The northernmost record of catagonus stenocephalus (Lund in Reinhardt, 1880) palaeobiogeographical significance
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Journal of South American Earth Sciences
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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
argumentis also in accordancewith the datation results, around 20 ky BP, just after the last glacialmaximum.
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.
Como referenciar
AVILLA, LEONARDO S.; MULLER, LISIANE; GASPARINI, GERMAN M.; SOIBELZON, LEOPOLDO; ABSOLON, BRUNO; PEGO, FREDERICO B.; SILVA, RAFAEL C.; KINOSHITA, ANGELA; FIGUEIREDO, ANA M.G.; BAFFA, OSWALDO. The northernmost record of catagonus stenocephalus (Lund in Reinhardt, 1880) palaeobiogeographical significance. Journal of South American Earth Sciences, v. 42, p. 39-46, 2013. DOI: 10.1016/j.jsames.2012.10.001. Disponível em: http://repositorio.ipen.br/handle/123456789/8433. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.