Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 75
... strongly tuberculate on the inner whorls , yet geographically distinct lineages , e.g. Paracrioceras in the Boreal , and Emericiceras in the Tethyan Realm . To this apparent synchronous development of geographically separate but mor ...
... strongly tuberculate on the inner whorls , yet geographically distinct lineages , e.g. Paracrioceras in the Boreal , and Emericiceras in the Tethyan Realm . To this apparent synchronous development of geographically separate but mor ...
Page 81
... strongly trituberculate major ribs and we are not sure why Collignon did not refer this specimen to Menuthiocrioceras as well . This specimen is , to all appearances , identical to the inner whorls of ' Cryptocrioceras ' yrigoyeni ...
... strongly trituberculate major ribs and we are not sure why Collignon did not refer this specimen to Menuthiocrioceras as well . This specimen is , to all appearances , identical to the inner whorls of ' Cryptocrioceras ' yrigoyeni ...
Page 114
... strongly tuberculate rib followed by three to five weakly tuberculate ribs . In a few cases a pair of flank ribs connect to one of these more pronounced tubercles . All ribs are broad and low and feebly convex across the venter . Less ...
... strongly tuberculate rib followed by three to five weakly tuberculate ribs . In a few cases a pair of flank ribs connect to one of these more pronounced tubercles . All ribs are broad and low and feebly convex across the venter . Less ...
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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