Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 400
... Shells are compressed with narrow , funnel - shaped umbilicus , smooth venter and slightly curved flanks . The ... shell is covered with fine sickle - shaped striae . The lobes are strongly separated by means of asymmetrical bases ...
... Shells are compressed with narrow , funnel - shaped umbilicus , smooth venter and slightly curved flanks . The ... shell is covered with fine sickle - shaped striae . The lobes are strongly separated by means of asymmetrical bases ...
Page 404
... Shell discoidal , involute with narrow umbilicus and wedge - shaped whorl section . Maximum width is located at the ... shell differs in different parts of the shell . It reaches maximum thickness in the region of the umbilicus on the ...
... Shell discoidal , involute with narrow umbilicus and wedge - shaped whorl section . Maximum width is located at the ... shell differs in different parts of the shell . It reaches maximum thickness in the region of the umbilicus on the ...
Page 407
... shell growth from compressed to circular . The genus is named after Malwa , the region in which the Bagh Beds occur . ' Placentoscaphites Chiplonkar & Ghare , 1977 : 68-69 ' Genotype . Placentoscaphites dangerfieldi sp . nov . Diagnosis ...
... shell growth from compressed to circular . The genus is named after Malwa , the region in which the Bagh Beds occur . ' Placentoscaphites Chiplonkar & Ghare , 1977 : 68-69 ' Genotype . Placentoscaphites dangerfieldi sp . nov . Diagnosis ...
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