Annals of the South African Museum, Volume 73The Museum, 1977 - Natual history |
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Page 241
... ribs only , separated by wider interspaces . Average rib density is about sixteen to eighteen per dorso - ventral diameter . On the distal half to third of the shaft , stronger ribs start appearing on the flanks , bearing umbilical and ...
... ribs only , separated by wider interspaces . Average rib density is about sixteen to eighteen per dorso - ventral diameter . On the distal half to third of the shaft , stronger ribs start appearing on the flanks , bearing umbilical and ...
Page 295
... ribs and non - tuberculate intermediaries . The tuberculate ribs are much stronger than the intermediaries , being about twice as wide . The ventral tubercles are largest , and situated a little distance from the siphonal line . The ...
... ribs and non - tuberculate intermediaries . The tuberculate ribs are much stronger than the intermediaries , being about twice as wide . The ventral tubercles are largest , and situated a little distance from the siphonal line . The ...
Page 340
... ribs per half whorl connect the species and may be referred to either . The presence of tubercles on the body ... ribs , separated by interspaces of similar width , each bearing a pair of ventral tubercles . At a diameter of ...
... ribs per half whorl connect the species and may be referred to either . The presence of tubercles on the body ... ribs , separated by interspaces of similar width , each bearing a pair of ventral tubercles . At a diameter of ...
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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