Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 93
... bullae low on the flank , no obvious tubercles ( but a thickened rib ) at the ventrolateral shoulder , and ribs that broaden and weaken across the siphonal area . Some specimens , e.g. C80060 , remain strongly tuberculate to greater ...
... bullae low on the flank , no obvious tubercles ( but a thickened rib ) at the ventrolateral shoulder , and ribs that broaden and weaken across the siphonal area . Some specimens , e.g. C80060 , remain strongly tuberculate to greater ...
Page 98
... bullae giving rise to groups of two to three ribs with three or four single , non - bullate ribs between . All ribs are delicate , narrow , rursiradiate and rather crowded . They flex backwards and are feebly convex to straight on the ...
... bullae giving rise to groups of two to three ribs with three or four single , non - bullate ribs between . All ribs are delicate , narrow , rursiradiate and rather crowded . They flex backwards and are feebly convex to straight on the ...
Page 127
... - four ribs per whorl arise at the umbilical seam as mere striae . They are prorsiradiate across the umbilical wall and strengthen into feeble bullae at the 5 Blaeske աա ww mm ww CRETACEOUS FAUNAS FROM SOUTH AFRICA 127.
... - four ribs per whorl arise at the umbilical seam as mere striae . They are prorsiradiate across the umbilical wall and strengthen into feeble bullae at the 5 Blaeske աա ww mm ww CRETACEOUS FAUNAS FROM SOUTH AFRICA 127.
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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