Reptilia · Squamata
Barisia imbricataWiegmann, 1828
Imbricate Alligator Lizard
Photograph by Juan Cruzado Cortés, CC BY-SA, via iNaturalist
A ground-dwelling, day-active, meat-eating lizard from the Nearctic region, reaching 158 mm snout to vent.
Also called Transvolcanic Alligator Lizard.
Once published as Gerrhonotus imbricatus — those names reach this page.
Reptilia › Squamata › Anguidae › Barisia
- Grows to
- 158.3mm
- greatest recorded
- Eats
- Carnivorous
- Active
- Diurnal
- Lives
- Terrestrial
Longer than 69% of all species in Anguidae anyone has measured.
The bar is the rank itself: its length is the share of the family this animal exceeds. The chart below is the family’s real spread, on a logarithmic scale because body length here runs from 72 to 610 mm. The solid rule is this animal. Every bar is a count of real species, and nothing on this figure is estimated.
What is known
38 sourced facts, each taken from a named scientific dataset. How to read these.
Cited from a dataset unless a row is marked otherwise.
Standing in the world
- Still living
- Extant
- Conservation status
- Least Concern
- Status assessed · the year the Red List last looked
- 2007
The animal itself
- Limbs
- Four legs
- Venomous
- No
- Fangs
- None
- Preferred body temperature · chosen in a laboratory gradientmeasured
- 27.7–29.4°C82–85 °F
- Body temperature when active · measured in the wild
- 26.6°C80 °F
- Body temp in the wild · mean, when active
- 22.4–26.6°C72–80 °F
mean body temperature of active individuals in nature
body temperature of active animals in nature
Size
- Length snout to vent · greatest recorded
- 158.3mm6.25 in
- Length snout to vent · adult female mean
- 110mm4.25 in
- Largest female · snout to vent
- 110mm4.25 in
- Hatchling length · snout to vent
- 32.4mm1.25 in
- Largest juvenile · snout to vent
- 32.1mm1.25 in
- Body mass · greatestcomputed
- 77.4g2.7 oz
- Body mass at hatchingmeasured
- 0.64g0.02 oz
max 158.25 mm SVL (Feldman et al. 2016)
snout-vent length; the source column mixes this with straight carapace length
computed from length by a family-level allometric equation, not weighed
How it lives
- Diet
- Carnivorous
- How it hunts
- Active foraging
- Active
- Diurnal
- Where it lives
- Terrestrial
- Habitat
- Forest, Grassland
- Biome
- Tropical & Subtropical Coniferous Forests
- Region
- Nearctic
- Mainland or island
- Mainland
- Elevation · above sea level
- 1200–4060m
- Range size
- 485,152km²
insects and lizards (Guillette and Smith 1982, Dixon and Lemos-Espinal 2010, Zaldivar Riveron et al. 2002 - Sceloporus grammicus and S. aeneus)
active foraging
e.g., Ramirez-Bautista et al. 2014, Lara-Resendiz et al. 2014
(e.g., Ramirez-Bautista et al. 2014, Lara-Resendiz et al. 2014),
1900-4060 (Ramirez-Bautista et al. 2014), 1800-3000 (Sunny et al. 2017)
Breeding
- Reproduction
- Viviparous
- Average clutch
- 11.45eggs
- Eggs or young per clutch
- 5–20eggs
- Mean clutch
- 6.9–16eggs
- Clutches a year
- 1per year
16 (Dashevsky et al. 2013), maximum of 20 is a conservative estimate from Dashevsky et al. 2013, Figure 4, 5-10 (Barisia ciliaris, Lemos-Espinal and Dixon 2013), 6-10, but can be as lmany as 15 (Zaldivar Riveron et al. 2002), max 20 (Ramirez-Bautista et al. 2014), 2, with a clutch of 20 each
Naming and history
- Suborder
- Sauria
- Infraorder
- Anguimoprha
- Subspecies
- No
- Described by
- Wiegmann
- Moved to another genus · since it was first described
- Yes
- Described in
- 1828
- Type locality
- Mexico
Keeping one
2 ft 1 in × 2 ft 1 in × 15.5 in(63 × 63 × 40 cm)
Minimum length × width × height, for one animal. Bigger is always better.
The standard sizes ground-dwelling species at 4 × 4 × 2.5 times snout-vent length.
