Citation: Midtgaard, Rune. RepFocus - A Survey of the Reptiles of the World. (www.repfocus.dk).
Latest update:
April 5th, 2026.
 
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Genus
Barisia
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Mexican Alligator Lizards
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Mexikanische Alligatorschleichen
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Mexicanske Alligatorøgler
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1838 |  |
Barisia Gray (type species: Cordylus multi-carinatus Blainville 1835) |
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1843 | |
Trachypeltis Fitzinger (type species: Cordylus multi-carinatus Blainville 1835; syn. Good 1988) |
Contents:
7 species, all of which are endemic.
Endemism: 0%  100%
Remarks:
Previously included in
Gerrhonotus (se remarks under that genus).
Distribution:
Mexico
(Aguascalientes,
Chihuahua,
Coahuila,
Colima,
Distrito Federal,
Durango,
Guanajuato,
Guerrero,
Hidalgo,
Jalisco,
Mexico State,
Michoacan,
Morelos,
Nayarit,
Nuevo Leon,
Oaxaca,
Puebla,
Queretaro,
San Luis Potosi,
Sinaloa,
Tamaulipas,
Tlaxcala,
Veracruz,
Zacatecas).
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Barisia ciliaris
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Northern Mexican Alligator Lizard, Northern Imbricate Alligator Lizard, (Northern Alligator Lizard, Sierra Alligator Lizard)
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Nordmexikanische Alligatorschleiche
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Nordmexicansk Alligatorøgle
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1942 | |
Gerrhonotus levicollis ciliaris Smith |
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Barisia imbricata ciliaris Tihen 1949 |
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Gerrhonotus imbricatus ciliaris Wermuth 1969 |
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Barisia ciliaris Smith, Burg & Chiszar 2002 |
Remarks:
Previously regarded as a subspecies of imbricata. Considered a separate species by Smith, Burg & Chiszar (2002), although Zaldivar-Riveron, Nieto-Montes de Oca & Laclette (2005) did not support this, followed by others (e.g., Valdez-Lares, Muñiz-Martínez, Gadsden, Aguirre-León, Castañeda-Gaytán & González-Trápaga 2013).
Distribution:
Mexico
(Aguascalientes,
Chihuahua,
Coahuila,
Durango,
Guanajuato,
Hidalgo,
Jalisco,
Nuevo Leon,
Queretaro,
San Luis Potosi,
Sinaloa,
Tamaulipas,
Zacatecas).
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Barisia herrerae
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Ocuilan Alligator Lizard, (Herrera's Alligator Lizard)
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Ocuilan-Alligatorschleiche
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Ocuilan-alligatorøgle
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2002 | |
Barisia herrerae Zaldívar-Riveron & Nieto-Montes de Oca |
Remarks:
Not listed for Morelos by Lemos-Espinal & Smith (2020).
Distribution:
Mexico
(Mexico State,
Morelos).
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Barisia imbricata
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Transvolcanic Alligator Lizard, Pococatepetl Imbricate Alligator Lizard, (Imbricate Alligator Lizard)
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Pococatepetl-Alligatorschleiche
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Pococatepetl-alligatorøgle
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1828 | |
Gerrhonotus imbricatus Wiegmann |
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Barissia imbricata Gray 1845 |
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1833 | |
Gerrhonotus lichenigerus Wagler (Smith & Taylor 1950) |
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1834 | |
Gerrhonotus adspersus Wiegmann (Smith & Taylor 1950) |
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1858 | |
Gerrhonotus olivaceus Baird (Smith & Taylor 1950) |
Remarks:
Previously included ciliaris, jonesi, levicollis, and planifrons.
Records of imbricata from Colima, Jalisco, and Nayarit are herein referred to jonesi, based on map in
López-Estrada, Samacá-Sáenz, Zaldívar-Riverón, Gutiérrez-Rodríguez, Jasso-Martínez, Benites, Salinas-Ramos, McCormack & Bryson (2026).
Not mentioned for Queretaro by Cruz-Elizalde, Ramírez-Bautista, Hernández-Salinas, Berriozabal-Islas & Wilson (2019) or for
San Luis Potosi by Lemos-Espinal & Dixon (2013) or Lemos-Espinal, Smith & Woolrich-Pina (2018), but both states are included herein based on the map in
López-Estrada, Samacá-Sáenz, Zaldívar-Riverón, Gutiérrez-Rodríguez, Jasso-Martínez, Benites, Salinas-Ramos, McCormack & Bryson (2026).
Distribution:
Mexico
(Distrito Federal,
Guanajuato,
Guerrero,
Hidalgo,
Mexico State,
Michoacan,
Morelos,
Oaxaca,
Puebla,
Queretaro,
San Luis Potosi,
Tlaxcala,
Veracruz).
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Barisia jonesi
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Michoacan Alligator Lizard, (Jones' Alligator Lizard, Jones' Imbricate Alligator Lizard)
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Michoacan-Alligatorschleiche
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Michoacan-alligatorøgle
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1982 | |
Barisia imbricata jonesi Guillette & Smith |
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Barisia jonesi Smith, Burg & Chiszar 2002 |
Remarks:
Previously restricted to Michoacan.
Now includes records formerly regarded as western populations of imbricata
(López-Estrada, Samacá-Sáenz, Zaldívar-Riverón, Gutiérrez-Rodríguez, Jasso-Martínez, Benites, Salinas-Ramos, McCormack & Bryson 2026).
Records of imbricata from Colima and Nayarit are tentatively referred to jonesi.
Distribution:
Mexico
(Colima,
Jalisco,
Michoacan,
Nayarit).
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Barisia levicollis
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Chihuahuan Alligator Lizard, Sierra Madre Alligator Lizard
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Chihuahua-Alligatorschleiche
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Chihuahua-alligatorøgle
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1890 | |
Barissia levicollis Stejneger |
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Gerhonotus levicollis Schmidt 1953 |
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Gerhonotus imbricatus levicollis Wermuth 1969 |
Distribution:
Mexico
(Chihuahua).
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Barisia planifrons
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Oaxacan Alligator Lizard, Oaxacan Imbricate Alligator Lizard
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Oaxaca-Alligatorschleiche
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Oaxaca-alligatorøgle
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1879 | |
Gerrhonotus planifrons Bocourt |
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Barisia planifrons Tihen 1949 |
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Barisia imbricata planifrons Smith & Taylor 1950 |
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Gerrhonotus imbricatus planifrons Wermuth 1969 |
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Barisia planifrons Smith, Burg & Chiszar 2002 |
Distribution:
Mexico
(Oaxaca).
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Barisia rudicollis
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Rough-necked Alligator Lizard
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Rauhnacken-Alligatorschleiche
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Ruhalset Alligatorøgle
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1828 | |
Gerrhonotus rudicollis Wiegmann |
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Barissia rudicollis Gray 1845 |
Remarks:
The single known record from Morelos (McCoy & Fox 1992) may represent herrerae (Zaldívar-Riveron & Nieto-Montes de Oca 2002).
Distribution:
Mexico
(Mexico State,
Michoacan,
Morelos).
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