Creagrutus petilus

Creagrutus petilus
Conservation status
Least Concern  (IUCN 3.1) [1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Characiformes
Family:	Stevardiidae
Genus:	Creagrutus
Species:	C. petilus
Binomial name
Creagrutus petilus Vari & Harold, 2001

Creagrutus petilus is a species of freshwater ray-finned fish, a characin, belonging to the family Stevardiidae. ^[2]

Distribution

It is native to South America, occurring in the upper Machado River, a right‑bank tributary of the Madeira River. The Madeira is one of the largest tributaries of the Amazon, draining vast portions of Brazil, Bolivia, and Peru. The Machado basin lies in Rondônia, Brazil, and contributes to the hydrological complexity of the Madeira system, which is noted for its diverse habitats ranging from fast‑flowing upland streams to extensive floodplains. The species' presence in the Machado highlights its role within the interconnected ecosystems of the southwestern Amazon basin.

Size

This species reaches a length of 4.9 cm (1.9 in). ^[3]

Etymology

The species name derives from the Latin word for 'thin' or 'slender,' in reference to its relatively elongate body form. ^[4]

References

1. "Creagrutus petilus". IUCN . Retrieved 2025-12-18.
2. Vari, R.P. and A.S. Harold, 2001. Phylogenetic study of the Neotropical fish genera Creagrutus Günther and Piabina Reinhardt (Teleostei: Ostariophysi: Characiformes), with a revision of the Cis-Andean species. Smith. Cont. Zool. 613:1-239.
3. Froese, Rainer; Pauly, Daniel (eds.). "Creagrutus petilus". FishBase . February 2025 version.
4. Christopher Scharpf & Kenneth J. Lazara (22 September 2018). "Family STEVARDIIDAE Gill 1858 (Stevardiids)". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 15 December 2025.