Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 258
... lateral orna- ment , especially lateral tubercles , developed - on present evidence , mainly during the Turonian and Coniacian . At present it is not possible to pinpoint the stage at which size related dimorphism gave way to ornament ...
... lateral orna- ment , especially lateral tubercles , developed - on present evidence , mainly during the Turonian and Coniacian . At present it is not possible to pinpoint the stage at which size related dimorphism gave way to ornament ...
Page 306
... tubercles , strong lateral tubercles and strong ventral clavi occur , all connected by prominent ribs . On the adult outer whorls the section becomes rounded and ornament subdued . Examples are NMB D1271 ( macroconch ) ( Fig . 69 ) ...
... tubercles , strong lateral tubercles and strong ventral clavi occur , all connected by prominent ribs . On the adult outer whorls the section becomes rounded and ornament subdued . Examples are NMB D1271 ( macroconch ) ( Fig . 69 ) ...
Page 406
... tubercles occupying a central position on the flanks and by the disappearance of upper lateral tubercles with growth of the shell . ( Free translation from original Russian . ) Baghiceras Chiplonkar & Ghare , 1976 : 3 Type species ...
... tubercles occupying a central position on the flanks and by the disappearance of upper lateral tubercles with growth of the shell . ( Free translation from original Russian . ) Baghiceras Chiplonkar & Ghare , 1976 : 3 Type species ...
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