The northernmost record of Catagonus stenocephalus (Lund in Reinhardt, 1880) (Mammalia, Cetartiodactyla) and its palaeoenvironmental and palaeobiogeographical significance

Autor: Rafael Carvalho da Silva, Federico Bonissoni Pêgo, Leonardo dos Santos Avilla, Lisiane Müller, Oswaldo Baffa, Ana Maria Graciano Figueiredo, Germán Mariano Gasparini, Angela Kinoshita, Bruno Araujo Absolon, Leopoldo Héctor Soibelzon
Rok vydání: 2013
Předmět:
Zdroj: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
ISSN: 0895-9811
Popis: During fieldwork carried out in January 2009 at Aurora do Tocantins (Tocantins State, northern Brazil), we recovered a fragmentary right maxilla (UNIRIO-PM 1006) of Catagonus stenocephalus from a sedimentary deposit of presumed late Pleistocene age in a karstic cave. This paper aims to: (1) provide the first record of C. stenocephalus in the northern region of Brazil (and consequently, also the northernmost one); (2) update the geographic distribution of C. stenocephalus; (3) present a date for the specimen; and (4) discuss the palaeoenvironmental and palaeobiogeographical implications of the finding. The species C. stenocephalus (Lund) is known from the Bonaerian (middle Pleistocene) and Lujanian (late Pleistocene to earliest Holocene) ages in Argentina, Uruguay, Brazil and Bolivia. The new record presented here extends the geographical distribution of C. stenocephalus more than 1000 km north from the former northernmost record (caves of Lagoa Santa region). Peccaries of the genus Catagonus have several morphological features associated with cursorial habits in relatively open and dry environments. The new distributional range of C. stenocephalus is coincident with the Chacoan subregion, characterized by dry climates and open areas. As the studied material comes from the top of the carbonate layer, this may suggest that the deposition of the C. stenocephalus remains described here is synchronous with the onset of a wetter climate phase. This argument is also in accordance with the datation results, around 20 ky BP, just after the last glacial maximum. This increasingly wet climate, which may also be related to the climatic changes that occurred during the late Pleistocene/early Holocene, could be a factor in the extinction of C. stenocephalus in South America. Fil: Avilla, Leonardo S.. Universidade Federal do Rio de Janeiro; Brasil Fil: Müller, Lisiana. Universidade Federal do Rio de Janeiro; Brasil Fil: Gasparini, Germán Mariano. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Soibelzon, Leopoldo Héctor. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina Fil: Absolon, Bruno. Universidade Federal do Rio de Janeiro; Brasil Fil: Pêgo, Frederico Bonissoni. Universidade Federal do Rio de Janeiro; Brasil Fil: Silva, Rafael C.. Companhia de Pesquisa de Recursos Minerais; Brasil Fil: Kinoshita, Angela. Universidade do Sagrado Coração; Brasil. Universidade do Sao Paulo. Facultad de Filosofía, Letras e Ciencias Humanas; Brasil Fil: Graciano Figueredo, Ana María. Comissao Nacional de Energia Nuclear.; Brasil Fil: Baffa, Oswaldo. Universidade do Sao Paulo. Facultad de Filosofía, Letras e Ciencias Humanas; Brasil
Databáze: OpenAIRE
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