Annals of the South African Museum, Volume 73The Museum, 1977 - Natual history |
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Page 158
... venter broad and flattened . The shell surface is finely striate . These striae pass straight across the umbilical wall , running normal to the umbilical seam . They sweep forwards across the umbilical shoulder , and are strongly ...
... venter broad and flattened . The shell surface is finely striate . These striae pass straight across the umbilical wall , running normal to the umbilical seam . They sweep forwards across the umbilical shoulder , and are strongly ...
Page 241
... venter than dorsum and weakly inflated flanks . Towards the crozier the dorsum becomes more flattened and the dorso - ventral width increases . In the bend of the crozier and on the descending limb the whorl section is dome - shaped ...
... venter than dorsum and weakly inflated flanks . Towards the crozier the dorsum becomes more flattened and the dorso - ventral width increases . In the bend of the crozier and on the descending limb the whorl section is dome - shaped ...
Page 334
... venter . Interspaces on the flanks are about as wide as the ribs . Ribbing over the venter is very variable . At small diameters the ribs are interrupted or weakened on the venter , in some cases forming small pimple - like tubercles on ...
... venter . Interspaces on the flanks are about as wide as the ribs . Ribbing over the venter is very variable . At small diameters the ribs are interrupted or weakened on the venter , in some cases forming small pimple - like tubercles on ...
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Common terms and phrases
abbreviations adcauline adnate Africa Albian Allman Ammonites Ammonoidea Amphipoda Ancyloceras Adouliceras aperture Aptian Australiceras author's name authors bicuspidata BMNH body chamber cala Cape Town Casey Cenomanian coiling Collignon constrictions Cretaceous Crioceras crozier described Description distal dorsal dorsum Eoxenopoides reuningi fauna figures flanks fossil frogs Gastropoda genus geol gonothecae H. L. Clark Haughton Helicancyloceras Hoepen holotype hydrocladia hydroids hydrothecae indra internode italics Kerguelen Kossmat Late Santonian lateral Lectotype length lobe locality Lower Aptian Maastrichtian material metres Millard Mozambique nematothecae occur ornament paratypes Pedicel phragmocone pipids Pondoland Pseudophyllites references ribs rounded Saghalinites Santonian Santonian to early scientific name segments separated Sertularella shaft shoulder Sinzow South African Museum southern Spath species specimens spines Stechow stem subheadings subtimotheanus SUID-AFRIKAANSE MUSEUM suture Symplectoscyphus Synonymy Tetragonites text-fig Tonohamites Totton Toxoceratoides transverse Tropaeum tubercles Upper Aptian venter ventral vertebrae Vervoort Wb/Wh whorl section Wiedmann Xenopus Zool Zululand Zygophylax