{"id":432,"date":"2017-03-31T01:46:51","date_gmt":"2017-03-31T04:46:51","guid":{"rendered":"https:\/\/www.ufrgs.br\/ictio\/?p=432"},"modified":"2017-03-31T01:46:51","modified_gmt":"2017-03-31T04:46:51","slug":"ontogenetic-changes-in-mouth-morphology-triggers-conflicting-hypotheses-of-relationships-in-characid-fishes-ostariophysi-characiformes","status":"publish","type":"post","link":"https:\/\/www.ufrgs.br\/ictio\/2017\/03\/31\/ontogenetic-changes-in-mouth-morphology-triggers-conflicting-hypotheses-of-relationships-in-characid-fishes-ostariophysi-characiformes\/","title":{"rendered":"Ontogenetic changes in mouth morphology triggers conflicting hypotheses of relationships in characid fishes (Ostariophysi: Characiformes)"},"content":{"rendered":"<p>Hirschmann\u00a0Alice<a href=\"https:\/\/www.researchgate.net\/profile\/Alice_Hirschmann\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-160 size-full\" src=\"https:\/\/www.ufrgs.br\/ictio\/wp-content\/uploads\/2015\/10\/researchgate-logo2.gif\" alt=\"researchgate logo\" width=\"19\" height=\"19\" \/><\/a>; Fagundes Nelson J. R.; Malabarba, Luiz R<a href=\"https:\/\/www.researchgate.net\/profile\/Luiz_Malabarba\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-160\" src=\"https:\/\/www.ufrgs.br\/ictio\/wp-content\/uploads\/2015\/10\/researchgate-logo2.gif\" alt=\"researchgate logo\" width=\"19\" height=\"19\" \/><\/a>.<\/p>\n<p><em>Bryconamericus lethostigmus<\/em> is the type-species of the monotypic genus <em>Odontostoechus<\/em>, diagnosed in part based on the presence of a unique tooth series in the premaxilla<em>.<\/em> Recently a new proposal of classification of the Stevardiinae placed <em>Odontostoechus<\/em> as a junior synonym of a monophyletic genus <em>Bryconamericus<\/em> <em>sensu stricto<\/em>, a genus characterized by the presence of two tooth series. <em>Bryconamericus lethostigmus<\/em> is redescribed herein and the single tooth series in the premaxilla is demonstrated to originate from merging of the external tooth row with the inner row during ontogeny refuting primary hypothesis of homology between the mouth morphology of <em>B. lethostigmus<\/em> and the genera <em>Bryconacidnus<\/em>, <em>Ceratobranchia<\/em>, <em>Monotocheirodon<\/em>, <em>Othonocheirodus<\/em>, <em>Rhinopetitia<\/em> and <em>Rhinobrycon<\/em>. A phylogeographic analysis indicated that the pattern described for the sympatric species <em>Diapoma itaimbe<\/em> is not mirrored by <em>B<\/em>. <em>lethostigmus<\/em>. The results also do not support the hypothesis of a new species in the rio Ararangu\u00e1 drainage.<\/p>\n<p>Artigo:\u00a0http:\/\/www.scielo.br\/scielo.php?script=sci_arttext&amp;pid=S1679-62252017000100212&amp;lng=en&amp;nrm=iso&amp;tlng=en<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.scielo.br\/img\/revistas\/ni\/v15n1\/\/1982-0224-ni-15-01-e160073-gf2.jpg\" \/><\/p>\n<p><span class=\"label\">Fig. 2\u00a0<\/span><span class=\"caption\"><em>Bryconamericus lethostigmus<\/em>. a. holotype, 48.68 mm SL (UMMZ 143272); b. color in life in a fresh collected specimen, rio Tr\u00eas Forquilhas basin, Itati, Rio Grande do Sul, Brazil, UFRGS 16500.\u00a0<\/span><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.scielo.br\/img\/revistas\/ni\/v15n1\/\/1982-0224-ni-15-01-e160073-gf3.jpg\" \/><\/p>\n<p><span class=\"label\">Fig. 3\u00a0<\/span><span class=\"caption\"><em>Bryconamericus lethostigmus<\/em>. a. detail of the mouth of a small specimen, with teeth covered by the lips (UFRGS 16083, 24.5 mm SL); b. detail of the mouth of a large specimen with upper lip atrophied and showing the premaxillary teeth (UFRGS 20660, 54.3 mm SL).\u00a0<\/span><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.scielo.br\/img\/revistas\/ni\/v15n1\/\/1982-0224-ni-15-01-e160073-gf5.jpg\" \/><\/p>\n<p><span class=\"label\">Fig. 5\u00a0<\/span><span class=\"caption\">Ontogenetic changes in the number of tooth rows of the premaxilla, number of teeth in the maxilla and shape of these bones in <em>Bryconamericus lethostigmus<\/em>. a. 24.1 mm SL (UFRGS 19488); b. 50.4 mm SL (MCP10774); c. 60.9 mm SL (MCP 19173).\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hirschmann\u00a0Alice; Fagundes Nelson J. R.; Malabarba, Luiz R. Bryconamericus lethostigmus is the type-species of the monotypic genus Odontostoechus, diagnosed in part based on the presence of a unique tooth series in the premaxilla. Recently a new proposal of classification of the Stevardiinae placed Odontostoechus as a junior synonym of a monophyletic genus Bryconamericus sensu stricto, [&hellip;]<\/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-432","post","type-post","status-publish","format-standard","hentry","category-sem-categoria"],"_links":{"self":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts\/432","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/comments?post=432"}],"version-history":[{"count":1,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts\/432\/revisions"}],"predecessor-version":[{"id":434,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts\/432\/revisions\/434"}],"wp:attachment":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/media?parent=432"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/categories?post=432"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/tags?post=432"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}