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Artículo

A multi-proxy study of an extinct giant armadillo juvenile unveils the initial life of pampatheres (Cingulata: Xenarthra: Mammalia)

Avilla, Leonardo S.; Gois Lima, FlavioIcon ; Soibelzon, EstebanIcon ; de Abreu, Gabriel Muniz; Rotti, Alline
Fecha de publicación: 07/2022
Editorial: Pergamon-Elsevier Science Ltd
Revista: Journal of South American Earth Sciences
ISSN: 0895-9811
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Naturales y Exactas

Resumen

Fossilization of mammalian young is extremely rare, mainly due to the fragility of bones (smaller and less mineralized) and unfused sutures, which are difficult to preserve during fossil diagenesis. Here, we describe an unprecedented and very complete juvenile of a pampathere, an extinct lineage of Cingulata (Xenarthra). The fossil comprises parts of the skull, mandible, and osteoderms from most regions of the armor, which were exhumed in association at the Gruta do Urso cave, Brazilian Amazon region. Taxonomic analysis of osteoderms and craniofacial features allowed the identification of this specimen as Holmesina. This individual of Holmesina has most of its cranial sutures unfused or in a very initial stage of fusion, and the osteoderms are under mineralized and poorly developed, suggesting a juvenile ontogenetic stage, probably a lactating individual. Although Holmesina is a common South American megafauna representative, little is known about its biology and even less about its initial life. Based on the taphonomic aspects of the fossil, it was buried at the same place of death; but before, its carcass was partially consumed. This study brings valuable information on the earlier stages of anatomy and paleobiology of native extinct South American megafauna.
Palabras clave: BRAZIL , CAVE PALEONTOLOGY , NEWBORN ANATOMY , PAMPATHERIIDAE , PLEISTOCENE , SOUTH AMERICAN NATIVE MAMMALS , TAPHONOMY
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/207711
URL: https://www.sciencedirect.com/science/article/pii/S0895981122002176
DOI: http://dx.doi.org/10.1016/j.jsames.2022.103928
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos(CICYTTP)
Articulos de CENTRO DE INV.CIENT.Y TRANSFERENCIA TEC A LA PROD
Citación
Avilla, Leonardo S.; Gois Lima, Flavio; Soibelzon, Esteban; de Abreu, Gabriel Muniz; Rotti, Alline; A multi-proxy study of an extinct giant armadillo juvenile unveils the initial life of pampatheres (Cingulata: Xenarthra: Mammalia); Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 118; 7-2022; 1-12
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