Michel Brunet

Anthropologie et Histoire des Mondes Antiques

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Patrick Vignaud

Institute of Paleoprimatology Human Paleontology Evolution and Paleoenvironments

Andossa Likius

University of N'Djamena

Hassane Taïsso Mackaye

University of N'Djamena

Mathieu Schuster

Centre National de la Recherche Scientifique

Franck Guy

Institute of Paleoprimatology Human Paleontology Evolution and Paleoenvironments

Philippe Duringer

Université de Strasbourg

Olga Otero

Centre National de la Recherche Scientifique

Fabrice Lihoreau

Université de Montpellier

Cécile Blondel

Institute of Paleoprimatology Human Paleontology Evolution and Paleoenvironments

Hassan Taïsso Mackaye

University of N'Djamena

Cooperative Institutions

Centre National de la Recherche Scientifique

213

Université de Poitiers

Institute of Paleoprimatology Human Paleontology Evolution and Paleoenvironments

Sorbonne Université

Muséum national d'Histoire naturelle

Institut de Paléontologie Humaine

Université Claude Bernard Lyon 1

Université Paris Cité

Institut de Recherche pour le Développement

Aix-Marseille Université

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Québec Canada Anglais : deux itinéraires, un affrontement

Michel Brunet

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Structure, ultrastructure et essai d'interprétation fonctionnelle de l'appareil génital femelle d'Hemidiaptomus ingens provinciae et de Mixodiaptomus kupelwieseri (Copepoda, Calanoida). II. L'aire génitale

Canadian Journal of Zoology (1989)

Corinne Cuoc Jean Arnaud Michel Brunet Jacques Mazza

The genital area in Hemidiaptomus ingens provinciae and Mixodiaptomus kupelwieseri is made up of several external and internal solidary cuticular components, which connect the genital ducts with the outside. Its outer part, which is located on the ventral side of the genital segment, is delimited by an ovoid cuticular fold and by two swelling processes, one dorsal and the other ventral. The center is occupied by two operculums, which are separated from a median wall by two crescent-shaped genital apertures. The inner part of the area essentially includes two U-shaped ducts by which the oviducts are connected to the genital apertures. During egg laying, to allow oocytes and oviductal secretions to be carried out through the genital apertures, the ducts take a more or less circular section, owing to the contraction of muscles attached to their wall. At this stage, the genital area is entirely masked by a temporary external seminal receptacle. The genital area assumes a double function in reproduction: first, in stocking spermatozoa in the seminal receptacle, and second, in allowing oocyte laying and fecondation as they are pushed into the ovisac.

Receptacle

Sex organ

10.1139/z89-363

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Capabilities of the WAAS and EGNOS For Time Distribution and Time Transfer

Bill Klepczynski Pat Fenton Ed Powers Michel Brunet Yi Bian

Time transfer

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A New Digital Edition of Greek Inscriptions: the Louvre Collection Project

Michel Brunet

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Assessing endocranial variations in great apes and humans using 3D data from virtual endocasts

American Journal of Physical Anthropology (2011)

Thibaut Bienvenu Franck Guy Walter Coudyzer Emmanuel Gilissen Georges Roualdès

Abstract Modern humans are characterized by their large, complex, and specialized brain. Human brain evolution can be addressed through direct evidence provided by fossil hominid endocasts (i.e. paleoneurology), or through indirect evidence of extant species comparative neurology. Here we use the second approach, providing an extant comparative framework for hominid paleoneurological studies. We explore endocranial size and shape differences among great apes and humans, as well as between sexes. We virtually extracted 72 endocasts, sampling all extant great ape species and modern humans, and digitized 37 landmarks on each for 3D generalized Procrustes analysis. All species can be differentiated by their endocranial shape. Among great apes, endocranial shapes vary from short (orangutans) to long (gorillas), perhaps in relation to different facial orientations. Endocranial shape differences among African apes are partly allometric. Major endocranial traits distinguishing humans from great apes are endocranial globularity, reflecting neurological reorganization, and features linked to structural responses to posture and bipedal locomotion. Human endocasts are also characterized by posterior location of foramina rotunda relative to optic canals, which could be correlated to lesser subnasal prognathism compared to living great apes. Species with larger brains (gorillas and humans) display greater sexual dimorphism in endocranial size, while sexual dimorphism in endocranial shape is restricted to gorillas, differences between males and females being at least partly due to allometry. Our study of endocranial variations in extant great apes and humans provides a new comparative dataset for studies of fossil hominid endocasts. Am J Phys Anthropol, 2011. © 2011 Wiley‐Liss, Inc.

Endocast

Sexual dimorphism

Allometry

Homo sapiens

Crania

Homo erectus

Hominidae

Paleoanthropology

Gorilla

10.1002/ajpa.21488

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Citations (47)