Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 264
... bases of the first three lateral lobes ( Ruzhentsev's L , U2U1 ) widen and are bulb - like at the base , but become narrower at the neck . An apparent final trend in sutural development of the Placenticeratidae is to be found in the ...
... bases of the first three lateral lobes ( Ruzhentsev's L , U2U1 ) widen and are bulb - like at the base , but become narrower at the neck . An apparent final trend in sutural development of the Placenticeratidae is to be found in the ...
Page 400
... base at the posterior . The first lobe is always slanted towards the second . The fourth lobe is very small , smaller by far than the fifth lobe . The transformation of the first umbilical lobe comes about by means of formation at its base ...
... base at the posterior . The first lobe is always slanted towards the second . The fourth lobe is very small , smaller by far than the fifth lobe . The transformation of the first umbilical lobe comes about by means of formation at its base ...
Page 401
... base of the second and third lobes . Of the genus Anaplacenticeras Iljin ( 1959 ) characterized by the presence of a ... bases , situated on well - defined stems . ( Free translation from original Russian . ) Beschtubeites Iljin , 1975 ...
... base of the second and third lobes . Of the genus Anaplacenticeras Iljin ( 1959 ) characterized by the presence of a ... bases , situated on well - defined stems . ( Free translation from original Russian . ) Beschtubeites Iljin , 1975 ...
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