Annals of the South African MuseumThe Museum, 1989 - Natural history |
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Page 245
Other comments on the wide intraspecific variation in placenticeratids are found widely scattered in the literature , e.g. Paulcke ( 1907 ) , Reeside ( 1927b ) , Howarth ( 1965 ) , Wolleben ( 1967 ) , Summesberger ( 1979 ) , Klinger ...
Other comments on the wide intraspecific variation in placenticeratids are found widely scattered in the literature , e.g. Paulcke ( 1907 ) , Reeside ( 1927b ) , Howarth ( 1965 ) , Wolleben ( 1967 ) , Summesberger ( 1979 ) , Klinger ...
Page 258
... VARIATION IN RELATIVE PROPORTIONS Intraspecific variation in the strict sense is difficult to separate satisfactorily from the other variable factors , unless dealing with adult specimens . In immature phragmocones one is never sure if ...
... VARIATION IN RELATIVE PROPORTIONS Intraspecific variation in the strict sense is difficult to separate satisfactorily from the other variable factors , unless dealing with adult specimens . In immature phragmocones one is never sure if ...
Page 383
... intraspecific variation ( e.g. Hyatt 1903 ; Reeside 1927b ; Wolleben 1967 ; Kennedy & Wright 1983 ) . This raises the question why this intraspecific variation is so widespread in the Placenticeratidae and , for that matter , most of ...
... intraspecific variation ( e.g. Hyatt 1903 ; Reeside 1927b ; Wolleben 1967 ; Kennedy & Wright 1983 ) . This raises the question why this intraspecific variation is so widespread in the Placenticeratidae and , for that matter , most of ...
Contents
List of species referred to Placenticeratidae | 384 |
Acknowledgements | 391 |
241 | 393 |
Copyright | |
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9 figs adult adventive lobe Albian ammonite Anaplacenticeras body chamber Campanian of Germany Cenomanian Cenomanian of Central Cenomanian-Turonian of India Central Asia Chiplonkar & Ghare Cobban Collignon 1965a compressed Coniacian diameter dimorphism Engonoceratidae flanks forms fritschi de Grossouvre genus Gissarites Grossouvre Hengestites holotype Hoplitidae Hoplitoplacenticeras Hypengonoceras decaryi Collignon Iljin incision India Chiplonkar intraspecific variation Karamaites Kennedy & Wright Klinger Knemiceras Kopetdagites Kossmat lateral lobe lateral ornament lateral tubercles lectotype Luppov Maastrichtian Macroconch Madagascar Metaplacenticeras Michailova Microconch with type ontogenetic ontogenetic changes ontogenetic stage Parengonoceras Paulcke phragmocone Placenticeras fritschi Placenticeras kaffrarium Etheridge Placenticeras polyopsis Dujardin Placenticeras syrtale Morton Placenticeratidae Proplacenticeras Reeside ribs rounded Ruzhentsev Santonian Santonian of France scaphitoid uncoiling Schlüter shell Spath Stantonoceras subkaffrarium sutural ontogeny suture line text-fig ticeras Turonian type 4 ornament Type species umbilical edge umbilical tubercles umbilical wall umbilicus Upper Albian Upper Campanian Upper Cretaceous ventral clavi whorl section Wiedmann Zululand