Article · Wikipedia archive · Last revised Jun 2, 2026

Crocodilurus

Crocodilurus is a monotypic lizard genus consisting of one species, Crocodilurus amazonicus, belonging to the family Teiidae. Its common name is the crocodile tegu, due to its appearance and fondness for water, and is locally known as the jacarerana. This semi-aquatic, predatory lizard has a flattened, paddle-like tail, enabling it to swim with ease.

Last revised
Jun 2, 2026
Read time
≈ 2 min
Length
390 w
Citations
10
Source
Crocodile tegu
Artist's historical rendition.
CITES Appendix II2
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Family: Teiidae
Genus: Crocodilurus
Spix, 18254
Species:
C. amazonicus
Binomial name
Crocodilurus amazonicus
Spix, 18253

Crocodilurus is a monotypic lizard genus consisting of one species, Crocodilurus amazonicus, belonging to the family Teiidae (tegus, ameivas and whiptails). Its common name is the crocodile tegu, due to its appearance and fondness for water, and is locally known as the jacarerana. This semi-aquatic, predatory lizard has a flattened, paddle-like tail, enabling it to swim with ease.15

Figurative name

The crocodile tegu has no close relation to crocodilians. The name Crocodilurus amazonicus ("Amazonian little crocodile") is only an analogy: It is a predatory reptile well adapted to living and hunting in water.

Distribution

C. amazonicus is found in the Amazon Basin and the Guiana Shield in South America.15

Diet

C. amazonicus preys upon arthropods, fish, amphibians, and reptiles.15

Amazonas, Brazil
Amazonas, Brazil source ↗
References

References

  1. Martins, M. (2010). "Crocodilurus amazonicus". The IUCN Red List of Threatened Species. 2010. IUCN: e.T178328A7524182. doi:10.2305/IUCN.UK.2010-4.RLTS.T178328A7524182.en. Retrieved 14 January 2018.
  2. "Crocodilurus amazonicus (Spix, 1825)". Species+. UN Environment Programme World Conservation Monitoring Centre. Retrieved 25 October 2025.
  3. de Massary & Hoogmoed (2001)
  4. Harvey, Ugueto & Gutberlet (2012), pp. 133, 134
  5. Martins, M. (2006). "Life in the water: Ecology of the jacarerana lizard, Crocodilurus amazonicus". Herpetological Journal. 16: 171–177.
Further reading

Further reading

External links

Data related to Crocodilurus at Wikispecies