{"id":410,"date":"2017-03-12T19:51:13","date_gmt":"2017-03-12T22:51:13","guid":{"rendered":"https:\/\/www.ufrgs.br\/ictio\/?p=410"},"modified":"2017-03-12T19:51:13","modified_gmt":"2017-03-12T22:51:13","slug":"description-of-a-new-blind-and-rare-species-of-xyliphius-siluriformes-aspredinidae-from-the-amazon-basin-using-high-resolution-computed-tomography","status":"publish","type":"post","link":"https:\/\/www.ufrgs.br\/ictio\/2017\/03\/12\/description-of-a-new-blind-and-rare-species-of-xyliphius-siluriformes-aspredinidae-from-the-amazon-basin-using-high-resolution-computed-tomography\/","title":{"rendered":"Description of a New Blind and Rare Species of Xyliphius (Siluriformes: Aspredinidae) from the Amazon Basin Using High-Resolution Computed Tomography"},"content":{"rendered":"<p>Tiago P. Carvalho<a href=\"https:\/\/www.researchgate.net\/profile\/Tiago_Carvalho19\" 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>,\u00a0Roberto E. Reis and Mark H. Sabaj<\/p>\n<p><i>Xyliphius sofiae,<\/i> new species, is described based on a unique specimen exhibiting four autapomorphies: eyes absent vs. present (though reduced); color pale, lacking pigment vs. head and body darkly pigmented; branchiostegal rays five vs. four; and unculiferous tubercles on posterior body distributed evenly vs. enlarged unculiferous tubercles typically arranged in five distinct rows above pelvic-fin base to posterior end of caudal peduncle. In addition, the pectoral fin of <i>X. sofiae,<\/i> new species, has one ossified proximal radial vs. two in congeners (except <i>X. magdalenae<\/i>, not examined). <i>Xyliphius sofiae,<\/i> new species, differs from all congeners except <i>X. lepturus<\/i> by snout tip elongated and narrowly rounded vs. short and broadly rounded, often with small median notch; fifth ceratobranchial relatively narrow with elongate acicular teeth vs. broadly expanded, leaf-shaped, with shorter and broader, conical teeth; anterior limits of branchial apertures separated by distance less than length of aperture vs. greater than length of aperture; anal-fin rays modally nine vs. seven; and lateral line extending onto base of caudal-fin rays vs. finishing in hypural region. Based on the single specimen collected in the main channel of the R\u00edo Amazonas near Iquitos, Peru, we describe the osteology of <i>X. sofiae,<\/i> new species, using a non-invasive technique: high-resolution X-ray computed tomography (HRXCT). We consider <i>Xyliphius lombarderoi<\/i> Risso and Risso, 1964, a species based on a unique holotype that is now lost, to be a subjective junior synonym of <i>X. barbatus<\/i> Alonso de Ar\u00e1mburu and Ar\u00e1mburu, 1962. Variable characteristics are summarized for the seven species of <i>Xyliphius<\/i> treated here as valid, and their distributions are plotted based on a comprehensive review of museum specimens.<\/p>\n<p>Article:\u00a0<a href=\"http:\/\/www.asihcopeiaonline.org\/doi\/abs\/10.1643\/CI-16-456\">http:\/\/www.asihcopeiaonline.org\/doi\/abs\/10.1643\/CI-16-456<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/scontent.fpoa4-1.fna.fbcdn.net\/v\/t31.0-8\/17239775_1459561127398013_7966842118156548302_o.jpg?oh=ed6c27d103e1c4ea8ef5ecd278d6a4bb&amp;oe=5973569B\" alt=\"No hay texto alternativo autom\u00e1tico disponible.\" width=\"700\" height=\"326\" \/><\/p>\n<p>Holotype of Xyliphius sofiae, ANSP 182322, 44.1 mm SL, Rio Amazonas in vicinity of Iquitos, Loreto, Peru. (A\u2013C) Alcohol preserved (scale bar =5 mm). (D) Live. Photos by M. Sabaj.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tiago P. Carvalho,\u00a0Roberto E. Reis and Mark H. Sabaj Xyliphius sofiae, new species, is described based on a unique specimen exhibiting four autapomorphies: eyes absent vs. present (though reduced); color pale, lacking pigment vs. head and body darkly pigmented; branchiostegal rays five vs. four; and unculiferous tubercles on posterior body distributed evenly vs. enlarged unculiferous [&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-410","post","type-post","status-publish","format-standard","hentry","category-sem-categoria"],"_links":{"self":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts\/410","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=410"}],"version-history":[{"count":1,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts\/410\/revisions"}],"predecessor-version":[{"id":411,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts\/410\/revisions\/411"}],"wp:attachment":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/media?parent=410"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/categories?post=410"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/tags?post=410"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}