Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 292
... umkwelanense ' type . C ( c ) In some forms with smooth ' umkwelanense ' type ornament on the phragmo- cone , weak umbilica 1 only , or umbilical and lateral ornament , appears on the body chamber . Dimorphism in the Zululand ...
... umkwelanense ' type . C ( c ) In some forms with smooth ' umkwelanense ' type ornament on the phragmo- cone , weak umbilica 1 only , or umbilical and lateral ornament , appears on the body chamber . Dimorphism in the Zululand ...
Page 305
... umkwelanense ' type of ornament , where the phragmocone remains predominantly smooth . In all the remaining groups , lateral ornament appears at a relatively early ontogenetic stage , and differences are found mainly in the relative ...
... umkwelanense ' type of ornament , where the phragmocone remains predominantly smooth . In all the remaining groups , lateral ornament appears at a relatively early ontogenetic stage , and differences are found mainly in the relative ...
Page 344
... umkwelanense Etheridge , 1904 , P. subkaffrarium Spath , 1921 , P. cf. subkaffrarium Spath , 1921 , Placenticeras n . sp . aff . kaffrarium Venzo , 1936 , merely represent different ontogenetic stages or intraspecific variants of P ...
... umkwelanense Etheridge , 1904 , P. subkaffrarium Spath , 1921 , P. cf. subkaffrarium Spath , 1921 , Placenticeras n . sp . aff . kaffrarium Venzo , 1936 , merely represent different ontogenetic stages or intraspecific variants of P ...
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