Biology:Pseudotothyris
Pseudotothyris is a genus of freshwater ray-finned fishes belonging to the family Loricariidae, the suckermouth armoured catfishes, and the subfamily Hypoptopomatinae, the cascudinhos. The catfishes in this genus are endemic to Brazil.
Taxonomy
Pseudotothyris was first formally proposed as a genus in 1984 by the Brazilian ichthyologists Heraldo A. Britski and Julio C. Garavello with Otocinclus obtusus, a species described by 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, designated as its type species.[1][2] Eschmeyer's Catalog of Fishes classified the genus Pseudotocinclus in the subfamily Hypoptopomatinae, the cascudinhos, within the suckermouth armored catfish family Loricariidae.[1]
Some authorities place this genus in the tribe Otothyrini, in which Pseudotothyris has a sister group relationship with Otothyris. In turn, Otothyropsis has a sister group relationship with the clade Otothyris plus Pseudotothyris.[3] These three genera and Schizolecis share unique specializations of the cranium associated with an enlarged swimbladder capsule. The degree of development of the swimbladder capsule in these genera was not found in any other member of the Otothyrini.[3]
Etymology
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.[4]
Species
Pseudotothyris contains the following valid species;[2]
- (Miranda Ribeiro 1911) Martins, Britski & Langeani, 2014
- Pseudotothyris janeirensis Pseudotothyris ignota
- Britski & Garavello, 1984 Pseudotothyris obtusa
Characteristics
Pseudotothyris are characterised by having short bodies, eyes placed on the side of the head with the orbit created by the three bones which surround it. There are three large plates border the lower part of the head ate its rear. The tip of thes nout has small odontodes on it.[5] That these odontodes are only well developed on the upper part of the snout is the characteristic which is shared by the species in this genus and which characterise it.[6]
Distribution
Pseudotothyris catfishes are found in coastal basins in southern and southeastern Brazil between the states of Rio de Janeiro and Santa Catarina.[6]
References
- ↑ 1.0 1.1 Cite error: Invalid
<ref>tag; no text was provided for refs namedCof family - ↑ 2.0 2.1 Eschmeyer, William N.; Fricke, Ron; van der Laan, Richard, eds. "Species in the genus Pseudotothyris". California Academy of Sciences. http://researcharchive.calacademy.org/research/ichthyology/catalog/fishcatget.asp?tbl=species&genus=Pseudotothyris.
- ↑ 3.0 3.1 Ribeiro, Alexandre C.; Carvalho, Murilo; Melo, Alex L. A. (2005). "Description and relationships of Otothyropsis marapoama, a new genus and species of Hypoptopomatine catfish (Siluriformes: Loricariidae) from rio Tietê basin, southeastern Brazil". Neotropical Ichthyology 3 (4): 489–498. doi:10.1590/S1679-62252005000400006. http://www.scielo.br/pdf/ni/v3n4/v3n4a06.pdf.
- ↑ Christopher Scharpf (14 May 2026). "Family LORICARIIDAE: Subfamily HYPOPTOPOMATINAE Eigenmann & Eigenmann 1890 (Cascudinhos)". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf. https://etyfish.org/hypoptopomatinae/.
- ↑ Heraldo A. Britski; Julio C. Garavello (1984). "Two new southeastern Brazilian genera of Hypoptopomatinae and a redescription of Pseudotocinclus Nichols, 1919 (Ostariophysi, Loricariidae)". Papéis Avulsos do Departamento de Zoologia, Secretaria da Agricultura, São Paulo 35 (21): 225-241. https://researcharchive.calacademy.org/research/ichthyology/catalog/getref.asp?id=5166#:~:text=Britski%2C%20H.%20A,21)%3A%20225%2D241..
- ↑ 6.0 6.1 Fernanda O. Martins; Heraldo A. Britski; Francisco Langeani (2014). "Systematics of Pseudotothyris (Loricariidae: Hypoptopomatinae)". Zoological Journal of the Linnean Society 170 (4): 822–874. doi:10.1111/zoj12107.
Wikidata ☰ Q5029351 entry
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