Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 262
... saddle E / L ( Ruzhentsev V / U ) ; and , division of the saddle L / U2 ( Ruzhentsev U1 / U1 ) . According to Mirzoev ( 1967 ) and Michailova ( 1974 , 1978 ) , the lateral lobe L ( Ruzhentsev U ) divides into two unequal parts very ...
... saddle E / L ( Ruzhentsev V / U ) ; and , division of the saddle L / U2 ( Ruzhentsev U1 / U1 ) . According to Mirzoev ( 1967 ) and Michailova ( 1974 , 1978 ) , the lateral lobe L ( Ruzhentsev U ) divides into two unequal parts very ...
Page 263
... saddle E / L . The time of formation seems to be crucial for definition . According to Schindewolf ( 1967 : 803 ( 725 ) ) the umbilical lobes are formed at an early ontogenetic stage - prior to incision of the saddles and the lobes ...
... saddle E / L . The time of formation seems to be crucial for definition . According to Schindewolf ( 1967 : 803 ( 725 ) ) the umbilical lobes are formed at an early ontogenetic stage - prior to incision of the saddles and the lobes ...
Page 362
... saddle split into two portions by a deep adventitious lobe , so that the external saddle appears divided into four portions instead of three ; the suture has numerous inflections , but is very slightly frilled , the summit of the saddles ...
... saddle split into two portions by a deep adventitious lobe , so that the external saddle appears divided into four portions instead of three ; the suture has numerous inflections , but is very slightly frilled , the summit of the saddles ...
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