Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 278
... typical forms can be approximately divided into four stages . ( a ) Embryonic stage . This includes the very early stage with the protoconch and subsequent early whorls . This can be seen in NMB D941 / 7 ( Fig . 23E - F ) , NMB D1150 ...
... typical forms can be approximately divided into four stages . ( a ) Embryonic stage . This includes the very early stage with the protoconch and subsequent early whorls . This can be seen in NMB D941 / 7 ( Fig . 23E - F ) , NMB D1150 ...
Page 306
... typical ' subkaffrarium ' type of sculpture where umbilical ornament is dominant , and the whorl section is distinctly subtrigonal . Typical examples are SAS Z201 ( macroconch ) , SAS Z202 ( macroconch ) ( Figs 57-58 ) , NMB D941 / 2 ...
... typical ' subkaffrarium ' type of sculpture where umbilical ornament is dominant , and the whorl section is distinctly subtrigonal . Typical examples are SAS Z201 ( macroconch ) , SAS Z202 ( macroconch ) ( Figs 57-58 ) , NMB D941 / 2 ...
Page 365
... typical sagging zig - zag outline of typical Placenticeratidae . In addition , the lobes are splayed and digitate - like the fingers of a glove . No detailed ontogenetic studies have as yet been undertaken on Hypengonoceras , neither is ...
... typical sagging zig - zag outline of typical Placenticeratidae . In addition , the lobes are splayed and digitate - like the fingers of a glove . No detailed ontogenetic studies have as yet been undertaken on Hypengonoceras , neither is ...
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