{"id":1049,"date":"2020-11-09T18:17:56","date_gmt":"2020-11-09T21:17:56","guid":{"rendered":"https:\/\/www.ufrgs.br\/ictio\/?p=1049"},"modified":"2020-11-09T18:17:56","modified_gmt":"2020-11-09T21:17:56","slug":"hidden-or-unnoticed-multiple-lines-of-evidence-support-the-recognition-of-a-new-species-of-pseudocorynopoma-characidae-corynopomini","status":"publish","type":"post","link":"https:\/\/www.ufrgs.br\/ictio\/en\/2020\/11\/09\/hidden-or-unnoticed-multiple-lines-of-evidence-support-the-recognition-of-a-new-species-of-pseudocorynopoma-characidae-corynopomini\/","title":{"rendered":"Hidden or unnoticed? Multiple lines of evidence support the recognition of a new species of Pseudocorynopoma (Characidae: Corynopomini)"},"content":{"rendered":"

<\/p>\n

Luiz R. Malabarba,\u00a0Junior Chuctaya,\u00a0Alice Hirschmann,\u00a0Eduardo Bitencourt de Oliveira,\u00a0Andr\u00e9a T. Thomaz<\/strong><\/p>\n

Abstract<\/h3>\n
\n

Species delimitation is a permanent issue in systematics. The increasing recognition of geographically isolated populations as independent lineages allowed by new methods of analysis has inflated the species\u2010populations dilemma, which involves deciding whether to consider separate lineages as different species or structured genetic populations. This is commonly observed between fishes of adjacent river basins, with some lineages being considered allopatric sister species and others considered isolated populations or variants of the same species.\u00a0Pseudocorynopoma doriae<\/i>\u00a0is a characid diagnosed from its single congener by the number of anal\u2010fin rays and sexually dimorphic characters of males, including distinct fin colouration. The authors found variation in the colour pattern between isolated populations previously identified as\u00a0P. doriae<\/i>\u00a0but no variation in scale or fin\u2010ray counts. They analysed molecular evidence at the population level and morphological differences related to life history (e.g.<\/i>, colour dimorphism related to inseminating behaviour). The results provide compelling evidence for the recognition of a new species of\u00a0Pseudocorynopoma<\/i>\u00a0despite the lack of discrete differences in meristic data. The recognition of the new species is consistent with biogeographical evidence for the long\u2010term isolation of the respective river drainages and with differences between the ichthyofaunal communities of these rivers.<\/p>\n

link:\u00a0https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/jfb.14572<\/a><\/p>\n

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FIGURE 2 Live specimens of Pseudocorynopoma, showing the colour pattern and shape of fins in a (a) mature male [UFRGS 22249, 53.6 mm\u00a0standard length (SL)], (b) immature male (UFRGS 22249, 48.5 mm SL) and (c) mature female (UFRGS 22249, 50.5 mm SL) of Pseudocorynopoma\u00a0doriae from the rio Uruguay\/rio Negro drainages and of a (d) mature male (UFRGS 22112, 52.5 mm SL), (e) immature male (UFRGS 22112,\u00a048.0 mm SL) and (f) mature female (UFRGS 22112, 52.1 mm SL) of Pseudocorynopoma stanleyi from the laguna dos Patos drainage. All specimens\u00a0represented in scale<\/p><\/div>\n

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FIGURE 7 Pseudocorynopoma stanleyi, holotype. UFRGS 27600,\u00a060.96 mm standard length, male. Brazil, Rio Grande do Sul, Marques\u00a0de Souza; arroio Tamandu\u00e1<\/p><\/div>\n

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FIGURE 5 Haplotypic network\u00a0for the populations in\u00a0Pseudocorynopoma doriae inferred\u00a0based on mtDNA demonstrating the\u00a0strong genetic structure observed\u00a0between the two putative species\u00a0(depicted as cold and warm colours).\u00a0Each coloured circle indicates a\u00a0haplotype, with colours indicating\u00a0the population and size the\u00a0frequency. Black line ticks indicate\u00a0the number of mutational steps, and\u00a0black circles indicate the missing or\u00a0unsampled steps<\/p><\/div>\n<\/div>\n

<\/p>","protected":false},"excerpt":{"rendered":"

Luiz R. Malabarba,\u00a0Junior Chuctaya,\u00a0Alice Hirschmann,\u00a0Eduardo Bitencourt de Oliveira,\u00a0Andr\u00e9a T. Thomaz Abstract Species delimitation is a permanent issue in systematics. The increasing recognition of geographically isolated populations as independent lineages allowed by new methods of analysis has inflated the species\u2010populations dilemma, which involves deciding whether to consider separate lineages as different species or structured genetic populations. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1049","post","type-post","status-publish","format-standard","hentry","category-sem-categoria"],"_links":{"self":[{"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/posts\/1049","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/comments?post=1049"}],"version-history":[{"count":1,"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/posts\/1049\/revisions"}],"predecessor-version":[{"id":1053,"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/posts\/1049\/revisions\/1053"}],"wp:attachment":[{"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/media?parent=1049"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/categories?post=1049"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/tags?post=1049"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}