. Bulletin of the British Museum (Natural History), Geology. . Fig. 12. Medial aspect of right cuneiform II. Left to right: T. gelada, T. oswaldi mariae, (Olorgesailie), Cercocebus atys, Mandrillus leucophaeus. Note variation in relative size of facet for 'beak' of cuneiform I (Stippled) Two specimens of the cuboid are present in the collection, both somewhat damaged, but between them representing the whole bone (KNM-OG 1480, 1481). Both are clearly of the highly asymmetrical shape seen in Theropithecus gelada, with the medial face very much less extensive than the lateral. A distinct facet fo
. Bulletin of the British Museum (Natural History), Geology. . Fig. 12. Medial aspect of right cuneiform II. Left to right: T. gelada, T. oswaldi mariae, (Olorgesailie), Cercocebus atys, Mandrillus leucophaeus. Note variation in relative size of facet for 'beak' of cuneiform I (Stippled) Two specimens of the cuboid are present in the collection, both somewhat damaged, but between them representing the whole bone (KNM-OG 1480, 1481). Both are clearly of the highly asymmetrical shape seen in Theropithecus gelada, with the medial face very much less extensive than the lateral. A distinct facet for the sesamoid of M. peroneus longus is present, but this is small relative to the size of the bone. The metatarsus is represented by a number of specimens, of which the following are complete enough to be of descriptive value. The first metatarsal is represented by a single, complete and evidently mature specimen in which the epiphyses are fused (KNM-OG 1482). It is of the left side. The head resembles that of Theropithecus gelada rather closely; there are no large, projecting flanges on either side of the articular surface such as are found in Papio, Mandrillus and the arboreal genera, and which in these forms support the large sesamoids of the long hallucal flexor. The fossil also resembles the gelada in having the head inclined slightly but distinctly medially. The functional significance of this feature is obscure. The base has no large scar marking the area of insertion of the tendon of the M. peroneus longus, again in agreement with Theropithecus gelada and contrasting with the condition seen in other, less terrestrial forms, and the proximal articular surface is more vertically elongated, less curved, than in Papio and Mandrillus, matching the shape of the distal articular surface of the first cunei- Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illus
Size: 2222px × 1124px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
