{"id":2476,"date":"2026-08-03T16:19:40","date_gmt":"2026-08-03T19:19:40","guid":{"rendered":"https:\/\/lillo.org.ar\/uel\/?page_id=2476"},"modified":"2026-08-03T16:25:25","modified_gmt":"2026-08-03T19:25:25","slug":"a-new-species-of-characidium-characiformes-crenuchidae-from-the-northwestern-la-plata-basin-in-argentina","status":"publish","type":"page","link":"https:\/\/lillo.org.ar\/uel\/a-new-species-of-characidium-characiformes-crenuchidae-from-the-northwestern-la-plata-basin-in-argentina\/","title":{"rendered":"A new species of <i>Characidium<\/i> (Characiformes: Crenuchidae) from the Northwestern La Plata Basin in Argentina"},"content":{"rendered":"<p>Using an integrative approach that combines molecular and morphological analyses, we describe\u00a0<em>Characidium lilloi<\/em>, a new species from the Andean portion of the northwestern La Plata basin, specifically from the upper Bermejo and Juramento River basins in Argentina. Specimens were examined for morphometric, meristic, and osteological traits. Genetic analyses based on\u00a0COI\u00a0and\u00a0CYTB\u00a0sequences were conducted to infer its phylogenetic relationships. The new species is distinguished by a unique combination of morphological characters including an unscaled isthmus, absence of dark stripes or spots on fins, 7\u201313 regular transversal bars, 14 scales around the caudal peduncle, 35\u201337 scales in longitudinal series, and highly developed nasal flaps; and molecular evidence.\u00a0<em>Characidium lilloi<\/em>, new species, was found to be closely related to\u00a0<em>C<\/em>. <em>fasciatum\u00a0<\/em>and\u00a0<em>C<\/em>. <em>gomesi\u00a0<\/em>and represents the first known member of the C2 Clade in the northwestern La Plata basin. Ecologically,\u00a0<em>C<\/em>. <em>lilloi<\/em>, new species, inhabits fast-flowing mountain rivers within the Yungas and Chacoan. This discovery underscores the northwestern La Plata basin as a biogeographic hotspot of endemism and reinforces its importance as a high-priority area for freshwater conservation.<\/p>\n<p>Ter\u00e1n, G.E., M\u00e9ttola, V.E., Alonso, F., Montes, M.M., M\u00e9ndez-L\u00f3pez, A., Miranda, G., Aguilera, G. and Mirande, J.M. 2026. A New Species of <em>Characidium<\/em> (Characiformes: Crenuchidae) from the Northwestern La Plata Basin in Argentina. <em>Ichthyology &amp; Herpetology<\/em> 114 (2).<\/p>\n<table class= 'bibliplug-authors'><tr><td><a href='https:\/\/lillo.org.ar\/uel\/author\/gaston-aguilera\/'><img alt='Gast\u00f3n Aguilera' src='http:\/\/lillo.org.ar\/uel\/wp-content\/uploads\/gaston-aguilera_avatar_1502218652-120x120.jpg' class='avatar avatar-120 photo' height='120' width='120' \/><\/a><\/td><td><strong><a href='https:\/\/lillo.org.ar\/uel\/author\/gaston-aguilera\/'>Gast\u00f3n Aguilera<\/strong><\/a><br\/>Investigador Adjunto\r<br\/>CONICET\r<br\/>Ictiolog\u00eda<\/td><tr><\/table>\n<table class= 'bibliplug-authors'><tr><td><a href='https:\/\/lillo.org.ar\/uel\/author\/marcos-mirande\/'><img alt='Juan Marcos Mirande' src='http:\/\/lillo.org.ar\/uel\/wp-content\/uploads\/juan-marcos-mirande_avatar_1502294074-120x120.jpg' class='avatar avatar-120 photo' height='120' width='120' \/><\/a><\/td><td><strong><a href='https:\/\/lillo.org.ar\/uel\/author\/marcos-mirande\/'>Juan Marcos Mirande<\/strong><\/a><br\/>Investigador Principal\r<br\/>CONICET\r<br\/>FML\r<br\/>Ictiolog\u00eda<\/td><tr><\/table>\n<table class= 'bibliplug-authors'><tr><td><a href='https:\/\/lillo.org.ar\/uel\/author\/guillermo-teran\/'><img alt='Guillermo Ter\u00e1n' src='http:\/\/lillo.org.ar\/uel\/wp-content\/uploads\/guillermo-teran_avatar_1502204093-120x120.jpg' class='avatar avatar-120 photo' height='120' width='120' \/><\/a><\/td><td><strong><a href='https:\/\/lillo.org.ar\/uel\/author\/guillermo-teran\/'>Guillermo Ter\u00e1n<\/strong><\/a><br\/>Investigador Adjunto\r<br\/>CONICET\r<br\/>FML\r<br\/>Ictiolog\u00eda\r<br\/><\/td><tr><\/table>\n","protected":false},"excerpt":{"rendered":"<p>Using an integrative approach that combines molecular and morphological analyses, we describe\u00a0Characidium lilloi, a new species from the Andean portion of the northwestern La Plata basin, specifically from the upper Bermejo and Juramento River basins in Argentina. Specimens were examined for morphometric, meristic, and osteological traits. Genetic analyses based on\u00a0COI\u00a0and\u00a0CYTB\u00a0sequences were conducted to infer its [&hellip;]<\/p>\n","protected":false},"author":57,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/lillo.org.ar\/uel\/wp-json\/wp\/v2\/pages\/2476"}],"collection":[{"href":"https:\/\/lillo.org.ar\/uel\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/lillo.org.ar\/uel\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/lillo.org.ar\/uel\/wp-json\/wp\/v2\/users\/57"}],"replies":[{"embeddable":true,"href":"https:\/\/lillo.org.ar\/uel\/wp-json\/wp\/v2\/comments?post=2476"}],"version-history":[{"count":3,"href":"https:\/\/lillo.org.ar\/uel\/wp-json\/wp\/v2\/pages\/2476\/revisions"}],"predecessor-version":[{"id":2484,"href":"https:\/\/lillo.org.ar\/uel\/wp-json\/wp\/v2\/pages\/2476\/revisions\/2484"}],"wp:attachment":[{"href":"https:\/\/lillo.org.ar\/uel\/wp-json\/wp\/v2\/media?parent=2476"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}