{"id":948,"date":"2020-06-13T05:25:58","date_gmt":"2020-06-13T08:25:58","guid":{"rendered":"https:\/\/www.ufrgs.br\/ictio\/?p=948"},"modified":"2020-06-13T05:25:58","modified_gmt":"2020-06-13T08:25:58","slug":"systematic-revision-of-the-neotropical-catfish-genus-scleronema-siluriformes-trichomycteridae-with-descriptions-of-six-new-species-from-pampa-grasslands","status":"publish","type":"post","link":"https:\/\/www.ufrgs.br\/ictio\/en\/2020\/06\/13\/systematic-revision-of-the-neotropical-catfish-genus-scleronema-siluriformes-trichomycteridae-with-descriptions-of-six-new-species-from-pampa-grasslands\/","title":{"rendered":"Systematic revision of the Neotropical catfish genus Scleronema (Siluriformes: Trichomycteridae), with descriptions of six new species from Pampa grasslands"},"content":{"rendered":"

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Juliano\u00a0Ferrer and\u00a0<\/span>Luiz R.\u00a0Malabarba<\/span><\/p>\n

ABSTRACT<\/strong><\/p>\n

The Neotropical genus\u00a0Scleronema<\/em>\u00a0is revised based on the re-examination of the type specimens and 1,713 newly collected specimens.\u00a0Scleronema<\/em>\u00a0is diagnosed from other trichomycterids by the following unambiguous derived characters: fleshy flap at the base of the maxillary barbell; skin flap in the posterior margin of the opercle; articulation between the autopalatine and the vomer ventrally located, with the medial margins of the autopalatines very close to each other; and autopalatine with an interrupted or not interrupted ossified arch-shaped process on its dorsal surface forming a canal.\u00a0Scleronema minutum<\/em>\u00a0and\u00a0S. operculatum<\/em>\u00a0are redescribed,\u00a0S. angustirostre<\/em>\u00a0is considered a junior synonym of\u00a0S. minutum<\/em>, and six new species are described. A lectotype is designated for\u00a0Trichomycterus minutus<\/em>. The type localities of\u00a0S. angustirostre<\/em>,\u00a0S. minutum<\/em>, and\u00a0S. operculatum<\/em>\u00a0are reviewed in order to correct erroneous information cited in articles and catalogs subsequent to the original descriptions. Species of\u00a0Scleronema<\/em>\u00a0are geographically distributed in the La Plata basin and Atlantic coastal drainages from Southern Brazil, Southern Paraguay, Northeastern Argentina and Uruguay. They inhabit rivers or streams with sand- or gravel-bottoms across the Pampa grasslands. We provide evidences to recognize two putative monophyletic units within the genus, namely the\u00a0S. minutum<\/em>\u00a0species group and the\u00a0S. operculatum<\/em>\u00a0species group, and discuss the distribution patterns of their species.<\/p>\n

Link:\u00a0https:\/\/www.scielo.br\/scielo.php?script=sci_arttext&pid=S1679-62252020000200202&lng=en&nrm=iso&tlng=en<\/a><\/p>\n

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Scleronema operculatum, holotype (FMNH 58080; 65.9 mm SL), Brazil, Rio Grande do Sul, Cacequi, rio Cacequi, tributary to rio Santa Maria, rio Ibicu\u00ed basin, lower rio Uruguay. Photograph taken by Sandra Raredon.<\/p><\/div>\n

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Geographical distribution of the genus Scleronema. Circles and squares indicate species of the S. minutum group and S. operculatum group, respectively. Some symbols represent more than one collection locality. AR = Argentina; BR = Brazil; PY = Paraguay; UY = Uruguay.<\/p><\/div><\/p>","protected":false},"excerpt":{"rendered":"

Juliano\u00a0Ferrer and\u00a0Luiz R.\u00a0Malabarba ABSTRACT The Neotropical genus\u00a0Scleronema\u00a0is revised based on the re-examination of the type specimens and 1,713 newly collected specimens.\u00a0Scleronema\u00a0is diagnosed from other trichomycterids by the following unambiguous derived characters: fleshy flap at the base of the maxillary barbell; skin flap in the posterior margin of the opercle; articulation between the autopalatine and the […]<\/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-948","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\/948","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=948"}],"version-history":[{"count":1,"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/posts\/948\/revisions"}],"predecessor-version":[{"id":952,"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/posts\/948\/revisions\/952"}],"wp:attachment":[{"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/media?parent=948"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/categories?post=948"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/en\/wp-json\/wp\/v2\/tags?post=948"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}