Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 243
... diameter . Ut , Lt and Vt respectively refer to the number of umbilical , lateral and ventral tubercles . Figures in parentheses are dimensions as a percentage of the total diameter . SUTURE TERMINOLOGY = = The suture terminology of ...
... diameter . Ut , Lt and Vt respectively refer to the number of umbilical , lateral and ventral tubercles . Figures in parentheses are dimensions as a percentage of the total diameter . SUTURE TERMINOLOGY = = The suture terminology of ...
Page 304
UMBILICAL DIAMETER ( mm ) C 11 10 35- 30- 25- 20-1 15 10- 5 50 100 150 200 DIAMETER ( mm ) 50 100 150 TOTAL DIAMETER ( mm ) 200 250 270 250 Fig . 52. Placenticeras kaffrarium Etheridge , 1904. Total diameter versus umbilical diameter ...
UMBILICAL DIAMETER ( mm ) C 11 10 35- 30- 25- 20-1 15 10- 5 50 100 150 200 DIAMETER ( mm ) 50 100 150 TOTAL DIAMETER ( mm ) 200 250 270 250 Fig . 52. Placenticeras kaffrarium Etheridge , 1904. Total diameter versus umbilical diameter ...
Page 363
... diameter of the wholly septate holotype is 240 mm . Ornament consists of low , rib - like swellings , and , according to Förster , 8 to 10 prorsiradiate umbilical bullae per whorl . It retains the clavate venter to a very large diameter ...
... diameter of the wholly septate holotype is 240 mm . Ornament consists of low , rib - like swellings , and , according to Förster , 8 to 10 prorsiradiate umbilical bullae per whorl . It retains the clavate venter to a very large diameter ...
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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