Rhinotocinclus, new genus

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bekateen
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Rhinotocinclus, new genus

Post by bekateen »

Rhinotocinclus, new genus
Rhinotocinclus discolor, new species
Rhinotocinclus pilosus, new species
Rhinotocinclus isabelae, new species
Rhinotocinclus marginalis, new species
Rhinotocinclus loxochelis, new species


Reis RE, Lehmann A. P. (2022). A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species. Neotrop Ichthyol., 20(2):e220002. https://doi.org/10.1590/1982-0224-2022-0002
Abstract
A new genus of Hypopopomatinae armored catfish is described from the northern portions of South America, namely the Amazon, Orinoco and Guianan coastal drainages. The new genus is diagnosed from all remaining hypoptopomatines by having the canal cheek plate on the ventral surface of the head posteriorly elongated and contacting the cleithrum, in addition to other features that distinguish the new genus from specific genera. Five new species are described and 18 species currently allocated in Parotocinclus, Hisonotus, and Curculionichthys are transferred to the new genus and rediagnosed. Parotocinclus amazonensis and P. aripuanensis are considered junior synonyms of P. britskii. The secondary sexual dimorphism of the members of the new genus is detailed and illustrated. Morphological characters are used to delimit four phenotypic groups of species that might have phylogenetic significance, which still have to be properly tested. A key to the species is offered and diagnoses, illustrations, and distribution maps are provided for all species.
Keywords: Biodiversity; Identification key; South America; Systematics; Taxonomy
Resumo
Um novo gênero de cascudo da subfamília Hypopopomatinae é descrito das porções do norte da América do Sul, a saber, as drenagens costeiras da Amazônia, Orinoco e Guiana. O novo gênero é diagnosticado de todos os demais hypoptopomatineos por possuir a placa com canal da bochecha na superfície ventral da cabeça, alongada posteriormente e em contato com o cleitro, além de outras características que distinguem o novo gênero de gêneros específicos. Cinco novas espécies são descritas e 18 espécies atualmente alocadas em Parotocinclus, Hisonotus e Curculionichthys são transferidas para o novo gênero e rediagnosticadas. Parotocinclus amazonensis e P. aripuanensis são considerados sinônimos juniores de P. britskii. O dimorfismo sexual secundário dos membros do novo gênero é detalhado e ilustrado. Caracteres morfológicos são usados para delimitar quatro grupos fenotípicos de espécies que podem ter significado filogenético, que ainda precisam ser devidamente testados. Uma chave para as espécies é apresentada e diagnoses, ilustrações e mapas de distribuição são fornecidos para todas as espécies.
Palavras-chave: América do Sul; Biodiversidade; Chave de identificação; Sistemática; Taxonomia
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Re: Rhinotocinclus, new genus

Post by bekateen »

I believe that Parotocinclus sp(3) is Rhinotocinclus isabelae, and I've made all the species changes to the CLOG. Also, I think that Hisonotus sp`Rio_Xingu` is Rhinotocinclus marginalis.
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Re: Rhinotocinclus, new genus

Post by bekateen »

bekateen wrote: Sun Jul 10, 2022 7:12 pmAlso, I think that Hisonotus sp`Rio_Xingu` is Rhinotocinclus marginalis.
Nope. I spoke with Mark Sabaj and Roberto Reis. They both stated that the fish in Mark's underwater photos are Curculionichthys cf_sabaji, so I've moved the clog entry accordingly. Mark said these were collected in the Xingu at Gorgulho da Rita in swift water.
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Re: Rhinotocinclus, new genus

Post by Jools »

Yes, agreed on the last point, my pics are from there too (note to self, must post these). Still catching up on the rest of the paper. Thanks for all your hard work on this Eric,

Cheers,

Jools
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