. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 294 ANNALS OF THE SOUTH AFRICAN MUSEUM Table 4 Some characteristics of the lower teeth and jaws in Adcrocuta, Chasmaporthetes and Euryboas J "—_„„_ .___ aj Shape of jaw (ventral view) Shape of cheektooth row (occlusal view) Canine height Shape of P3 Anterior accessory cusps of P2 and P3 late Miocene Adcrocuta eximia variabilis (China) •straight (?or curved) low rectangular bicuspid or unicuspid latest Miocene/ early Pliocene Adcrocuta australis (Langebaanweg) straight or curved low rectangula so
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 294 ANNALS OF THE SOUTH AFRICAN MUSEUM Table 4 Some characteristics of the lower teeth and jaws in Adcrocuta, Chasmaporthetes and Euryboas J "—_„„_ .___ aj Shape of jaw (ventral view) Shape of cheektooth row (occlusal view) Canine height Shape of P3 Anterior accessory cusps of P2 and P3 late Miocene Adcrocuta eximia variabilis (China) •straight (?or curved) low rectangular bicuspid or unicuspid latest Miocene/ early Pliocene Adcrocuta australis (Langebaanweg) straight or curved low rectangula sometimes absent unicuspid 'Early Pleistocene' Chasmaporthetes kani (China) sometimes absent unicuspid curved low ovate present unicuspid urved curved represented of the later African forms is 'Euryboas' nitidula from Swartkrans, which Galiano & Frailey (1977) believe may be a Chasmaporthetes. In their view referral to this genus would be more certain if 'the condition of P1 and the degree of curvature of the tooth rows' were known (Galiano & Frailey 1977: 9). The condition of P1 is still not known, although it may well have been absent, but the tooth rows, and jaws, are curved (Fig. 10), as in Chasmaporthetes. The case for referral of '£.' nitidula to Chasmaporthetes is thus strengthened and the Swartkrans species is here recognized as Chasmaporthetes nitidula. The date when Chasmaporthetes entered Africa is not known, but it may have postdated its entry into Europe. That unit of the Swartkrans fauna which includes C. nitidula dates back about 1,5 (Vrba 1976), which makes it one of the youngest records of the genus, another being the C. ossifragus from Inglis IA in Florida (Webb 1974). There is thus evidence that in Africa Chasmaporthetes survived longer than Euryboas. Present indications are that Chasmaporthetes was the more widespread, and ultimately also the more successful of the two 'hunting hyaena' genera. It was, in fact, the most widely distributed
Size: 2947px × 848px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
