Enamel microstructure of the hominid KB 5223 from Kromdraai, South Africa

Dados Bibliográficos

ID8312670
AutoresRodrigo S Lacruz (0000-0002-0776-6143, University of Southern California, autor correspondente)
Ano2007
Volume132
Fascículo2
Páginas175-182
Data de publicação2007-02-01
Open AccessSim
TipoARTICLE
PeriódicoAmerican Journal of Physical Anthropology (JOURNAL)
Identificadores do periódicoISSN: 0002-9483 • E-ISSN: 1096-8644
EditoraWiley (PUBLISHER • GB)
DOI10.1002/ajpa.20506
PMID17103424
OpenAlexW2075151626
IdiomaEN
Citações recebidas15
Referências citadas39

The Plio‐Pleistocene site of Kromdraai, South Africa, is well known for the recovery of the holotype of Paranthropus robustus , one of nine individual hominids recovered from this site to date. Among the Kromdraai sample, the specimen KB 5223 comprises several isolated deciduous and permanent lower teeth assigned to Paranthropus , the only recognized genus at this site. However, a more recent analysis of this specimen suggested that it should be classified as Homo. The lower right first permanent molar of KB 5223 had been previously sectioned along the tips of the mesial cusps, exposing its enamel microstructure. Previous studies had indicated differences between Homo and Paranthropus at the microstructural level. A portable confocal scanning microscope was used to describe details of the enamel microstructure of the M 1 and I 1 of this specimen. Angles formed between the striae of Retzius and the enamel dentine junction (EDJ), daily secretion rates in cuspal enamel of the protoconid and metaconid and crown formation time of the RM 1 are provided. The number of perikymata on the right I 1 was counted. Results indicate that some features recorded in the KB 5223 molar differ from those of Paranthropus . However, the number of perikymata on the I 1 is lower than values so far reported for early Homo but similar to Paranthropus . Crown formation time of KB 5223 M 1 was markedly lower than mean values of M 1 in H. sapiens , but similar to other early hominids. Daily secretion rates in the cuspal enamel of KB 5223 M 1 were higher than in modern humans. Am J Phys Anthropol, 2007. © 2006 Wiley‐Liss, Inc

Biology · Enamel paint · Molar · Anatomy · Dentistry · Forensic Anthropology and Bioarchaeology Studies · Medicine · Paleontology · Pleistocene-Era Hominins and Archaeology · Wildlife Ecology and Conservation