Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 260
... suture . 2. Comparative ontogenetic studies of the sutures . 3. Number of lobes and saddles in the adult external suture . The family Placenticeratidae is one of several groups of ammonites referred to as ' Pseudoceratites of the ...
... suture . 2. Comparative ontogenetic studies of the sutures . 3. Number of lobes and saddles in the adult external suture . The family Placenticeratidae is one of several groups of ammonites referred to as ' Pseudoceratites of the ...
Page 364
... suture to that of an engonoceratid is possible , but that the reverse ( if Hypengonoceras were to be referred to Placenticeratidae ) is less likely , though possible . Thus , as far as the general outline of the saddles is concerned ...
... suture to that of an engonoceratid is possible , but that the reverse ( if Hypengonoceras were to be referred to Placenticeratidae ) is less likely , though possible . Thus , as far as the general outline of the saddles is concerned ...
Page 401
... suture and the small tubercles along the edge . The external suture consists of short , with strongly separated , lateral extensions , ventral lobes , and 8-9 strongly separated lobes , alternating with bifid blunt saddles . The dorsal ...
... suture and the small tubercles along the edge . The external suture consists of short , with strongly separated , lateral extensions , ventral lobes , and 8-9 strongly separated lobes , alternating with bifid blunt saddles . The dorsal ...
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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