Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 306
... outer whorls the section becomes rounded and ornament subdued . Examples are NMB D1271 ( macroconch ) ( Fig . 69 ) , SAS Z1520a ( macroconch ) ( Fig . 72 ) , NMB D941 / 19 ( ? macroconch ) ( Fig . 73 ) ; in some specimens , e.g. NMB ...
... outer whorls the section becomes rounded and ornament subdued . Examples are NMB D1271 ( macroconch ) ( Fig . 69 ) , SAS Z1520a ( macroconch ) ( Fig . 72 ) , NMB D941 / 19 ( ? macroconch ) ( Fig . 73 ) ; in some specimens , e.g. NMB ...
Page 356
... outer row may be large and clavate ; ribs cross venter transversely and may have trace of siphonal tubercle . Genus is probably too widely drawn ' . Kennedy & Wright ( 1983 : 870 ) repeated this diagnosis almost word for word . Kennedy ...
... outer row may be large and clavate ; ribs cross venter transversely and may have trace of siphonal tubercle . Genus is probably too widely drawn ' . Kennedy & Wright ( 1983 : 870 ) repeated this diagnosis almost word for word . Kennedy ...
Page 400
... outer one lags somewhat in development . On the second whorl a notch arises on the inner flank of the lobe . At this particular stage , a notch arises in the outer parts of the saddle V / U close to its top , from which a secondary lobe ...
... outer one lags somewhat in development . On the second whorl a notch arises on the inner flank of the lobe . At this particular stage , a notch arises in the outer parts of the saddle V / U close to its top , from which a secondary lobe ...
Contents
List of species referred to Placenticeratidae | 384 |
Acknowledgements | 391 |
241 | 393 |
Copyright | |
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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