Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 85
... compressed to depressed , with the greatest breadth at the umbilical spine . In general , ornament is strongest in inflated indi- viduals and weakest in compressed ones ; it will be convenient to describe the species in these terms . E ...
... compressed to depressed , with the greatest breadth at the umbilical spine . In general , ornament is strongest in inflated indi- viduals and weakest in compressed ones ; it will be convenient to describe the species in these terms . E ...
Page 110
... compressed in C80005c to depressed in PCZ8443 ( Figs 28A , 30A - D ) . The dorsum is slightly concave . Ornament on the spire and shaft is extremely variable . At one extreme , as represented by C80005c ( Fig . 28A ) , a compressed ...
... compressed in C80005c to depressed in PCZ8443 ( Figs 28A , 30A - D ) . The dorsum is slightly concave . Ornament on the spire and shaft is extremely variable . At one extreme , as represented by C80005c ( Fig . 28A ) , a compressed ...
Page 114
... compressed forms , such as C80005a ( Fig . 26C ) , are more robustly ribbed and with a distinct rursiradiate style and stronger suggestion of a lower ventrolateral tubercle . These specimens form a link to the coarsely ribbed form ...
... compressed forms , such as C80005a ( Fig . 26C ) , are more robustly ribbed and with a distinct rursiradiate style and stronger suggestion of a lower ventrolateral tubercle . These specimens form a link to the coarsely ribbed form ...
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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