. Bulletin of the British Museum (Natural History), Geology. * lateral. Fig. 10 Cross-sections near base of horn cores. A = Proamphibos lachrynians, cast of holotype; a cross-section of the right horn core has been reversed to appear as of the left side. B = Ugandax gautieri holotype, left horn core. The most important of the irregular partial keels of U. gautieri descends at the position marked by the arrow. Pilgrim (1939 : 276) took the reasonable view that Proamphibos gave rise through Hemibos to the living Asiatic water buffaloes Bubalus. If the Kazinga Channel deposits were sufficiently o
. Bulletin of the British Museum (Natural History), Geology. * lateral. Fig. 10 Cross-sections near base of horn cores. A = Proamphibos lachrynians, cast of holotype; a cross-section of the right horn core has been reversed to appear as of the left side. B = Ugandax gautieri holotype, left horn core. The most important of the irregular partial keels of U. gautieri descends at the position marked by the arrow. Pilgrim (1939 : 276) took the reasonable view that Proamphibos gave rise through Hemibos to the living Asiatic water buffaloes Bubalus. If the Kazinga Channel deposits were sufficiently old, Ugandax gautieri could be near the start of the lineage of the African buffalo Syncerus. The near- absence of keels on its horn cores, less neat surface texture at the base of the horn cores, lower occipital surface, wider basioccipital anterior tuberosities and perhaps the less advanced teeth are all compatible with this view. U. gautieri is too primitive a species for us to expect any more definite indications of relationship. One possible intermediate between U. gautieri and Syncerus acoelotus is the Shungura Formation Syncerus, already mentioned above. This has an occipital surface still lower and wider than in U. gautieri and probably a shorter braincase, and such a trend in development of skull proportions parallels what took place in the evolution of Bubalus. The Simatherium-Pelorovis lineage is also related to the Syncerus lineage, and might also have come from a form like U. gautieri. Perhaps the three bovine successions, Leptobos to Bos, Pro- amphibos to Bubalus via Hemibos, and Ugandax to Syncerus, all arose from a genus such as Pachyportax Pilgrim in the upper Miocene. In view of the past connections of Indian and African bovid faunas (Gentry 1970a: 316-317) it is interesting that U. gautieri agrees so well with the Siwaliks Proamphibos. However, a careful study of the European Pliocene fossils of Parabos Arambourg & Piveteau might demonstrate equally close
Size: 2727px × 917px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