Mindestanforderungen an die Haltung von Reptilien (Sachverständigengutachten), German Federal Ministry for Nutrition, Agriculture and Forestry, Animal Welfare Division, 10 January 1997. The standard states these floor areas are recommendations rather than binding limits.
From this animal’s own snout-vent length of 6.25 in (158.3 mm), at 4 × 4 × 2.5 times it, following the German federal welfare standard — how this is worked out.
In a laboratory thermal gradient this species settled at 82–85 °F (27.7–29.4 °C).
Preferred body temperature, recorded in a laboratory gradient where the animal could choose freely. A measurement of the animal, not a setting for a thermostat.
Feeding
A prey item should be no wider than the space between the animal's eyes.
Widely used across reptile husbandry references. The stated reason is that the gap approximates the width of the throat, so wider prey is associated with impaction. This is established practice, not a measurement.
9kJ per day
Worked out for an animal of 77 g, the heaviest recorded for Imbricate Alligator Lizard — so it is the top of the range, not a figure for a particular animal. Weigh yours and the number will be lower.
An upper estimate, not a feeding target, and not veterinary advice. The equation covers only what an animal burns staying alive, so a growing, gravid or recovering animal needs more — and it was measured on wild animals, which move far more than one in an enclosure. Body condition and a vet who knows the species are what a feeding decision should rest on. Where this comes from.
What nobody knows
These are not gaps in our research. No scientific dataset records them for this species — and saying so is information you cannot get from a reference that simply leaves a field out.
- — Length snout to vent · adult male mean
- — Length snout to vent · adult mean
- — Length nose to tail · greatest recorded
- — Female length · mean, nose to tail
- — Length nose to tail · adult male mean
- — Length nose to tail · adult mean
- — Largest male · snout to vent
- — Largest female · shell length
- — Largest male · shell length
- — Hatchling length · nose to tail
- — Largest juvenile · shell length
- — Egg length
- — Egg width
- — Body mass · a typical adult
- — Body mass · adult female, mean
- — Longest recorded life
- — Eats arthropods
- — Eats vertebrates
- — Eats plant matter
- — How the young develop
- — Gestation or incubation
- — Clutches in a year
- — First breeds from · youngest recorded
- — First breeds by · oldest recorded
- — Hatchling length · smallest recorded
- — Hatchling length · largest recorded
- — Age at first breeding · female
- — Mature from · youngest recorded
- — Mature by · oldest recorded
- — Size at maturity · smallest recorded
- — Size at maturity · largest recorded
- — Colour on the back
- — Pattern on the back
- — Pupil
- — Sex decided by
- — Population trend
- — Red List criteria
- — Active season · shortest recorded
- — Active season · longest recorded
- — Density · lowest recorded
- — Density · highest recorded
- — Home range · largest recorded
- — Active in
Others in Anguidae
- Anzuetoi Arboreal Alligator Lizard
- Argueta Arboreal Alligator Lizard
- Asian Glass Lizard
- Baja California Legless Lizard
- Bakersfield Legless Lizard
- Banded Arboreal Alligator Lizard
- Bogert's Arboreal Alligator Lizard
- Brilliant Arboreal Alligator Lizard
- Buettikofer's Glass Lizard
- California Legless Lizard
- Campbell's Alligator Lizard
- Cedros Island Alligator Lizard
Take this data
Everything on this page is available as data under CC BY 4.0 — use it freely, credit it, no permission needed.
This species as JSON · the whole dataset
Cite this page
The Reptile & Amphibian Encyclopedia (2026). Barisia imbricata. Retrieved 2026-09-08, from https://www.allanglescreatures.com/species/barisia-imbricata
@misc{barisia_imbricata_2026,
title = {Barisia imbricata},
author = {{The Reptile & Amphibian Encyclopedia}},
year = {2026},
url = {https://www.allanglescreatures.com/species/barisia-imbricata}
}Sources
- Meiri, S. (2024). SquamBase — a database of squamate (Reptilia: Squamata) traits. Global Ecology and Biogeography. Public domain (CC0).
- Oskyrko, O. et al. (2024). ReptTraits: a comprehensive dataset of ecological traits in reptiles. Scientific Data. Used under CC BY 4.0.
- Catalogue of Life (dataset 3LR), used under CC BY.