Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 278
... 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 and smooth ...
... 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 and smooth ...
Page 292
... smooth ' umkwelanense ' stage and remains smooth throughout . At the end of the adult phragmocone , and on the body chamber , however , the venter becomes distinctly rounded , albeit very narrow in extreme cases , without an ...
... smooth ' umkwelanense ' stage and remains smooth throughout . At the end of the adult phragmocone , and on the body chamber , however , the venter becomes distinctly rounded , albeit very narrow in extreme cases , without an ...
Page 305
... smooth to tuberculate to rounded and smooth , or directly from flat and smooth to rounded and smooth without an intermediate tuberculate stage . Examples are SAS Z1520g ( macro- conch ) and NMB D1269 ( macroconch , Fig . 56 ) . These ...
... smooth to tuberculate to rounded and smooth , or directly from flat and smooth to rounded and smooth without an intermediate tuberculate stage . Examples are SAS Z1520g ( macro- conch ) and NMB D1269 ( macroconch , Fig . 56 ) . These ...
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