Artigo

The systematic and biogeographical status of Fredius reflexifrons (Ortmann, 1897) and Fredius fittkaui (Bott, 1967) (Crustacea: Brachyura: Pseudothelphusidae) from the Amazon and Atlantic Guianas River basins

There is considerable confusion in the literature regarding the systematic position and distribution of two pseudothelphusid crabs originally described as Potamocarcinus reflexifrons Ortmann, 1897 and Potamocarcinus reflexifrons fittkaui Bott, 1967, and now included in the genus Fredius Pretzman, 19...

ver descrição completa

Autor principal: Magalhães, Célio
Outros Autores: Rodríguez, Gilberto
Grau: Artigo
Idioma: English
Publicado em: Acta Amazonica 2020
Assuntos:
Pseudothelphusidae
Fredius
Freshwater Crabs
Amazon
Biogeography
Pseudothelphusidae
Fredius
Caranguejos Dulcícolas
Amazônia
Biogeografia
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/13534
id oai:repositorio:1-13534
recordtype dspace
spelling oai:repositorio:1-13534 The systematic and biogeographical status of Fredius reflexifrons (Ortmann, 1897) and Fredius fittkaui (Bott, 1967) (Crustacea: Brachyura: Pseudothelphusidae) from the Amazon and Atlantic Guianas River basins Situação sistemática e biogeográfica de Fredius reflexifrons (Ortmann, 1897) e Fredius fittkaui (Bott, 1967) (Crustacea: Brachyura: Pseudothelphusidae) das bacias do rio Amazonas e dos rios costeiros das Guianas Magalhães, Célio Rodríguez, Gilberto Pseudothelphusidae Fredius Freshwater Crabs Amazon Biogeography Pseudothelphusidae Fredius Caranguejos Dulcícolas Amazônia Biogeografia There is considerable confusion in the literature regarding the systematic position and distribution of two pseudothelphusid crabs originally described as Potamocarcinus reflexifrons Ortmann, 1897 and Potamocarcinus reflexifrons fittkaui Bott, 1967, and now included in the genus Fredius Pretzman, 1965, as F. reflexifrons and F. fittkaui. Study of numerous specimens from recent collections, together with a critical analysis of the data published in the literature, shows that both taxa could be easily separated by gonopodal characters. The two species occupy discrete areas of distribution along the main axis of the Amazon River and in the upper Rio Negro Basin, respectively, with an overlap in the Atlantic Guianas. It is postulated that they originated from a common ancestor, through a process of vicariance, in the two areas observed at present. Permeability of barriers allowed their further occupancy of the Atlantic Guianas after the marine regressions in this area. Há uma considerável confusão na literatura a respeito da posição sistemática e distribuição de duas espécies de caranguejos pseudotelfusídeos originalmente descritos como Potamocarcinus reflexifrons Ortmann, 1897 e Potamocarcinus reflexifrons fittkaui Bott, 1967, atualmente incluídos no gênero Fredius Pretzmann, 1965 como F. reflexifrons e F. fittkaui. O estudo de numerosos espécimes obtidos em coletas recentes, complementado por uma análise crítica dos dados publicados na literatura, mostra que ambos os taxa podem ser facilmente separados por caracteres do gonópodo. As duas espécies ocupam áreas de distribuição distintas ao longo do eixo principal do rio Amazonas e no alto rio Negro, respectivamente, com uma sobreposição na região das Guianas. Postula-se que essas espécies se originaram de um ancestral comum, por meio de um processo de vicariância, nas duas áreas observadas atualmente. A permeabilidade das barreiras permitiu uma posterior distribuição na região das Guianas após as regressões marinhas ocorridas naquela área. 2020-04-24T15:29:11Z 2020-04-24T15:29:11Z 2002 Artigo https://repositorio.inpa.gov.br/handle/1/13534 1809-43922002324689 en Volume 32, Número 4, Pags. 677-677 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Acta Amazonica
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Pseudothelphusidae
Fredius
Freshwater Crabs
Amazon
Biogeography
Pseudothelphusidae
Fredius
Caranguejos Dulcícolas
Amazônia
Biogeografia
spellingShingle Pseudothelphusidae
Fredius
Freshwater Crabs
Amazon
Biogeography
Pseudothelphusidae
Fredius
Caranguejos Dulcícolas
Amazônia
Biogeografia
Magalhães, Célio
The systematic and biogeographical status of Fredius reflexifrons (Ortmann, 1897) and Fredius fittkaui (Bott, 1967) (Crustacea: Brachyura: Pseudothelphusidae) from the Amazon and Atlantic Guianas River basins
topic_facet Pseudothelphusidae
Fredius
Freshwater Crabs
Amazon
Biogeography
Pseudothelphusidae
Fredius
Caranguejos Dulcícolas
Amazônia
Biogeografia
description There is considerable confusion in the literature regarding the systematic position and distribution of two pseudothelphusid crabs originally described as Potamocarcinus reflexifrons Ortmann, 1897 and Potamocarcinus reflexifrons fittkaui Bott, 1967, and now included in the genus Fredius Pretzman, 1965, as F. reflexifrons and F. fittkaui. Study of numerous specimens from recent collections, together with a critical analysis of the data published in the literature, shows that both taxa could be easily separated by gonopodal characters. The two species occupy discrete areas of distribution along the main axis of the Amazon River and in the upper Rio Negro Basin, respectively, with an overlap in the Atlantic Guianas. It is postulated that they originated from a common ancestor, through a process of vicariance, in the two areas observed at present. Permeability of barriers allowed their further occupancy of the Atlantic Guianas after the marine regressions in this area.
format Artigo
author Magalhães, Célio
author2 Rodríguez, Gilberto
author2Str Rodríguez, Gilberto
title The systematic and biogeographical status of Fredius reflexifrons (Ortmann, 1897) and Fredius fittkaui (Bott, 1967) (Crustacea: Brachyura: Pseudothelphusidae) from the Amazon and Atlantic Guianas River basins
title_short The systematic and biogeographical status of Fredius reflexifrons (Ortmann, 1897) and Fredius fittkaui (Bott, 1967) (Crustacea: Brachyura: Pseudothelphusidae) from the Amazon and Atlantic Guianas River basins
title_full The systematic and biogeographical status of Fredius reflexifrons (Ortmann, 1897) and Fredius fittkaui (Bott, 1967) (Crustacea: Brachyura: Pseudothelphusidae) from the Amazon and Atlantic Guianas River basins
title_fullStr The systematic and biogeographical status of Fredius reflexifrons (Ortmann, 1897) and Fredius fittkaui (Bott, 1967) (Crustacea: Brachyura: Pseudothelphusidae) from the Amazon and Atlantic Guianas River basins
title_full_unstemmed The systematic and biogeographical status of Fredius reflexifrons (Ortmann, 1897) and Fredius fittkaui (Bott, 1967) (Crustacea: Brachyura: Pseudothelphusidae) from the Amazon and Atlantic Guianas River basins
title_sort systematic and biogeographical status of fredius reflexifrons (ortmann, 1897) and fredius fittkaui (bott, 1967) (crustacea: brachyura: pseudothelphusidae) from the amazon and atlantic guianas river basins
publisher Acta Amazonica
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/13534
_version_ 1787143894435102720
score 11.755432

Registros relacionados