Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 264
... Engonoceratidae . As yet , the sutural ontogeny of Hypengonoceras is unknown , and reference to the Placenticeratidae appears to be based on stratigraphic rather than phylogenetic evidence . Details of this are discussed elsewhere ( p ...
... Engonoceratidae . As yet , the sutural ontogeny of Hypengonoceras is unknown , and reference to the Placenticeratidae appears to be based on stratigraphic rather than phylogenetic evidence . Details of this are discussed elsewhere ( p ...
Page 364
... Engonoceratidae or of the Placenticeratidae ? If the latter , what is its relationship with the early placenticeratids ' Karamaites ' and Hengestites ? Engonoceratidae and Placenticeratidae are generally distinguished by the simplified ...
... Engonoceratidae or of the Placenticeratidae ? If the latter , what is its relationship with the early placenticeratids ' Karamaites ' and Hengestites ? Engonoceratidae and Placenticeratidae are generally distinguished by the simplified ...
Page 365
... Engonoceratidae , rather than the predominantly Upper Cretaceous Placenticeratidae . As far as the sutural ontogeny is concerned , there is little doubt that Parengonoceras has two true adventive lobes , and that the lateral lobe ...
... Engonoceratidae , rather than the predominantly Upper Cretaceous Placenticeratidae . As far as the sutural ontogeny is concerned , there is little doubt that Parengonoceras has two true adventive lobes , and that the lateral lobe ...
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