Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 264
... occur , as demonstrated by Renz ( 1970 ) . The only way to distinguish between Parengonoceras and Hypengonoceras is by means of sutural ontogeny . Unequivocal adventive lobes occur in Parengonoceras ( Fig . 18 ) , which clearly places ...
... occur , as demonstrated by Renz ( 1970 ) . The only way to distinguish between Parengonoceras and Hypengonoceras is by means of sutural ontogeny . Unequivocal adventive lobes occur in Parengonoceras ( Fig . 18 ) , which clearly places ...
Page 407
... occur . ' Placentoscaphites Chiplonkar & Ghare , 1977 : 68–69 ' Genotype . Placentoscaphites dangerfieldi sp . nov . Diagnosis Shell moderately large with oval umbilicus ; whorls more or less compressed to convex and tumid ...
... occur . ' Placentoscaphites Chiplonkar & Ghare , 1977 : 68–69 ' Genotype . Placentoscaphites dangerfieldi sp . nov . Diagnosis Shell moderately large with oval umbilicus ; whorls more or less compressed to convex and tumid ...
Page 430
... occurred where sea - surface temperatures ranged between 14,0 ° C and 15,5 ° C , and larval abundances were greatest seaward of the 100 fm ( 183 m ) isobath . Since both data ... occur and may account 430 ANNALS OF THE SOUTH AFRICAN MUSEUM.
... occurred where sea - surface temperatures ranged between 14,0 ° C and 15,5 ° C , and larval abundances were greatest seaward of the 100 fm ( 183 m ) isobath . Since both data ... occur and may account 430 ANNALS OF THE SOUTH AFRICAN MUSEUM.
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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