Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 243
... discussed by Kullmann & Wiedmann ( 1970 ) is followed here : I interal lobe , U umbilical lobe , L = lateral lobe , E = external lobe . Where necessary , however , Ruzhent- sev's ( 1949 , 1957 ) terminology is also given . DISCUSSION ...
... discussed by Kullmann & Wiedmann ( 1970 ) is followed here : I interal lobe , U umbilical lobe , L = lateral lobe , E = external lobe . Where necessary , however , Ruzhent- sev's ( 1949 , 1957 ) terminology is also given . DISCUSSION ...
Page 264
... discussed elsewhere ( p . 361 ) . For the present it is sufficient to say that the distinguishing feature between Engonoceratidae and Placenticeratidae appears to be the presence of one or more adventive lobes in the former , as ...
... discussed elsewhere ( p . 361 ) . For the present it is sufficient to say that the distinguishing feature between Engonoceratidae and Placenticeratidae appears to be the presence of one or more adventive lobes in the former , as ...
Page 266
... discussed above . These views were accepted by Casey ( 1978 ) . Kennedy & Wright ( 1983 ) derived the mainstream of Placenticeratidae— Karamaites and Placenticeras - from Metaclavites ( Fig . 8 ) and tentatively regarded Hypengonoceras ...
... discussed above . These views were accepted by Casey ( 1978 ) . Kennedy & Wright ( 1983 ) derived the mainstream of Placenticeratidae— Karamaites and Placenticeras - from Metaclavites ( Fig . 8 ) and tentatively regarded Hypengonoceras ...
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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