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 ...
Contents
List of species referred to Placenticeratidae | 384 |
Acknowledgements | 391 |
241 | 393 |
Copyright | |
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Common terms and phrases
9 figs adult adventive lobe Albian ammonite Anaplacenticeras body chamber Campanian of Germany Cenomanian Cenomanian of Central Cenomanian-Turonian of India Central Asia Chiplonkar & Ghare Cobban Collignon 1965a compressed Coniacian diameter dimorphism Engonoceratidae flanks forms fritschi de Grossouvre genus Gissarites Grossouvre Hengestites holotype Hoplitidae Hoplitoplacenticeras Hypengonoceras decaryi Collignon Iljin incision India Chiplonkar intraspecific variation Karamaites Kennedy & Wright Klinger Knemiceras Kopetdagites Kossmat lateral lobe lateral ornament lateral tubercles lectotype Luppov Maastrichtian Macroconch Madagascar Metaplacenticeras Michailova Microconch with type ontogenetic ontogenetic changes ontogenetic stage Parengonoceras Paulcke phragmocone Placenticeras fritschi Placenticeras kaffrarium Etheridge Placenticeras polyopsis Dujardin Placenticeras syrtale Morton Placenticeratidae Proplacenticeras Reeside ribs rounded Ruzhentsev Santonian Santonian of France scaphitoid uncoiling Schlüter shell Spath Stantonoceras subkaffrarium sutural ontogeny suture line text-fig ticeras Turonian type 4 ornament Type species umbilical edge umbilical tubercles umbilical wall umbilicus Upper Albian Upper Campanian Upper Cretaceous ventral clavi whorl section Wiedmann Zululand