
Remarks:
Previously placed in a separate genus (Coloptychon), but recently reassigned to Gerrhonotus
(García-Vázquez, Nieto-Montes de Oca, Bryson, Schmidt-Ballardo & Pavón-Vázquez 2018).
Distribution:
Costa Rica,
Panama.
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