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

The Rio Pitangueira and the Ribeirão Santa Terezinha are right margin affluents of the Rio do Peixe, upper Rio Paraná basin, São Paulo state, Brazil. Fourteen non-temporally standardized samplings were made at four sampling sites along the Rio Pitangueira and at one sampling site on Ribeirão Santa Terezinha using cast nets, trawl net, hand net, and fishing rod and hook. Thirty fish species were collected, belonging to five orders, 13 families, and 25 genera. Of these, one is probably new to science and one is a rare species

A new species of Ancistrus Kner, 1854 (Siluriformes: Loricariidae) from rio Madeira basin, Amazonas State, Brazil

During the Mosaico do Apuí expedition in 2006, a new species of Ancistrus was found in the rio Sucunduri, a large tributary of the rio Madeira basin in south Amazonas State. The new species has a unique color pattern for the genus and is distinguished by the presence of alternate light and dark vertical bars on the trunk. Other Ancistrini genera have species with a similar color pattern, but the new species is clearly distinguished by a lack of plates on the snout and presence of fleshy tentacles on the snout as in all Ancistrus representatives. We also provide comments on the taxonomic status of the A. bolivianus, A. heterorhynchus and A. marcapatae. © 2019 Sociedade Brasileira de Ictiologia. All Rights Reserved

First records of the introduced sailfin catfish Pterygoplichthys in the United Kingdom

Sailfin catfish, Pterygoplichthys, is a genus of fish common in the ornamental aquarium trade. Originally from South America, they are now invasive in numerous locations around the globe. We report the first records of Pterygoplichthys in the United Kingdom. We captured one Pterygoplichthys joselimaianus and one Pterygoplichthys pardalis in an artificial side channel of the River Kelvin in Glasgow, Scotland on 30 August 2021 and 6 September 2021, respectively. Further monitoring and public education will be important as river temperatures increase to prevent establishment of these species, which have become invasive in other parts of the world

Peixes do baixo rio Iguaçu

O rio Iguaçu nasce na confluência dos rios Atuba e Irai, e desemboca no rio Paraná, em Foz do Iguaçu. A ictiofauna deste rio, desde os primeiros trabalhos realizados, sempre foi considerada pobre e de pequeno porte, entretanto, apresenta um elevado grau de endemismo favorecido pelo surgimento das Cataratas do Iguaçu, que exerceram um papel fundamental neste processo. Esta obra busca uma fonte aglutinadora, mas sintetizada, sistematizada, especializada e atualizada das informações publicadas, até o momento, sobre a ictiofauna do baixo rio Iguaçu, fornecendo chaves de identificação, caracterizações morfológicas, fotos, dados sobre a biologia e distribuição geográfica das espécies registradas na região, além de um glossário com termos técnicos

Redescription of ancistrus greeni (Siluriformes: Loricariidae), and description of a new species from the río madre de dios basin, peru

A new species of Ancistrus is described from minor tributaries of the río Madre de Dios basin (Cusco-Madre de Dios-Puno), in Peru. The new species shares with A. greeni an uncommon unicusp dentition; but it is distinguished from A. greeni by a larger orbital diameter, deeper caudal peduncle, and larger adipose-fin spine. The redescription of A. greeni is provided, and its recognition along with the discovery of this new species increases to five the officially number of Ancistrus species from the río Madre de Dios basin. The lectotype and paralectotype of A. greeni are provided. © 2020 The Authors. Diversity and Distributions Published by SBI

Araichthys loro, a new genus and species of suckermouth armored catfish from the upper rio Tapajós basin, Brazil (Siluriformes: Loricariidae)

Araichthys loro, a new genus and species of the suckermouth armored catfish family Loricariidae, is described from the rio Papagaio and tributaries, rio Tapajós basin, Mato Grosso State, central Brazil. Araichthys is distinguished from all other genera of the Ancistrini by features of body and head plates, odontodes of breeding males, and osteology, and by the absence of an adipose fin. A phylogenetic analysis of morphological characters obtained Araichthys as part of a monophyletic group that also includes Pseudolithoxus, Ancistrus and Lasiancistrus based on the presence of a large gap with a strut between the anterior process of the pterotic-supracleithrum and its main body, three rows of plates at thinnest part of caudal peduncle, fleshy tentacles on snout with a sheath partially detached from odontodes, and small tentacles on pectoral fins partially detached from odontodes. © 2016 by Verlag Dr. Friedrich Pfeil, München, Germany

A new Tatia (Ostariophysi: Siluriformes: Auchenipteridae) from the rio Iguaçu basin, Paraná State, Brazil

A new species of Tatia is described from the lower rio Iguaçu basin, Paraná State, Brazil. The new species is distinguishable from congeners by having large, irregular pale blotches over dark brown base coloration, absent longitudinal stripe, caudal fin with round to striate dark brown spots over light base in adults or entirely dark in juveniles, and by having a long humeral process. Sexual dimorphism of the new species is marked by differences among genital and urinary apertures, size proportions between upper and lower lobe of caudal fin, and size, width and presence of antrorse and retrorse spines on anal-fin rays

Fish, Barra Bonita River, upper Paraná River basin, state of Paraná, Brazil

The Barra Bonita River is an affluent of the left margin of the Ivaí River, upper Paraná River basin. Fish samples were conduced in November 2006 (spring) and in February 2007 (summer), in three sampling stations along the Barra Bonita River, using gill nets, casting nets, and sieves. Thirty one fish species were collected, which belong to five orders, 14 families, and 25 genera. Among them, five are probably new to science