Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 253
... retain the smooth or weakly ornamented stage to much greater diameters and are generally weaker ornamented at maturity than their micro- conch counterpart ( i.e. Stantonoceras vs Placenticeras ) . Partly because of this , Kennedy ...
... retain the smooth or weakly ornamented stage to much greater diameters and are generally weaker ornamented at maturity than their micro- conch counterpart ( i.e. Stantonoceras vs Placenticeras ) . Partly because of this , Kennedy ...
Page 267
... retain Karamaites Sokolov because of lack of evidence of definite dimorphism in that genus , as discussed above . The earliest forms , ' Karamaites ' of the Upper Albian to Middle Cenomanian , are best known from Central Asia . They ...
... retain Karamaites Sokolov because of lack of evidence of definite dimorphism in that genus , as discussed above . The earliest forms , ' Karamaites ' of the Upper Albian to Middle Cenomanian , are best known from Central Asia . They ...
Page 358
... retain the two genera , though fully aware of the range of overlap . Matsumoto ( 1984 : 20–21 ) recently discussed the genus Metaplacenticeras and alleged that a true adventive lobe ( A ) was present in the suture . This is totally at ...
... retain the two genera , though fully aware of the range of overlap . Matsumoto ( 1984 : 20–21 ) recently discussed the genus Metaplacenticeras and alleged that a true adventive lobe ( A ) was present in the suture . This is totally at ...
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