Search

Your search keyword '"Kelley, Jay"' showing total 28 results
Start Over Author "Kelley, Jay" Journal journal of human evolution
28 results on '"Kelley, Jay"'

23. Dental remains of Equatorius africanus from Kipsaramon, Tugen Hills, Baringo District, Kenya

Author

Kelley, Jay, Ward, Steve, Brown, Barbara, Hill, Andrew, and Duren, Dana L.

Subjects
*DENTAL anthropology
Abstract

Forty-one isolated large hominoid teeth, as well as most of the mandibular and three maxillary teeth associated with a partial skeleton, were recovered from middle Miocene Muruyur sediments near Kipsaramon in the Tugen Hills, Baringo District, Kenya. The isolated teeth were collected as surface finds and the skeleton was excavated in situ at locality BPRP#122 dated between 15·58 Ma and 15·36 Ma. The majority of the teeth recovered at BPRP#122 are referable to a minimum of five individuals of the hominoid Equatorius africanus. Three of the teeth, however, are provisionally assigned to Nyanzapithecus sp. The new hominoids from Kipsaramon add to an increasing inventory of specimens that suggest greater large hominoid taxonomic diversity from the middle Miocene of Kenya than was previously recognized. It is suggested that there are two large-bodied hominoid species present at Mabako, only one of which is assignable toEquatorius. [Copyright &y& Elsevier]

Published
2002
Full Text
View/download PDF

28. New Sivapithecus postcranial specimens from the Siwaliks of Pakistan

Author

Madar, Sandra I., Rose, Michael D., Kelley, Jay, MacLatchy, Laura, and Pilbeam, David

Subjects
*SIVAPITHECUS (Fossil primates), *FEMUR
Abstract

Several new postcranial elements of Sivapithecus from the Siwaliks of Pakistan are described. These include a distal femur from the U-level of the Dhok Pathan Formation, a navicular from the Chinji Formation, and seven manual and pedal phalanges from the Nagri Formation. The functional morphology of these elements adds new detail to the reconstruction ofSivapithecus positional behavior. Femoral cross-sectional geometry indicates that the shaft was adapted to support mediolaterally directed loading. Femoral condylar asymmetry and a broad but shallow trochlea are distinctly ape-like, revealing capabilities for both rotation and withstanding eccentric loading in the knee. The navicular is characterized by features relating to a broad mid-tarsus and broad distal articulations for the cuneiforms. It also lacks a navicular tubercle as in Pongo. These features suggest that the foot was capable of a powerful grip on large supports, with an inversion/supination capability that would permit foot placement in a variety of positions. The morphology of the new phalanges, including evidence for a relatively large pollex, similarly suggests powerful grasping, consistent with prior evidence from the hallux and tarsus. The functional features of the new specimens permit refinement of previous interpretations of Sivapithecus positional capabilities. They suggest a locomotor repertoire dominated by pronograde activities and also such antipronograde activities as vertical climbing and clambering, but not by antipronograde suspensory activities as practiced by extant apes. [Copyright &y& Elsevier]

Published
2002
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results