Annals of the South African MuseumThe Museum, 1989 - Natural history |
From inside the book
Results 1-3 of 18
Page 258
... appears to be in part independent of ontogenetic change , and part of true intraspecific variation . Intraspecific ... appear on the flanks at the point where the ribs bifurcate . Distinct swellings or tubercles develop mainly during the ...
... appears to be in part independent of ontogenetic change , and part of true intraspecific variation . Intraspecific ... appear on the flanks at the point where the ribs bifurcate . Distinct swellings or tubercles develop mainly during the ...
Page 263
... appear to indicate that the ' adventive ' lobe only really becomes prominent at a stage that coincides with the incision ( Zerschlitzung ) of the other saddles and lobes . This appears to favour the idea that we are here dealing with a ...
... appear to indicate that the ' adventive ' lobe only really becomes prominent at a stage that coincides with the incision ( Zerschlitzung ) of the other saddles and lobes . This appears to favour the idea that we are here dealing with a ...
Page 264
... appears to be based on stratigraphic rather than phylogenetic evidence . Details of this are discussed elsewhere ( p . 361 ) . For the present it is sufficient to say that the distinguishing feature between Engonoceratidae and ...
... appears to be based on stratigraphic rather than phylogenetic evidence . Details of this are discussed elsewhere ( p . 361 ) . For the present it is sufficient to say that the distinguishing feature between Engonoceratidae and ...
Contents
List of species referred to Placenticeratidae | 384 |
Acknowledgements | 391 |
241 | 393 |
Copyright | |
1 other sections not shown
Other editions - View all
Common terms and phrases
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