{"id":2014,"date":"2025-08-27T18:03:17","date_gmt":"2025-08-27T21:03:17","guid":{"rendered":"https:\/\/lillo.org.ar\/uel\/?page_id=2014"},"modified":"2025-08-27T18:09:34","modified_gmt":"2025-08-27T21:09:34","slug":"a-carcharodontosaurid-tooth-from-boca-de-forno-ravine-of-the-itapecuru-formation-parnaiba-basin-maranhao-brazil","status":"publish","type":"page","link":"https:\/\/lillo.org.ar\/uel\/a-carcharodontosaurid-tooth-from-boca-de-forno-ravine-of-the-itapecuru-formation-parnaiba-basin-maranhao-brazil\/","title":{"rendered":"A carcharodontosaurid tooth from \u201cBoca de Forno\u201d Ravine of the Itapecuru Formation, Parna\u00edba Basin, Maranh\u00e3o, Brazil"},"content":{"rendered":"

Carcharodontosauridae forma un clado de ter\u00f3podos alosauroideos de tama\u00f1o medio a muy grande (6-14 m de longitud) restringidos principalmente al Cret\u00e1cico Temprano y Medio con una distribuci\u00f3n casi mundial, y caracterizados por cr\u00e1neos ornamentados profundos y estrechos y dientes ziphodont fuertemente comprimidos. En Brasil, el registro f\u00f3sil de carcarodontos\u00e1uridos se limita a dientes desprendidos y elementos postcraneales aislados de los dep\u00f3sitos del Aptiano-Cenomaniense de la parte oriental del pa\u00eds. Aqu\u00ed describimos e identificamos un diente desprendido de un afloramiento poco conocido de la Formaci\u00f3n Itapecuru del Cret\u00e1cico Temprano (Aptiano-Albiano) del Estado de Maranh\u00e3o, noreste de Brasil. Aunque ya se han descrito algunos dientes de los dep\u00f3sitos aptiano-albianos de esta unidad, este esp\u00e9cimen representa el primer material dental aislado de la cuenca del Parna\u00edba que puede asignarse con seguridad a un carcarodontos\u00e1urido mediante t\u00e9cnicas clad\u00edsticas y morfom\u00e9tricas, pero tambi\u00e9n bas\u00e1ndose en un estudio sistem\u00e1tico. Los resultados del estudio aqu\u00ed realizado sugieren que el esp\u00e9cimen pertenece a un carcarodontosaurino estrechamente relacionado con los taxones patag\u00f3nicos Giganotosaurus<\/em> y Mapusaurus<\/em>, que son m\u00e1s j\u00f3venes en edad. Aunque el esp\u00e9cimen est\u00e1 estrechamente relacionado con los taxones patag\u00f3nicos mencionados, la composici\u00f3n faun\u00edstica de la cuenca del Parna\u00edba parece ser m\u00e1s similar a la del norte de \u00c1frica. No obstante, son necesarios nuevos esfuerzos de recolecci\u00f3n en estas localidades para encontrar restos esquel\u00e9ticos de carcarodontos\u00e1uridos y ampliar la base comparativa para la identificaci\u00f3n de los carcarodontos\u00e1uridos.<\/p>\n

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Specimen CPHNAMA VT-1502, a shed tooth crown referred to Carcharodontosaurinae indet. in (A) mesial, (B) labial, (C) distal, (D) lingual, (E) apical, and (F) basal views. Abbreviations: dca, distal carina; ids, interdenticular sulcus; mca, mesial carina. Scale bar \u00bc 1 cm.<\/figcaption><\/figure>\n

Carcharodontosauridae forms a clade of medium-to very large-sized (6\u201314 m long) allosauroid theropods mostly restricted to the Early and mid-Cretaceous with an almost global distribution, and characterized by deep and narrow ornamented skulls and strongly compressed ziphodont teeth. In Brazil, the carcharodontosaurid fossil record is limited to shed teeth and isolated postcranial elements from the Aptian-Cenomanian deposits of the eastern part of the country. Here we describe and identify a shed tooth from a little-known outcrop of the\u00a0Early Cretaceous\u00a0(Aptian-Albian) Itapecuru Formation of the Maranh\u00e3o State, northeastern Brazil. Although some teeth have already been reported from the Aptian-Albian deposits of this unit, this specimen represents the first isolated dental material from the Parna\u00edba Basin that can be confidently assigned to a carcharodontosaurid through cladistic and morphometric techniques, but also based on a systematic study. The results of the herein conducted study suggest that the specimen belongs to a carcharodontosaurine closely related to the Patagonian taxa\u00a0Giganotosaurus<\/em>\u00a0and\u00a0Mapusaurus<\/em>, which are younger in age. Although the specimen is closely related to the abovementioned Patagonian taxa, the faunal composition of the Parna\u00edba Basin seems to be more similar to that of\u00a0North Africa. Nevertheless, further collecting efforts are needed in these localities to find skeletal carcharodontosaurid remains and to broaden the comparative base for the identification of theropod dentition.<\/p>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Carcharodontosauridae forma un clado de ter\u00f3podos alosauroideos de tama\u00f1o medio a muy grande (6-14 m de longitud) restringidos principalmente al Cret\u00e1cico Temprano y Medio con una distribuci\u00f3n casi mundial, y caracterizados por cr\u00e1neos ornamentados profundos y estrechos y dientes ziphodont fuertemente comprimidos. En Brasil, el registro f\u00f3sil de carcarodontos\u00e1uridos se limita a dientes desprendidos y […]<\/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\/2014"}],"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=2014"}],"version-history":[{"count":3,"href":"https:\/\/lillo.org.ar\/uel\/wp-json\/wp\/v2\/pages\/2014\/revisions"}],"predecessor-version":[{"id":2018,"href":"https:\/\/lillo.org.ar\/uel\/wp-json\/wp\/v2\/pages\/2014\/revisions\/2018"}],"wp:attachment":[{"href":"https:\/\/lillo.org.ar\/uel\/wp-json\/wp\/v2\/media?parent=2014"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

Christophe Hendrickx<\/a><\/td>Christophe Hendrickx<\/strong><\/a>Becario postdoctoral\rCONICET\rPaleontolog\u00eda<\/td>