Annals of the South African MuseumThe Museum, 1989 - Natural history |
From inside the book
Results 1-3 of 36
Page 264
... genus Parengonoceras Spath , 1924 ( of Engonocera- tidae ) , the sutures are finely incised , and morphological transitions to the genus Hypengonoceras ( of Placenticeratidae as interpreted by Kennedy & Wright ( 1983 ) ) occur , as ...
... genus Parengonoceras Spath , 1924 ( of Engonocera- tidae ) , the sutures are finely incised , and morphological transitions to the genus Hypengonoceras ( of Placenticeratidae as interpreted by Kennedy & Wright ( 1983 ) ) occur , as ...
Page 404
... genus Placenticeras Meek ( Pl . kharesmense Lah . , Pl . arkhangelskii Iljin ) by a stepped form of umbilicus , very small umbilical tubercles , and a distinct umbilical edge . The last two characteristics connect the genus with the genus ...
... genus Placenticeras Meek ( Pl . kharesmense Lah . , Pl . arkhangelskii Iljin ) by a stepped form of umbilicus , very small umbilical tubercles , and a distinct umbilical edge . The last two characteristics connect the genus with the genus ...
Page 406
... genus Diplacmoceras it differs in not having pinched ear - like ventral clavi and ventrolateral tubercles . The genus Hoplitoplacenticeras differs from the present genus in having typically trapezoidal cross - section and by outward ...
... genus Diplacmoceras it differs in not having pinched ear - like ventral clavi and ventrolateral tubercles . The genus Hoplitoplacenticeras differs from the present genus in having typically trapezoidal cross - section and by outward ...
Contents
List of species referred to Placenticeratidae | 384 |
Acknowledgements | 391 |
241 | 393 |
Copyright | |
1 other sections not shown
Other editions - View all
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