Annals of the South African Museum, Volume 73The Museum, 1977 - Natual history |
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Page 25
... margin . In most hydrothecae the marginal teeth are equally developed and the margin is perpendicular to the axis ( a perpendicular dropped through centre of margin passes through basal thickening of adcauline wall ) , but in some the ...
... margin . In most hydrothecae the marginal teeth are equally developed and the margin is perpendicular to the axis ( a perpendicular dropped through centre of margin passes through basal thickening of adcauline wall ) , but in some the ...
Page 127
... margin . Hydrotheca sigmoidally curved ; abcauline wall very strongly convex immediately above base , strongly concave above this and with the maximum concavity at about half height , then widening to margin ; base carried forwards with ...
... margin . Hydrotheca sigmoidally curved ; abcauline wall very strongly convex immediately above base , strongly concave above this and with the maximum concavity at about half height , then widening to margin ; base carried forwards with ...
Page 364
... margin . Terminal segment less than half as long as basal , with two attenuated spines on inner lateral margin . More proximal spine robust and long . Distal margin bears a claw - like attenuated spine and two subterminal setae the ...
... margin . Terminal segment less than half as long as basal , with two attenuated spines on inner lateral margin . More proximal spine robust and long . Distal margin bears a claw - like attenuated spine and two subterminal setae the ...
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Common terms and phrases
abbreviations adcauline adnate Albian Allman Ammonites Ammonoidea Amphipoda Ancyloceras Adouliceras ancyloceratid aperture Aptian Aptian III-IV Australiceras author's name authors Barremian bicuspidata BMNH body chamber cala Campanian Cape Town capensis Casey Cenomanian coiling Collignon constrictions Cretaceous Crioceras crozier described Description distal dorsal dorsum Eoxenopoides reuningi fauna figures flanks fossil Gastropoda genus gonothecae Haughton Helicancyloceras Nonyaniceras Hoepen holotype hydrocladia hydrothecae inner whorls internode Kerguelen Kossmat lateral Lectotype length lobe locality 168 locality 170 Lower Aptian Maastrichtian Madagascar material metres Millard Mozambique mozambiquense nematothecae occur ornament paratypes Pedicel phragmocone pipids Pseudophyllites referred ribs rounded Saghalinites Santonian scientific name segment separated Sertularella seta shaft shoulder Sinzow South African Museum southern Spath species specimen spines Stechow stem subheadings subsimbirskense SUID-AFRIKAANSE MUSEUM suture line Symplectoscyphus Synonymy Tetragonites text-fig Tonohamites Totton Toxoceratoides Tropaeum tubercles umbilical Umzamba Upper Aptian venter ventral Vervoort Wb/Wh whorl section Wiedmann Xenopus Zululand