Description of a new genus and three new species of Otothyrinae (Siluriformes, Loricariidae)

  title={Description of a new genus and three new species of Otothyrinae (Siluriformes, Loricariidae)},
  author={F{\'a}bio Fernandes Roxo and Gabriel S. C. Silva and Luz Eneida Ochoa and Cl{\'a}udio Oliveira},
  pages={103 - 134}
Abstract The genus Hisonotus was resurrected as a member of the tribe Otothyrini (actually subfamily Otothyrinae). However, phylogenetic studies based on morphological and molecular data showed that Hisonotus is not monophyletic and independent lineages can be identified, such as the group composed of the species Hisonotus insperatus, Hisonotus luteofrenatus, Hisonotus oliveirai, Hisonotus paresi and Hisonotus piracanjuba, a lineage unrelated to that containing the type species of the genus… 

New small-sized species of Astyanax (Characiformes: Characidae) from the upper rio Paraguai basin, Brazil, with discussion on its generic allocation

The discovery of a new species of Astyanax in an underwater tourist point relatively near a large urban center underscores that even fish species daily observed by hundreds of people in limpid waters may lack a formal taxonomic identity.

New species of Curculionichthys (Siluriformes: Loricariidae) from the eastern Guiana Shield.

A new species of Curculionichthys from northern Brazil that can be distinguished from congeners by the irregular concentration of chromatophores that cover the anal-fin origin and adjacent region, and distal portions of the first unbranched anal- fin ray is described.

A new species of Curculionichthys (Siluriformes: Loricariidae) from the north edge of the Brazilian Shield, lower Amazon basin

A close examination of the species of Curculionichthys revealed the presence of hyperthrophied odontodes on both dorsal and ventral margins of the snout tip, which are illustrated by electronic microscopy.

Effect of burrowing cymothoid parasitism on loricariids

A New Species of Curculionichthys (Siluriformes: Hypoptopomatinae) from the Western Border of the Brazilian Shield, Madeira River Basin, Brazil

The new species represents the first record of the genus Curculionichthys in the Madeira River basin and is the most westerly distribution in the Amazon.

“More than meets the eye”: phylogeographic inferences and remarkable cryptic diversity and in endemic catfish Parotocinclus (Loricariidae: Hypoptopomatinae) from neglected and impacted basins in South America

The phylogenetic reconstruction, haplotype network and species delimitation algorithms revealed three conspicuous and restricted molecular operational units (MOTUs) within P. cristatus, resulting in deep genetic divergence when compared to the other lineages.

Fish species (Osteichthyes: Actinopterygii) from two tributaries of the Rio do Peixe basin, Tupã municipality, São Paulo state, Brazil

The Rio Pitangueira and the Ribeirao Santa Terezinha are right margin affluents of the Rio do Peixe, upper Rio Parana basin, Sao Paulo state, Brazil. Fourteen non-temporally standardized samplings


  • P. A. Buckup
  • Environmental Science, Biology
    Oecologia Australis
  • 2021
The increase in the knowledge of Neotropical fish diversity was associated with the significant growth of hypotheses about their evolution and contributed to the understanding of the phylogenetic history of fish comunities and their structure in small streams.

Inventory of the fish fauna from Ivaí River basin, Paraná State, Brazil

The Ivai River basin is subjected to various anthropogenic interferences such as pollution, eutrophication, siltation, construction of dams, flood control, fisheries, species introduction and release of fingerlings, which raise concerns about biodiversity of Brazilian inland waters especially regarding the fish fauna.

An inventory of coastal freshwater fishes from Amapá highlighting the occurrence of eight new records for Brazil

This paper presents a compilation of the freshwater fish diversity sampled in fifteen sites covering two major Amapá ecoregions during the dry season of 2015, providing new information for future conservation status evaluations.



A New Species of Cascudinho of the Genus Hisonotus (Siluriformes: Loricariidae: Hypoptopomatinae) from the Upper Rio Tapajós Basin, Brazil

The new taxon is distinguished from its congeners by a unique color pattern, whose most striking features are: two elliptical white spots, anterior to nostrils; predorsal region darkly pigmented with five unpigmented spots arranged as anteriorly pointed chevron; and a rostrocaudally elongate cross along most of the caudal peduncle.

Systematics of Pseudotothyris (Loricariidae: Hypoptopomatinae)

A phylogenetic analysis and taxonomic revision of the Pseudotothyris genus are performed, which corroborate the monophyly of the genus, which is supported by a uniquely derived synapomorphy: anterior snout odontodes well developed only on dorsal region.

A New Species of Hisonotus (Siluriformes, Loricariidae) of the Upper Río Uruguay Basin

Abstract A new species of the hypoptopomatine genus Hisonotus (Loricariidae) is described from a small tributary of the upper río Uruguay basin near the border between Uruguay and Brazil. The new

Taxonomic review of Hisonotus Eigenmann & Eigenmann (Siluriformes: Loricariidae: Hypoptopomatinae) from the laguna dos Patos system, southern Brazil

The species of Hisonotus from the laguna dos Patos system are reviewed, two species with wide distributions are redescribed and a junior synonym of H. laevior is considered.

Four new species of Hisonotus (Siluriformes: Loricariidae) from the upper rio Uruguay, southeastern South America, with a review of the genus in the rio Uruguay basin

Four new species of Hisonotus are described from the upper course of the rio Uruguay basin in Brazil and their distributions are discussed under biogeographic patterns previously proposed for the r Rio Uruguay basin.

A new species of Hisonotus (Siluriformes, Loricariidae) from rio São Francisco basin, Brazil

The new species can be distinguished from congeners by having a unique coloration pattern of caudal fin with one black spot extending from its origin to the ventral lobe and two dark spots at the end of the lobe’s rays.

Description of two new species of Hisonotus Eigenmann & Eigenmann, 1889 (Ostariophysi, Loricariidae) from the rio Paraná-Paraguay basin, Brazil

Both new species of Hisonotus described from the rio Paraná-Paraguay basin in Brazil are distinguished from their congeners by characters related to head length and depth, orbital diameter, suborbital depth, caudal peduncle depth, pectoral-fin spine length, snout length and counts of teeth.

Molecular phylogeny of the Neoplecostominae and Hypoptopomatinae (Siluriformes: Loricariidae) using multiple genes.

Hisonotus acuen, a new and phenotypically variable cascudinho (Siluriformes, Loricariidae, Hypoptopomatinae) from the upper rio Xingu basin, Brazil

Abstract A new species of Hisonotus is described from the headwaters of the rio Xingu. The new species is distinguished from its congeners by having a functional V-shaped spinelet, odontodes not

A new species of Microlepidogaster (Siluriformes: Loricariidae: Hypoptopomatinae) from the upper rio Paraná basin, Brazil

The new species, Microlepidogaster longicolla, is described from the rio Sao Joao of the upper rio Parana basin near Brasilia, in central Brazil, and shows a remarkable suite of secondary sexually dimorphic characters, involving the presence of a conical urogenital papilla in males and the existence of a fleshy flap along the dorsal margin of first thickened pelvic-fin ray of males.