Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 267
... ventral clavi , which are demonstrably the base of a septate spine in some ; lateral sickle - shaped ribs with or without lateral thickening or tuberculation . Umbilical tubercles may or may not migrate away from umbilical edge towards ...
... ventral clavi , which are demonstrably the base of a septate spine in some ; lateral sickle - shaped ribs with or without lateral thickening or tuberculation . Umbilical tubercles may or may not migrate away from umbilical edge towards ...
Page 360
... clavus , curve slightly forward and end in outer ventral clavi . The ventrolateral and ventral clavi correspond on either side of the venter . This type of ornament is present in all four specimens , but that of D1314 ( Fig . 14B ) is ...
... clavus , curve slightly forward and end in outer ventral clavi . The ventrolateral and ventral clavi correspond on either side of the venter . This type of ornament is present in all four specimens , but that of D1314 ( Fig . 14B ) is ...
Page 406
... ventral clavi ; while from the genus Diplacmoceras it differs in not having pinched ear - like ventral clavi and ventrolateral tubercles . The genus Hoplitoplacenticeras differs from the present genus in having typically trapezoidal ...
... ventral clavi ; while from the genus Diplacmoceras it differs in not having pinched ear - like ventral clavi and ventrolateral tubercles . The genus Hoplitoplacenticeras differs from the present genus in having typically trapezoidal ...
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Common terms and phrases
adult adventive lobe Albian ammonites Atlantic Benson body chamber bottom depth Campanian Cape Town catch rates Cenomanian Central Asia Chiplonkar & Ghare compressed Coniacian continental diameter Diaphus dimorphism distribution Engonoceratidae fauna flanks genus Group holotype Hoplitoplacenticeras Hulley Hyatt Hypengonoceras decaryi Collignon Iljin intraspecific variation isobath Karamaites Kennedy & Wright Klinger Lampanyctodes hectoris lanternfish lateral lobe lateral ornament lateral tubercles Maastrichtian Macroconch Madagascar Marine Metaplacenticeras Michailova Microconch with type myctophid oceanic ontogenetic changes ontogeny Orange Shelf ostracod Parengonoceras Paulcke pelagic phragmocone Placenticeras kaffrarium Etheridge Placenticeras polyopsis Placenticeratidae polyopsis Dujardin Proplacenticeras pseudoceanic ribs saddle Santonian separated Shannon shell smooth South African Museum south-western Africa southern Benguela region Spath specimens specimens.h¹ stage stations subkaffrarium sutural ontogeny suture suture line SW Cape temperature text-fig Turonian Type species umbilical tubercles umbilicus umkwelanense Upper Albian Upper Campanian Upper Cretaceous upwelling venter ventral clavi Whatley whorl section Wiedmann Zululand