Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 262
... saddle E / L ( Ruzhentsev V / U ) ; and , division of the saddle L / U2 ( Ruzhentsev U1 / U1 ) . According to Mirzoev ( 1967 ) and Michailova ( 1974 , 1978 ) , the lateral lobe L ( Ruzhentsev U ) divides into two unequal parts very ...
... saddle E / L ( Ruzhentsev V / U ) ; and , division of the saddle L / U2 ( Ruzhentsev U1 / U1 ) . According to Mirzoev ( 1967 ) and Michailova ( 1974 , 1978 ) , the lateral lobe L ( Ruzhentsev U ) divides into two unequal parts very ...
Page 263
... saddle E / L . The time of formation seems to be crucial for definition . According to Schindewolf ( 1967 : 803 ( 725 ) ) the umbilical lobes are formed at an early ontogenetic stage - prior to incision of the saddles and the lobes ...
... saddle E / L . The time of formation seems to be crucial for definition . According to Schindewolf ( 1967 : 803 ( 725 ) ) the umbilical lobes are formed at an early ontogenetic stage - prior to incision of the saddles and the lobes ...
Page 362
... saddle split into two portions by a deep adventitious lobe , so that the external saddle appears divided into four portions instead of three ; the suture has numerous inflections , but is very slightly frilled , the summit of the saddles ...
... saddle split into two portions by a deep adventitious lobe , so that the external saddle appears divided into four portions instead of three ; the suture has numerous inflections , but is very slightly frilled , the summit of the saddles ...
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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