Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 289
... similar diameters to illustrate differing rates of ontogenetic change . The upper specimen already has the mature ' kaffrarium ' ornament , whereas the lower is still at the ' umkwelanense ' stage . Both × 1,5 . Fig . 37. Placenticeras ...
... similar diameters to illustrate differing rates of ontogenetic change . The upper specimen already has the mature ' kaffrarium ' ornament , whereas the lower is still at the ' umkwelanense ' stage . Both × 1,5 . Fig . 37. Placenticeras ...
Page 402
... similar to those of Placenticeras . This genus therefore combines the external characters of Engonoceratidae with the sutural lines of Placenticeratidae , and perhaps ought to be placed in a separate family . The young , however , are ...
... similar to those of Placenticeras . This genus therefore combines the external characters of Engonoceratidae with the sutural lines of Placenticeratidae , and perhaps ought to be placed in a separate family . The young , however , are ...
Page 429
... similar values for equivalent shelf - edge species ( mainly Diaphus dumerilii and Diaphus taaningi ) in the Mauritanian Upwelling region ( Gjøsaeter & Blindheim 1982 , table 77 ) . During winter the frequency of active upwelling is ...
... similar values for equivalent shelf - edge species ( mainly Diaphus dumerilii and Diaphus taaningi ) in the Mauritanian Upwelling region ( Gjøsaeter & Blindheim 1982 , table 77 ) . During winter the frequency of active upwelling is ...
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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