Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 93
... ventrolateral position , respectively . Differentiation in strength of ... shoulder , and ribs that broaden and weaken across the siphonal area . Some ... ventrolateral tubercles that are radially elongate , although retaining strong ...
... ventrolateral position , respectively . Differentiation in strength of ... shoulder , and ribs that broaden and weaken across the siphonal area . Some ... ventrolateral tubercles that are radially elongate , although retaining strong ...
Page 98
... dorsal impressed zone being distinct , if shallow . The whorl section is typically com- pressed , trapezoidal , with a broad dorsum , broadly rounded umbilical shoulders , flattened convergent flanks , rather narrowly rounded ventrolateral ...
... dorsal impressed zone being distinct , if shallow . The whorl section is typically com- pressed , trapezoidal , with a broad dorsum , broadly rounded umbilical shoulders , flattened convergent flanks , rather narrowly rounded ventrolateral ...
Page 114
... ventrolateral shoulder . Narrow at the umbili- cus , the ribs thicken and strengthen across the flanks . On some ribs there is a slight indication of strengthening at the lower ventrolateral position , although no clearly defined ...
... ventrolateral shoulder . Narrow at the umbili- cus , the ribs thicken and strengthen across the flanks . On some ribs there is a slight indication of strengthening at the lower ventrolateral position , although no clearly defined ...
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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