Reptilia · Squamata
Amphisbaena carvalhoiGans, 1965
Carvalho Worm Lizard
Photograph by Gustavo Sandres, CC BY-SA, via iNaturalist
A burrowing lizard from the Neotropic region, reaching 129 mm snout to vent.
Reptilia › Squamata › Amphisbaenidae › Amphisbaena
- Grows to
- 129mm
- greatest recorded
- Lives
- Fossorial
- Red List
- Endangered
Longer than only 3% of all species in Amphisbaenidae 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 107 to 810 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
24 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
- Endangered
- Status assessed · the year the Red List last looked
- 2012
- Red List criteria
- B1ab(iii)
The animal itself
- Limbs
- None
- Venomous
- No
- Fangs
- None
Size
- Length snout to vent · greatest recorded
- 129mm5 in
- Length snout to vent · adult female mean
- 121mm4.75 in
- Largest female · snout to vent
- 121mm4.75 in
max 129 mm SVL (Feldman et al. 2016)
snout-vent length; the source column mixes this with straight carapace length
How it lives
- Where it lives
- Fossorial
- Habitat
- Shrubland
- Biome
- Deserts & Xeric Shrublands
- Region
- Neotropic
- Mainland or island
- Mainland
- Elevation · above sea level
- 1030–1040m
- Range size
- 1086km²
Rodda 2020
1035 (Gans 1035)
Naming and history
- Suborder
- Amphisbaenia
- Infraorder
- Amphisbaenia (Laterata)
- Subspecies
- No
- Described by
- Gans
- Moved to another genus · since it was first described
- No
- Described in
- 1965
- Type locality
- Brazil
Keeping one
Carvalho Worm Lizard is assessed as Endangered on the IUCN Red List. Species at risk in the wild are often covered by CITES and by national law, which decide what may be bought, sold, moved across a border or kept at all — and captive-bred and wild-caught animals are usually treated differently. Check the rules where you are before acquiring one. Nothing below is a judgement about keeping this species; it is what a published welfare standard says about space, and what the animal itself was measured doing.
20.5 in × 20.5 in × 12.5 in(52 × 52 × 32 cm)
Minimum length × width × height, for one animal. Bigger is always better. Substrate at least 2.5 in (7 cm) deep.
The standard sizes ground-dwelling species at 4 × 4 × 2.5 times snout-vent length.
Burrows, so substrate deep enough to dig in matters as much as floor area.
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 5 in (129 mm), at 4 × 4 × 2.5 times it, following the German federal welfare standard — how this is worked out.
No preferred body temperature has been recorded for Carvalho Worm Lizard. Rather than repeat a number from a care sheet, this page leaves it out.
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 · snout to vent
- — Hatchling length · nose to tail
- — Largest juvenile · snout to vent
- — Largest juvenile · shell length
- — Egg length
- — Egg width
- — Body mass · greatest
- — Body mass · a typical adult
- — Body mass · adult female, mean
- — Body mass at hatching
- — Longest recorded life
- — Preferred body temperature · chosen in a laboratory gradient
- — Body temperature when active · measured in the wild
- — Diet
- — Eats arthropods
- — Eats vertebrates
- — Eats plant matter
- — How it hunts
- — Active
- — Reproduction
- — How the young develop
- — Gestation or incubation
- — Average clutch
- — Smallest clutch recorded
- — Largest clutch recorded
- — Mean clutch · smallest reported
- — Mean clutch · largest reported
- — Clutches in a year
- — Clutches a year · fewest
- — Clutches a year · most
- — 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
- — Body temp in the wild · lowest mean recorded
- — Body temp in the wild · highest mean recorded
- — Colour on the back
- — Pattern on the back
- — Pupil
- — Sex decided by
- — Population trend
- — Active season · shortest recorded
- — Active season · longest recorded
- — Density · lowest recorded
- — Density · highest recorded
- — Home range · largest recorded
- — Active in
Others in Amphisbaenidae
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). Amphisbaena carvalhoi. Retrieved 2026-09-08, from https://www.allanglescreatures.com/species/amphisbaena-carvalhoi
@misc{amphisbaena_carvalhoi_2026,
title = {Amphisbaena carvalhoi},
author = {{The Reptile & Amphibian Encyclopedia}},
year = {2026},
url = {https://www.allanglescreatures.com/species/amphisbaena-carvalhoi}
}Sources
- Meiri, S. (2024). SquamBase — a database of squamate (Reptilia: Squamata) traits. Global Ecology and Biogeography. Public domain (CC0).
- Catalogue of Life (dataset 3LR), used under CC BY.
- Oskyrko, O. et al. (2024). ReptTraits: a comprehensive dataset of ecological traits in reptiles. Scientific Data. Used under CC BY 4.0.