Volume 09 December 1965
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Browsing Volume 09 December 1965 by Author "Brink, A. S."
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Item A new gomphodont cynodont from the Cynognathus zone of South Africa(Bernard Price Institute for Palaeontological Research, 1965-12) Brink, A. S.This paper describes a somewhat peculiar new gomphodont cynodont from Cynognathus-zone beds of the Karroo System of South Africa. It is a fairly good skull, with lower jaw in position, but lacking the anterior portion of the snout. Its peculiarity lies in the fact that while the posterior portion of the dentary is powerfully expanded in true gomphodont style, the zygomatic arch is very weakly developed, unlike the condition in any of its other cynodont contemporaries. It is described as a new genus and species, Cragievarus kitchingi, generically after the locality Cragievar and specifically after its collector, Mr J. W. Kitching.Item A new Ictidosuchid (Scaloposauria) from the Lystrosaurus-zone(Bernard Price Institute for Palaeontological Research, 1965-12) Brink, A. S.This paper describes a specimen recently discovered in Lystrosaurus-zone strata in the Bergville district of Natal. While a contemporary of Scaloposaurus, it has retained much of the general structure of the earlier lctidosuchidae of the Cistecephalus-zone and in a few minor respects it shows affinity with the Therocephalia, beyond the characteristics of the infra-order. The specimen consists of a good skull with lower jaw, the whole pectoral girdle with the right fore limb, and a length of anterior vertebral column with ribs; these are figured as preserved. The skull is additionally figured in three views with distortion corrected. The specimen is identified as a new genus and species, belonging to the family lctidosuchidae of the infra-order Scaloposauria, and the name Olivieria parringtoni is proposed.Item A new large Bauriamorph from the Cynognathus-zone of South Africa(Bernard Price Institute for Palaeontological Research, 1965-12) Brink, A. S.The specimen forming the subject of this paper is the anterior two-thirds of a very large Bauria skull. It is described as a new species, Bauria robusta. It is pointed out that the skull is perhaps as much as 20 per cent larger than the largest known specimen of Bauria cynops, which in turn is about 15 per cent larger than the average of all other known specimens of the genotype. Many of the measurements are derived from reconstructed figures and if these measurements should prove to be less, the new skull would undoubtedly prove to be proportionally different, in which case its recognition as a new species would be more substantial. The features on which the specimen can at present be recognised as a new species are size, the greater number of cheek teeth (11 as compared with 9 in B. cynops), the weaker canines and the absence of an interpterygoid vacuity.Item On two new specimens of Lystrosaurus-zone cynodonts(Bernard Price Institute for Palaeontological Research, 1965-12) Brink, A. S.In this paper the skulls of two new specimens of Lystrosaurus-zone cynodonts are described. One is a skull of Notictosaurus luckhoffi Broom, and it is pointed out that the other two species, N. gracilis and N. trigonocephalus, are respectively the young and the adult of the genotype. N. gracilis was described on only one small skull amongst more than three skulls and skeletons intimately associated in one block with the skull and skeleton of the adult, only the skull of which was subsequently described as N. trigonocephalus. At the time of description this block was in different fragments and the authors of the new species were not conscious of their association. The second new specimen is a close ally, but different enough to be recognised as a separate genus. While it cannot satisfactorily be contrasted with Cynosuchoides whaitsi, it is identified and described as belonging to this genus and species. Our knowledge thus far of this form is based on one imperfectly preserved skull.