UR 501, l'hominidé du Plio-Pléistocène du Malawi. Analyse de la microanatomie de l'émail

Fernando V. Ramirez Rozzi; Tim Bromage; Friedemann Schrenk

doi:10.1016/S1251-8050(97)88294-8

UR 501, l'hominidé du Plio-Pléistocène du Malawi. Analyse de la microanatomie de l'émail

Translated title of the contribution: UR 501, the Plio-Pleistocene hominid from Malawi. Analysis of the microanatomy of the enamel

Fernando V. Ramirez Rozzi, Tim Bromage, Friedemann Schrenk

Research output: Contribution to journal › Article › peer-review

Abstract

The study of enamel microstructure characteristics was carried out in a mandible of a Plio-Pleistocene hominid (UR 501), found in Chiwondo Beds at Uraha (northern Malawi), dated around 2.5-2.3 Myrs, and attributed to Homo rudolfensis. It indicates that UR 501 dental development shares many patterns with other Plio-Pleistocene hominids, i.e. similar crown formation time in premolars and molars. Nevertheless, differences were found, especially in the lateral enamel thickness. In premolars, lateral enamel is as thin as in early Homo, and in molars it is as thick as in robust australopithecines from East Turkana. The difference between enamel lateral thickness in premolars and molars in UR 501, which is not found in another specimen attributed to H. rudolfensis (KNM-ER 1802), may indicate inter-populational variation in H. rudolfensis.

Translated title of the contribution	UR 501, the Plio-Pleistocene hominid from Malawi. Analysis of the microanatomy of the enamel
Original language	French
Pages (from-to)	231-234
Number of pages	4
Journal	Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes
Volume	325
Issue number	3
DOIs	https://doi.org/10.1016/S1251-8050(97)88294-8
State	Published - Aug 1997

Keywords

Crown formation time
Enamel thickness
H. rudolfensis
Striae of Retzius

ASJC Scopus subject areas

Ecology, Evolution, Behavior and Systematics
Ocean Engineering

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title = "UR 501, l'hominid{\'e} du Plio-Pl{\'e}istoc{\`e}ne du Malawi. Analyse de la microanatomie de l'{\'e}mail",

abstract = "The study of enamel microstructure characteristics was carried out in a mandible of a Plio-Pleistocene hominid (UR 501), found in Chiwondo Beds at Uraha (northern Malawi), dated around 2.5-2.3 Myrs, and attributed to Homo rudolfensis. It indicates that UR 501 dental development shares many patterns with other Plio-Pleistocene hominids, i.e. similar crown formation time in premolars and molars. Nevertheless, differences were found, especially in the lateral enamel thickness. In premolars, lateral enamel is as thin as in early Homo, and in molars it is as thick as in robust australopithecines from East Turkana. The difference between enamel lateral thickness in premolars and molars in UR 501, which is not found in another specimen attributed to H. rudolfensis (KNM-ER 1802), may indicate inter-populational variation in H. rudolfensis.",

keywords = "Crown formation time, Enamel thickness, H. rudolfensis, Striae of Retzius",

author = "{Ramirez Rozzi}, {Fernando V.} and Tim Bromage and Friedemann Schrenk",

note = "Funding Information: of the Malawi Government under the auspices Forschungsgemeinschaft, the L.S.B. Leakey supported by a National Science Foundation (AMICA) of Hunter College, CUNY.",

year = "1997",

month = aug,

doi = "10.1016/S1251-8050(97)88294-8",

language = "French",

volume = "325",

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journal = "Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes",

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AU - Ramirez Rozzi, Fernando V.

AU - Bromage, Tim

AU - Schrenk, Friedemann

N1 - Funding Information: of the Malawi Government under the auspices Forschungsgemeinschaft, the L.S.B. Leakey supported by a National Science Foundation (AMICA) of Hunter College, CUNY.

PY - 1997/8

Y1 - 1997/8

N2 - The study of enamel microstructure characteristics was carried out in a mandible of a Plio-Pleistocene hominid (UR 501), found in Chiwondo Beds at Uraha (northern Malawi), dated around 2.5-2.3 Myrs, and attributed to Homo rudolfensis. It indicates that UR 501 dental development shares many patterns with other Plio-Pleistocene hominids, i.e. similar crown formation time in premolars and molars. Nevertheless, differences were found, especially in the lateral enamel thickness. In premolars, lateral enamel is as thin as in early Homo, and in molars it is as thick as in robust australopithecines from East Turkana. The difference between enamel lateral thickness in premolars and molars in UR 501, which is not found in another specimen attributed to H. rudolfensis (KNM-ER 1802), may indicate inter-populational variation in H. rudolfensis.

AB - The study of enamel microstructure characteristics was carried out in a mandible of a Plio-Pleistocene hominid (UR 501), found in Chiwondo Beds at Uraha (northern Malawi), dated around 2.5-2.3 Myrs, and attributed to Homo rudolfensis. It indicates that UR 501 dental development shares many patterns with other Plio-Pleistocene hominids, i.e. similar crown formation time in premolars and molars. Nevertheless, differences were found, especially in the lateral enamel thickness. In premolars, lateral enamel is as thin as in early Homo, and in molars it is as thick as in robust australopithecines from East Turkana. The difference between enamel lateral thickness in premolars and molars in UR 501, which is not found in another specimen attributed to H. rudolfensis (KNM-ER 1802), may indicate inter-populational variation in H. rudolfensis.

KW - Crown formation time

KW - Enamel thickness

KW - H. rudolfensis

KW - Striae of Retzius

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UR 501, l'hominidé du Plio-Pléistocène du Malawi. Analyse de la microanatomie de l'émail

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