Annals of the South African MuseumThe Museum, 1989 - Natural history |
From inside the book
Results 1-3 of 24
Page 305
... relatively early ontogenetic stage , and differences are found mainly in the relative strength of the umbilical and lateral ornament , and , in consequence , the whorl section . Type 4. Here umbilical tubercles and ventral clavi develop ...
... relatively early ontogenetic stage , and differences are found mainly in the relative strength of the umbilical and lateral ornament , and , in consequence , the whorl section . Type 4. Here umbilical tubercles and ventral clavi develop ...
Page 399
... relatively short branches ; the inner one of which is longer than the outer . The second lobe which divides the first lateral saddle attains the length of the outer branch of the umbilical lobe . Species composition . Type species ...
... relatively short branches ; the inner one of which is longer than the outer . The second lobe which divides the first lateral saddle attains the length of the outer branch of the umbilical lobe . Species composition . Type species ...
Page 402
... relatively shallow ventral lobes and 8–9 lobes alternating with saddles . The first lobe is parallel or slightly slanted towards the second lobe . The fourth lobe is somewhat smaller , rarely equal to the fifth lobe . The fifth lobe is ...
... relatively shallow ventral lobes and 8–9 lobes alternating with saddles . The first lobe is parallel or slightly slanted towards the second lobe . The fourth lobe is somewhat smaller , rarely equal to the fifth lobe . The fifth lobe is ...
Other editions - View all
Common terms and phrases
adult adventive lobe Albian ammonites Atlantic Benson body chamber bottom depth Campanian Cape Town catch rates Cenomanian Central Asia Chiplonkar & Ghare compressed Coniacian continental diameter Diaphus dimorphism distribution Engonoceratidae fauna flanks genus Group holotype Hoplitoplacenticeras Hulley Hyatt Hypengonoceras decaryi Collignon Iljin intraspecific variation isobath Karamaites Kennedy & Wright Klinger Lampanyctodes hectoris lanternfish lateral lobe lateral ornament lateral tubercles Maastrichtian Macroconch Madagascar Marine Metaplacenticeras Michailova Microconch with type myctophid oceanic ontogenetic changes ontogeny Orange Shelf ostracod Parengonoceras Paulcke pelagic phragmocone Placenticeras kaffrarium Etheridge Placenticeras polyopsis Placenticeratidae polyopsis Dujardin Proplacenticeras pseudoceanic ribs saddle Santonian separated Shannon shell smooth South African Museum south-western Africa southern Benguela region Spath specimens specimens.h¹ stage stations subkaffrarium sutural ontogeny suture suture line SW Cape temperature text-fig Turonian Type species umbilical tubercles umbilicus umkwelanense Upper Albian Upper Campanian Upper Cretaceous upwelling venter ventral clavi Whatley whorl section Wiedmann Zululand