Artigo

Biogeography and species delimitation of the rheophilic suckermouth catfish genus Pseudolithoxus (Siluriformes: Loricariidae), with the description of a new species from the Brazilian Amazon

The rapids-dwelling suckermouth catfish genus Pseudolithoxus was previously only known from the Guiana-Shield-draining Orinoco and Casiquiare river systems of Colombia and Venezuela, but new records have expanded this range considerably further into the Amazon basin of Brazil, and include occurrence...

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Autor principal: Collins, Rupert A.
Outros Autores: Bifi, Alessandro Gasparetto, Oliveira, Renildo Ribeiro de, Ribeiro, Emanuell Duarte, Lujan, Nathan K., Py-daniel, Lúcia Rapp, Hrbek, Tomas
Grau: Artigo
Idioma: English
Publicado em: Systematics and Biodiversity 2020
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/16878
id oai:repositorio:1-16878
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spelling oai:repositorio:1-16878 Biogeography and species delimitation of the rheophilic suckermouth catfish genus Pseudolithoxus (Siluriformes: Loricariidae), with the description of a new species from the Brazilian Amazon Collins, Rupert A. Bifi, Alessandro Gasparetto Oliveira, Renildo Ribeiro de Ribeiro, Emanuell Duarte Lujan, Nathan K. Py-daniel, Lúcia Rapp Hrbek, Tomas The rapids-dwelling suckermouth catfish genus Pseudolithoxus was previously only known from the Guiana-Shield-draining Orinoco and Casiquiare river systems of Colombia and Venezuela, but new records have expanded this range considerably further into the Amazon basin of Brazil, and include occurrences from rivers draining the northern Brazilian Shield. These highly disjunct records are now placed in an evolutionary and phylogeographic context using a dated species tree constructed from mitochondrial (Cytb) and nuclear (RAG1) gene sequence data. Due to mito-nuclear discordance, we also delimit the putative species using statistical coalescent models and a range of additional metrics. We infer that at least two species of Pseudolithoxus are present in the Amazon basin: P. nicoi, previously only recorded from the río Casiquiare, but now also reported from the upper rio Negro, and a new species, which we describe herein from south-draining Guiana Shield and north-draining Brazilian Shield. Our data reject a simple model of Miocene vicariance in the group following uplift of the Uaupés Arch separating the Orinoco and Amazon systems, and instead suggest more complex dispersal scenarios through palaeo-connections in the Pliocene and also via the contemporary rio Negro and rio Madeira in the late Pleistocene. www.zoobank.org/urn:lsid:zoobank.org:pub:46A6BEC1-1A1B-4244-80-A6-FD9CF8DA0384. © 2018, © The Trustees of the Natural History Museum, London 2018. All Rights Reserved. 2020-06-15T21:36:57Z 2020-06-15T21:36:57Z 2018 Artigo https://repositorio.inpa.gov.br/handle/1/16878 10.1080/14772000.2018.1468362 en Volume 16, Número 6, Pags. 538-550 Restrito Systematics and Biodiversity
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
description The rapids-dwelling suckermouth catfish genus Pseudolithoxus was previously only known from the Guiana-Shield-draining Orinoco and Casiquiare river systems of Colombia and Venezuela, but new records have expanded this range considerably further into the Amazon basin of Brazil, and include occurrences from rivers draining the northern Brazilian Shield. These highly disjunct records are now placed in an evolutionary and phylogeographic context using a dated species tree constructed from mitochondrial (Cytb) and nuclear (RAG1) gene sequence data. Due to mito-nuclear discordance, we also delimit the putative species using statistical coalescent models and a range of additional metrics. We infer that at least two species of Pseudolithoxus are present in the Amazon basin: P. nicoi, previously only recorded from the río Casiquiare, but now also reported from the upper rio Negro, and a new species, which we describe herein from south-draining Guiana Shield and north-draining Brazilian Shield. Our data reject a simple model of Miocene vicariance in the group following uplift of the Uaupés Arch separating the Orinoco and Amazon systems, and instead suggest more complex dispersal scenarios through palaeo-connections in the Pliocene and also via the contemporary rio Negro and rio Madeira in the late Pleistocene. www.zoobank.org/urn:lsid:zoobank.org:pub:46A6BEC1-1A1B-4244-80-A6-FD9CF8DA0384. © 2018, © The Trustees of the Natural History Museum, London 2018. All Rights Reserved.
format Artigo
author Collins, Rupert A.
spellingShingle Collins, Rupert A.
Biogeography and species delimitation of the rheophilic suckermouth catfish genus Pseudolithoxus (Siluriformes: Loricariidae), with the description of a new species from the Brazilian Amazon
author2 Bifi, Alessandro Gasparetto
Oliveira, Renildo Ribeiro de
Ribeiro, Emanuell Duarte
Lujan, Nathan K.
Py-daniel, Lúcia Rapp
Hrbek, Tomas
author2Str Bifi, Alessandro Gasparetto
Oliveira, Renildo Ribeiro de
Ribeiro, Emanuell Duarte
Lujan, Nathan K.
Py-daniel, Lúcia Rapp
Hrbek, Tomas
title Biogeography and species delimitation of the rheophilic suckermouth catfish genus Pseudolithoxus (Siluriformes: Loricariidae), with the description of a new species from the Brazilian Amazon
title_short Biogeography and species delimitation of the rheophilic suckermouth catfish genus Pseudolithoxus (Siluriformes: Loricariidae), with the description of a new species from the Brazilian Amazon
title_full Biogeography and species delimitation of the rheophilic suckermouth catfish genus Pseudolithoxus (Siluriformes: Loricariidae), with the description of a new species from the Brazilian Amazon
title_fullStr Biogeography and species delimitation of the rheophilic suckermouth catfish genus Pseudolithoxus (Siluriformes: Loricariidae), with the description of a new species from the Brazilian Amazon
title_full_unstemmed Biogeography and species delimitation of the rheophilic suckermouth catfish genus Pseudolithoxus (Siluriformes: Loricariidae), with the description of a new species from the Brazilian Amazon
title_sort biogeography and species delimitation of the rheophilic suckermouth catfish genus pseudolithoxus (siluriformes: loricariidae), with the description of a new species from the brazilian amazon
publisher Systematics and Biodiversity
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/16878
_version_ 1787143926775283712
score 11.755432

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