Homo naledi pelvic remains from the Dinaledi Chamber, South Africa.

Autor: VanSickle C; Department of Anthropology, Bryn Mawr College, 101 N. Merion Avenue, Bryn Mawr, PA 19010, USA; Department of Anthropology, University of Wisconsin - Madison, 5240 W. H. Sewell Social Science Building, 1180 Observatory Drive, Madison, WI 53706, USA; Evolutionary Studies Institute and Centre for Excellence in Palaeosciences, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa. Electronic address: vansickle.c@gmail.com., Cofran Z; Evolutionary Studies Institute and Centre for Excellence in Palaeosciences, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa; Anthropology Department, Vassar College, 310 Blodgett Hall, 124 Raymond Ave., Poughkeepsie, NY 12604, USA., García-Martínez D; Evolutionary Studies Institute and Centre for Excellence in Palaeosciences, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa; Paleoanthropology Group, Museo Nacional de Ciencias Naturales (MNCN-CSIC), J.G. Abascal 6, 28006 Madrid, Spain., Williams SA; Evolutionary Studies Institute and Centre for Excellence in Palaeosciences, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa; Center for the Study of Human Origins, Department of Anthropology, New York University, 25 Waverly Place, New York, NY 10003, USA; New York Consortium in Evolutionary Primatology, New York, NY 10024, USA., Churchill SE; Evolutionary Studies Institute and Centre for Excellence in Palaeosciences, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa; Department of Evolutionary Anthropology, Duke University, Box 90383, Durham, NC 27708, USA., Berger LR; Evolutionary Studies Institute and Centre for Excellence in Palaeosciences, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa., Hawks J; Department of Anthropology, University of Wisconsin - Madison, 5240 W. H. Sewell Social Science Building, 1180 Observatory Drive, Madison, WI 53706, USA; Evolutionary Studies Institute and Centre for Excellence in Palaeosciences, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa.
Jazyk: angličtina
Zdroj: Journal of human evolution [J Hum Evol] 2018 Dec; Vol. 125, pp. 122-136. Date of Electronic Publication: 2017 Nov 21.
DOI: 10.1016/j.jhevol.2017.10.001
Abstrakt: In the hominin fossil record, pelvic remains are sparse and are difficult to attribute taxonomically when they are not directly associated with craniodental material. Here we describe the pelvic remains from the Dinaledi Chamber in the Rising Star cave system, Cradle of Humankind, South Africa, which has produced hominin fossils of a new species, Homo naledi. Though this species has been attributed to Homo based on cranial and lower limb morphology, the morphology of some of the fragmentary pelvic remains recovered align more closely with specimens attributed to the species Australopithecus afarensis and Australopithecus africanus than they do with those of most (but not all) known species of the genus Homo. As with A. afarensis and A. africanus, H. naledi appears to have had marked lateral iliac flare and either a weakly developed or non-existent acetabulocristal buttress or a distinct, albeit weakly developed, acetabulospinous buttress. At the same time, H. naledi has robust superior pubic and ischiopubic rami and a short ischium with a narrow tuberoacetabular sulcus, similar to those found in modern humans. The fragmentary nature of the Dinaledi pelvic assemblage makes the attribution of sex and developmental age to individual specimens difficult, which in turn diminishes our ability to identify the number of individuals represented in the assemblage. At present, we can only confidently say that the pelvic fossils from Rising Star represent at least four individuals based on the presence of four overlapping right ischial fossils (whereas a minimum of 15 individuals can be identified from the Dinaledi dental assemblage). A primitive, early Australopithecus-like false pelvis combined with a derived Homo-like true pelvis is morphologically consistent with evidence from the lower ribcage and proximal femur of H. naledi. The overall similarity of H. naledi ilia to those of australopiths supports the inference, drawn from the observation of primitive pelvic morphology in the extinct species Homo floresiensis, that there is substantial variation in pelvic form within the genus Homo. In the light of these findings, we urge caution in making taxonomic attributions-even at the genus level-of isolated fossil ossa coxae.
(Copyright © 2017 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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