Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 278
... flanks are smooth , save for fine , falcoid or sickle - shaped striae . The curve of the ' sickle ' may be slightly stronger than the haft , producing slight crescents on the ventral half of the flanks . The venter is concave to flat ...
... flanks are smooth , save for fine , falcoid or sickle - shaped striae . The curve of the ' sickle ' may be slightly stronger than the haft , producing slight crescents on the ventral half of the flanks . The venter is concave to flat ...
Page 400
... flanks . The umbilical tubercles are mammiform , pointed on the shell and blunt on internal casts . The external tubercles are elongated longitudinally . The ribs are always sickle - shaped , the most prominent are on the outer part of ...
... flanks . The umbilical tubercles are mammiform , pointed on the shell and blunt on internal casts . The external tubercles are elongated longitudinally . The ribs are always sickle - shaped , the most prominent are on the outer part of ...
Page 404
... flanks are smooth . Along the umbilical edge a series of high tubercles is located . Approximately at mid - flank there are weak bulges . The thickness of the shell differs in different parts of the shell . It reaches maximum thickness ...
... flanks are smooth . Along the umbilical edge a series of high tubercles is located . Approximately at mid - flank there are weak bulges . The thickness of the shell differs in different parts of the shell . It reaches maximum thickness ...
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