Annals of the South African Museum, Volume 73The Museum, 1977 - Natual history |
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Page 171
... becomes flattened , and in some cases concave . Constrictions become increasingly flexed , sweeping forwards over the inner flanks , flexing backwards at mid - flank and developing a broad , shallow but distinct ventral sinus . The ...
... becomes flattened , and in some cases concave . Constrictions become increasingly flexed , sweeping forwards over the inner flanks , flexing backwards at mid - flank and developing a broad , shallow but distinct ventral sinus . The ...
Page 297
... becomes detached . The initial whorl section is suboctagonal , slightly higher than wide , but eventually becomes subrectangular with a rounded venter and a slight dorsal zone of impression ( Fig . 6B ) . At the smallest preserved ...
... becomes detached . The initial whorl section is suboctagonal , slightly higher than wide , but eventually becomes subrectangular with a rounded venter and a slight dorsal zone of impression ( Fig . 6B ) . At the smallest preserved ...
Page 334
... becomes finer and wider - spaced and somewhat rursiradiate . Ribbing over the dorsum is very weak at this stage . Occasional bifurcations occur at the umbilical edge . On the body chamber the whorl section becomes dome - shaped with a ...
... becomes finer and wider - spaced and somewhat rursiradiate . Ribbing over the dorsum is very weak at this stage . Occasional bifurcations occur at the umbilical edge . On the body chamber the whorl section becomes dome - shaped with a ...
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Common terms and phrases
abbreviations adcauline adnate Africa Albian Allman Ammonites Ammonoidea Amphipoda Ancyloceras Adouliceras aperture Aptian Aptian III-IV Australiceras author's name authors Berkeley bicuspidata BMNH body chamber CALIFORNIA LIBRARY Campanian Cape Town capensis Casey coiling Collignon constrictions Cretaceous Crioceras crozier described Description diameter distal dorsal dorsum Eoxenopoides reuningi fauna female figures flanks fossil genus Geol gonothecae Haughton Hoepen holotype hydrocladia hydroids hydrothecae inner whorls internode Kerguelen KLINGER lateral Lectotype length lobe locality 168 Lower Aptian Maastrichtian Madagascar margin material metres Millard Mozambique neglectus nematothecae occur ornament paratypes pedicel phragmocone pipids Pseudophyllites referred ribs rounded Saghalinites Santonian scientific name segment separated Sertularella seta shaft Sinzow South African Museum southern Spath species specimen spines Stechow stem subsimbirskense SUID-AFRIKAANSE MUSEUM Symplectoscyphus Synonymy Tetragonites text-fig Therocephalia Tonohamites Totton Toxoceratoides Tropaeum tubercles umbilical Umzamba UNIVERSITY OF CALIFORNIA Upper Aptian venter ventral Vervoort whorl section Wiedmann Xenopus Zool Zululand