Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 71
... Systematic palaeontology ខ្ចី ន ន ន ន ន ន 72 72 72 73 73 73 Discussion on shell shape , dimorphism and systematics in Crioceratitinae and Ancyloceratinae 129 Conclusion .... 132 Acknowledgements ... . 132 References .. 132 71 ...
... Systematic palaeontology ខ្ចី ន ន ន ន ន ន 72 72 72 73 73 73 Discussion on shell shape , dimorphism and systematics in Crioceratitinae and Ancyloceratinae 129 Conclusion .... 132 Acknowledgements ... . 132 References .. 132 71 ...
Page 83
... systematic position of Menuthio- crioceras within the Crioceratitinae remains an enigma and it is accorded separ- ate generic status . The ornamentation of ' Cryptocrioceras ' resembles that of Pseudocrioceras ( type species Scaphites ...
... systematic position of Menuthio- crioceras within the Crioceratitinae remains an enigma and it is accorded separ- ate generic status . The ornamentation of ' Cryptocrioceras ' resembles that of Pseudocrioceras ( type species Scaphites ...
Page 132
... systematic point of view , this hypothesis is very attractive , because it would unambiguously clear the way for uniting the sub- families Crioceratitinae and Ancyloceratinae , and would further simplify the systematics of the ...
... systematic point of view , this hypothesis is very attractive , because it would unambiguously clear the way for uniting the sub- families Crioceratitinae and Ancyloceratinae , and would further simplify the systematics of the ...
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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