Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 100
... taxonomic pos- ition . We suspect that it may be closer to Menuthiocrioceras than to Crioceratites S.S. Occurrence As yet , C. ( C. ) australis is only known from the first division of the Bar- remian of Zululand . Subfamily ...
... taxonomic pos- ition . We suspect that it may be closer to Menuthiocrioceras than to Crioceratites S.S. Occurrence As yet , C. ( C. ) australis is only known from the first division of the Bar- remian of Zululand . Subfamily ...
Page 131
... taxonomic impli- cations of the recognition of possible dimorphism in the Crioceratitinae and Ancyloceratinae . Taxonomic implications If the association of Acrioceras - ' Emericiceras ' in the Tethyan Realm , Acrioceras - Paracrioceras ...
... taxonomic impli- cations of the recognition of possible dimorphism in the Crioceratitinae and Ancyloceratinae . Taxonomic implications If the association of Acrioceras - ' Emericiceras ' in the Tethyan Realm , Acrioceras - Paracrioceras ...
Page 132
... taxonomic barriers . However , because there is an element of uncertainty , we retain the names Acrioceras and Crioceratites in the systematic description . But , being aware of their possible dimorphic association with Acrioceras ...
... taxonomic barriers . However , because there is an element of uncertainty , we retain the names Acrioceras and Crioceratites in the systematic description . But , being aware of their possible dimorphic association with Acrioceras ...
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Common terms and phrases
Acrioceras Acrioceras sp Africa Aguirre Urreta 1981 ammonites Ammonoidea Ancyloceras Ancyloceratinae Aptian Aspinoceras aspinoceratid australis sp barremense BMNH body chamber Boreal and Tethyan bullae ceras cliff and gully close coiling coarsely ornamented Collignon 1962 compressed Crioceratites Crioceratites s.s. Cryptocrioceras cundimarcae d'Orbigny diameter dimorphism discussion early whorls emerici Emericiceras family Ancyloceratidae flexuous genus genus Crioceratites Geology Giovine group of Crioceratites Hauterivian Hemihoplites sp holotype Immel inner whorls Kakabadze 1981 Leveillé lobe locality 170 Lower Barremian major ribs material Menuthiocrioceras Mlambongwenya Trading Store monopujaae Neuquén Obata outer whorls Palaeontology Paracrioceras Paraspinoceras Patagonia Pedioceras phragmocone Pseudothurmannia Rawson referred ribs Riccardi & Aguirre Sarkar Sornayites South African Museum southern Patagonia Spath species groups specimens tabarelli Astier taxonomic Tethyan Realm text-fig Thieuloy Thomel trituberculate ribs tubercles type species umbilical shoulder umbilical wall uncoiled Unterkreide Upper Barremian Upper Hauterivian Valanginian venter ventral tubercles ventrolateral shoulder whorl section Wiedmann yrigoyeni Leanza zulu sp Zululand