Annals of the South African Museum, Volume 73The Museum, 1977 - Natual history |
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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 318
... ribs , slightly prorsiradiate and separated by interspaces of similar width . At this stage there are approximately six ribs in a distance equal to the whorl diameter . At a slightly larger diameter the ribs become increasingly ...
... ribs , slightly prorsiradiate and separated by interspaces of similar width . At this stage there are approximately six ribs in a distance equal to the whorl diameter . At a slightly larger diameter the ribs become increasingly ...
Page 341
... ribs along the siphonal line , creating a ' paternoster ' effect . Discussion The distinct ventral tuberculation and ... ribs , each bearing weak ventral and lateral tubercles . On the outer whorl the ribs are stronger , prominently ...
... ribs along the siphonal line , creating a ' paternoster ' effect . Discussion The distinct ventral tuberculation and ... ribs , each bearing weak ventral and lateral tubercles . On the outer whorl the ribs are stronger , prominently ...
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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