Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 74
... consists of strong , trituberculate ribs and intercalatories . Both types pass over the flanks on the whole surface . On the outer whorls all the ribs are the same with smooth bullae . The suture line consists of bifid saddles and ...
... consists of strong , trituberculate ribs and intercalatories . Both types pass over the flanks on the whole surface . On the outer whorls all the ribs are the same with smooth bullae . The suture line consists of bifid saddles and ...
Page 98
... consists of distant umbilical 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 ...
... consists of distant umbilical 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 ...
Page 127
... consists of dense , broad , relatively strong , flexuous crowded ribs . Twenty - 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 ...
... consists of dense , broad , relatively strong , flexuous crowded ribs . Twenty - 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 ...
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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