Volume 14 1972

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Browsing Volume 14 1972 by Author "Mendrez, Christiane Helene"

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    ON CYRBASIODON BOYCEI, BROOM 1931, (CYNODONTIA PROCYNOSUCHIDAE), FROM SOUTH AFRICA
    (BERNARD PRICE INSTITUTE FOR PALAEONTOLOGICAL RESEARCH, 1972) Mendrez, Christiane Helene
    The revision of the type of Cyrbasiodon boycei has led the author to conclude that the maxilla, which constitutes this type, bears fourteen teeth corresponding to a complete maxillary series: 3 precanines, 1 canine and 10 postcanines. The general pattern of the teeth and the aspect of a remnant of secondary palate agree with those of the Cynodontia Procynosuchidae. Within this family, Cyrbasiodon can be favourably compared with the genera Leavachia and Parathrinaxodon. However, because of the anterior breadth of the palatal process of the maxilla, the different number of precanines, and of a slight difference in the canine's ornamentation, it seems preferable to maintain Cyrbasiodon as a separate genus, until the variations of the other Procynosuchidae are better known. The comparison of the tooth pattern of the Procynosuchidae with that of Diarthrognathus has shown strong similarities leading to the conclusion that the tooth pattern of the former foreshadows that of the latter.
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    REVISION DU GENREPROTOCYNODON BROOM 1949 ET DISCUSSION DE SA POSITION TAXONOMIQUE
    (BERNARD PRICE INSTITUTE FOR PALAEONTOLOGICAL RESEARCH, 1972) Mendrez, Christiane Helene
    On revision of Protocynodon pricei Broom 1949, it is concluded that this genus is to be placed amongst the Cynodontia Procynosuchidae. This study completes that undertaken by Broom (1949); it has also enabled us to observe the tooth replacement and, after further preparation, the internal face of the endocranium basis. In preference to the term Bauriamorpha, Scaloposauria has been chosen to include: Ictidosuchidae, Scaloposauridae, Bauriidae, Ericiolacertidae, Lycideopsidae, N anictidopsidae and Silpholestidae. In addition, after comparison between Scaloposauria and Cynodontia on one hand, and between Procynosuchidae and Silphedestidae on the other hand, the author suggests that the latter family should be reviewed and placed amongst the Cynodontia, as indicated by Haughton and Brink in 1954, and Brink (1960a), rather than amongst the Bauriamorpha, as suggested by Watson and Romer in 1956.