naa a22 4500 51080876X CHVBK 20180411083431.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s12542-013-0166-4 doi (NATIONALLICENCE)springer-10.1007/s12542-013-0166-4 New material of Pachyarmatherium from the late Pleistocene of northeastern Brazil: insights into its morphology and systematics [Elektronische Daten] [Édison Oliveira, Kleberson de Porpino, Fabiana da Silva] A study of recently collected and other undescribed material of Pachyarmatherium brasiliense from the State of Pernambuco, Brazil, was performed, and its type material was revised, improving our understanding of this species and providing additional information on its affinities. Two fused osteoderms representing the posteriormost osteoderm row of the pectoral buckler are described for the first time in the Pachyarmatherium. Several additional specimens included buckler, border, and at least one caudal osteoderm. The relationships of Pachyarmatherium have been subject to different interpretations. We propose that the presence of some osteoderm features suggests a closer affinity with Dasypodinae/cf. Dasypodini armadillos. A key feature supporting this conclusion is the presence of complementary small figures in adjoining buckler osteoderms of Pachyarmatherium, indicating that a single scale covered portions of three contiguous osteoderms. Other features observed are related to the histological microstructure, which includes a central cortex characterized by a poorly developed cancellous bone and a deep cortex with mineralized collagen fiber bundles that are oriented roughly parallel to the deep osteoderm surface. Likewise, these histological features support its exclusion from glyptodonts and pampatheres, which show a different histological arrangement in their osteoderms. Springer-Verlag Berlin Heidelberg, 2013 Quaternary nationallicence Xenarthra nationallicence Dasypodinae nationallicence Fazenda Nova nationallicence Northeastern Brazil nationallicence Osteoderms nationallicence Quartär nationallicence Xenarthra nationallicence Dasypodinae nationallicence Fazenda Nova nationallicence Nordost-Brasilien nationallicence Osteoderme nationallicence Oliveira Édison Departamento de Geologia, Centro de Tecnologia e Geociências, Universidade Federal de Pernambuco, UFPE, Av. Acadêmico Hélio Ramos s/n, CEP 50740-530, Recife, PE, Brazil aut Porpino Kleberson de Departamento de Ciências Biológicas, Universidade do Estado do Rio Grande do Norte, Rua Antônio Campos s/n, 59610-090, Mossoró, Rio Grande do Norte, Brazil aut da Silva Fabiana Departamento de Geologia, Centro de Tecnologia e Geociências, Universidade Federal de Pernambuco, UFPE, Av. Acadêmico Hélio Ramos s/n, CEP 50740-530, Recife, PE, Brazil aut Paläontologische Zeitschrift Springer Berlin Heidelberg 87/4(2013-12-01), 505-513 0031-0220 87:4<505 2013 87 12542 https://doi.org/10.1007/s12542-013-0166-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12542-013-0166-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Oliveira Édison Departamento de Geologia, Centro de Tecnologia e Geociências, Universidade Federal de Pernambuco, UFPE, Av. Acadêmico Hélio Ramos s/n, CEP 50740-530, Recife, PE, Brazil aut NATIONALLICENCE 700 1- Porpino Kleberson de Departamento de Ciências Biológicas, Universidade do Estado do Rio Grande do Norte, Rua Antônio Campos s/n, 59610-090, Mossoró, Rio Grande do Norte, Brazil aut NATIONALLICENCE 700 1- da Silva Fabiana Departamento de Geologia, Centro de Tecnologia e Geociências, Universidade Federal de Pernambuco, UFPE, Av. Acadêmico Hélio Ramos s/n, CEP 50740-530, Recife, PE, Brazil aut NATIONALLICENCE 773 0- Paläontologische Zeitschrift Springer Berlin Heidelberg 87/4(2013-12-01), 505-513 0031-0220 87:4<505 2013 87 12542 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer