Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 292
... 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 intermediate tubercu- late stage . There is ...
... 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 intermediate tubercu- late stage . There is ...
Page 305
... remains predominantly smooth . In all the remaining groups , lateral ornament appears at a relatively early ontogenetic stage , and differences are found mainly in the relative strength of the umbilical and lateral ornament , and , in ...
... remains predominantly smooth . In all the remaining groups , lateral ornament appears at a relatively early ontogenetic stage , and differences are found mainly in the relative strength of the umbilical and lateral ornament , and , in ...
Page 344
... remains unknown . The Coniacian stratigraphy of Madagascar has recently been reviewed by the authors ( Klinger & Kennedy 1984 ) , clarifying Collignon's ( 1965b ) usage of the terms Lower , Middle and Upper Coniacian . Collignon's Lower ...
... remains unknown . The Coniacian stratigraphy of Madagascar has recently been reviewed by the authors ( Klinger & Kennedy 1984 ) , clarifying Collignon's ( 1965b ) usage of the terms Lower , Middle and Upper Coniacian . Collignon's Lower ...
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