Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 80
... ornament on the outer whorls of C. ( C. ) binelli is unknown in ' Cryptocrioceras ' . Although similarities in style of ornament can be found between ' Crypto- crioceras ' , especially the type species ' C. ' yrigoyeni , and some of the ...
... ornament on the outer whorls of C. ( C. ) binelli is unknown in ' Cryptocrioceras ' . Although similarities in style of ornament can be found between ' Crypto- crioceras ' , especially the type species ' C. ' yrigoyeni , and some of the ...
Page 94
... ornament on the inner whorls , but also the differing ratios of major and minor ribs during the course of ontogeny within the same , and also between different specimens . None of our specimens show the adult , body - chamber ...
... ornament on the inner whorls , but also the differing ratios of major and minor ribs during the course of ontogeny within the same , and also between different specimens . None of our specimens show the adult , body - chamber ...
Page 97
... ornament soon gives way to slightly flexuous , sometimes bifurcating ribbing . Coiling in C. janus is also relatively tight and comparable to that of C. ( C. ) yrigoyeni , and not at all as loosely coiled as in typical C. barremense , C ...
... ornament soon gives way to slightly flexuous , sometimes bifurcating ribbing . Coiling in C. janus is also relatively tight and comparable to that of C. ( C. ) yrigoyeni , and not at all as loosely coiled as in typical C. barremense , C ...
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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