Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 343
... populations are dominated by ' subkaffrarium ' morphotypes with distinct trigonal whorl section and strong umbilical tubercles , succeeded by populations in which ' kaffrarium ' forms , with polygonal whorl section and lateral tubercles ...
... populations are dominated by ' subkaffrarium ' morphotypes with distinct trigonal whorl section and strong umbilical tubercles , succeeded by populations in which ' kaffrarium ' forms , with polygonal whorl section and lateral tubercles ...
Page 450
... populations . The isolated site off Walvis Bay is a single dead adult valve , and we are not in a position to determine its true status . Its transportation as a relatively fragile clast 650 km from the the Orange Shelf population seems ...
... populations . The isolated site off Walvis Bay is a single dead adult valve , and we are not in a position to determine its true status . Its transportation as a relatively fragile clast 650 km from the the Orange Shelf population seems ...
Page 453
... population ) plotted against water depth . The populations of the two species are separated by 1 500 m of water on the continental slope which contains the following physico - chemical barriers : salinity minimum zone of the Antarctic ...
... population ) plotted against water depth . The populations of the two species are separated by 1 500 m of water on the continental slope which contains the following physico - chemical barriers : salinity minimum zone of the Antarctic ...
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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