Pseudotothyris obtusa is a species of freshwater ray-finned fish belonging to the family Loricariidae, the suckermouth armoured catfishes, and the subfamily Hypoptopomatinae, the cascudinhos. This catfish is endemic to Brazil.
| Pseudotothyris obtusa | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Siluriformes |
| Family: | Loricariidae |
| Genus: | Pseudotothyris |
| Species: | P. obtusa |
| Binomial name | |
| Pseudotothyris obtusa (Miranda-Ribeiro, 1911)[2] | |
| Synonyms[2] | |
| |
Taxonomy
editPseudotothyris obtusa was first formally described as Otocinclus obtusus in 1911 by the Brazilian ichthyologist and herpetologist Alípio de Miranda-Ribeiro in 1911 with its type locality given as Fonte Grande, a seedling nursery in Pedrinhas on Ilha Comprida in the Brazilian state of São Paulo.[2] In 1984 the Brazilian ichthyologists Heraldo A. Britski and Julio C. Garavello proposed the new genus Pseudotothyris and designated Otocinclus obtusus as its type species. Eschmeyer's Catalog of Fishes classified the genus Pseudotothyris in the subfamily Hypoptopomatinae, the cascudinhos, within the suckermouth armored catfish family Loricariidae.[3]
Etymology
editPseudotothyris obtusa is classified in the genus Pseudotothyris, this name prefixes pseudo-, meaning “false”, onto Otothyris, as these fishes appear to bear some resemblance to that genus but that resemblance is misleading. The specific name, obtusa, is Latin meaning "blunt" or "dull", Ribeiro did not explain this but it may be an allusion to the small platelet on teh snout whivh have small, so blunter, spines on them.[4]
Description
editPseudotothyris obtusa has its dorsal fin between with 8 and 10 soft rays with 6 or 7 in its anal fin. This species is told apart from other species in its genus by having fewer pharyngeal teeth, a snout covered in plates and having scattered plates on the abdomen instead of having a completely naked abdome. It also lacks any saddle marks and has the odontodes on the lateral plates neatly arranged in rows. This species reaches a standard length of 4 cm (1.6 in).[5]
Distribution and habitat
editPseudotothyris obtusa is endemic to Brazil where it is found in coastal drainages in the southeast of that country from São Sebastião in the Brazilian state of São Paulo to Ilha de Superagui, Paranaguá Bay in the state of in Paraná.[5] It is found among emergent vegetation, fallen wood and leaf litter.[1]
References
edit- Froese, Rainer; Pauly, Daniel (eds.). "Pseudotothyris obtusa". FishBase. December 2011 version.
- 1 2 Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio) (2022). "Pseudotothyris obtusa". IUCN Red List of Threatened Species (in Brazilian Portuguese). 2022 e.T187259A1825504. doi:10.2305/IUCN.UK.2022-1.RLTS.T187259A1825504.pt. Retrieved 21 May 2026.
- 1 2 3 Fricke, Ron; Eschmeyer, William N. & van der Laan, Richard (eds.). "Species in the genus Pseudotothyris". Catalog of Fishes. California Academy of Sciences. Retrieved 21 May 2026.
- ↑ Fricke, Ron; Eschmeyer, William N. & van der Laan, Richard (eds.). "Genera in the family Hypoptopomatinae". Catalog of Fishes. California Academy of Sciences. Retrieved 21 May 2026.
- ↑ Christopher Scharpf (14 May 2026). "Family LORICARIIDAE: Subfamily HYPOPTOPOMATINAE Eigenmann & Eigenmann 1890 (Cascudinhos)". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf. Retrieved 21 May 2026.
- 1 2 Froese, Rainer; Pauly, Daniel (eds.). "Pseudotothyris obtusa". FishBase. February 2026 version.
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