Annals of the South African Museum, Volume 83The Museum, 1981 - Natual history |
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Page 192
... ribs rursiradiate , terminating in 17-25 bullae at the umbilical shoulder from which arise bundles of 3-4 secondaries , with 1-2 intercalatories between bundles . There are 40-50 secondary ribs per half whorl . Parabolae absent at all ...
... ribs rursiradiate , terminating in 17-25 bullae at the umbilical shoulder from which arise bundles of 3-4 secondaries , with 1-2 intercalatories between bundles . There are 40-50 secondary ribs per half whorl . Parabolae absent at all ...
Page 207
... ribs per whorl which terminate in rather prominent bullae at the umbilical shoulder . From these arise bundles of 3-4 rather coarse , prorsiradiate secondaries with intercalated ribs between bundles . The secondary ribs are about as ...
... ribs per whorl which terminate in rather prominent bullae at the umbilical shoulder . From these arise bundles of 3-4 rather coarse , prorsiradiate secondaries with intercalated ribs between bundles . The secondary ribs are about as ...
Page 333
... ribs between bundles and parabolae are apparently lacking . This species is very close to O. astierianus from which it seems to differ only in possessing bullate umbilical tubercles and in the frequent bifurcation of the secondary ribs ...
... ribs between bundles and parabolae are apparently lacking . This species is very close to O. astierianus from which it seems to differ only in possessing bullate umbilical tubercles and in the frequent bifurcation of the secondary ribs ...
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Common terms and phrases
abbreviations adoral portion Africa Ammonites Amphipoda Astieria atherstoni Sharpe Barnard Baumberger Besairie bicuspidata bifurcate Bochianites body chamber Böse Broom Cantu Chapa Cape Province Cape Town carapace Cistecephalus Collignon compressed Coxa Crustacea d'Orbigny Decapoda densicostatus dentary diameter Dicynodon Diictodon dimorphism distal Distoloceras dorsal fauna figured final whorl forms genera genus growth stages Hauterivian holotype Imlay inflated inner whorls intercalated ribs Kingoria lateral views lectotype macroconch male margin material Maxilla Maxilliped Olcostephanus Olcostephanus Oudenodon outer whorl parabolae Paramelita paratypes Peponocephala Pereopod peristome posterior primary ribs prominent prorsiradiate secondaries ribs between bundles Riccardi RMT RMT Rogersites rursiradiate primaries secondary ribs segment setae Skull slightly South African Museum Spath species spines Subastieria SUID-AFRIKAANSE MUSEUM Sundays River Sundays River Formation synonym Taraises Formation terminate Thieuloy Type specimen Uitenhage umbilical bullae umbilical seam umbilical shoulder umbilical tubercles umbilical walls umbilicus Upper Valanginian uropod Valanginian Vema venter ventral views whorl section