Annals of the South African Museum, Volume 73The Museum, 1977 - Natual history |
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Page 219
... Ancyloceras ( Ancyloceras ) d'Orbigny , 1842 Ancyloceras in which trituberculate ribs are present throughout ontogeny . Discussion The genus Ancyloceras has become a receptacle for many heteromorphs showing ancyloceratid coiling , and ...
... Ancyloceras ( Ancyloceras ) d'Orbigny , 1842 Ancyloceras in which trituberculate ribs are present throughout ontogeny . Discussion The genus Ancyloceras has become a receptacle for many heteromorphs showing ancyloceratid coiling , and ...
Page 221
... Ancyloceras is always planispiral , and is a feature ( amongst others ) , which serves to distinguish Ancyloceras from Aniso- ceras . Unfortunately our material does not permit a more detailed investigation to determine whether coiling ...
... Ancyloceras is always planispiral , and is a feature ( amongst others ) , which serves to distinguish Ancyloceras from Aniso- ceras . Unfortunately our material does not permit a more detailed investigation to determine whether coiling ...
Page 223
... Ancyloceras by Thomel ( 1964 : 55 ) with Ancyloceras adouli Astier , 1851 as type species . The holotype , BMNH C73806 , reposited in the British Museum ( Natural History ) , is here illustrated as Figures 3-4 . Thomel's original ...
... Ancyloceras by Thomel ( 1964 : 55 ) with Ancyloceras adouli Astier , 1851 as type species . The holotype , BMNH C73806 , reposited in the British Museum ( Natural History ) , is here illustrated as Figures 3-4 . Thomel's original ...
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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