Annals of the South African Museum, Volume 83The Museum, 1981 - Natual history |
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Page 256
... umbilicus and a depressed , almost semicircular whorl section . On the outer whorl , between 27 and 28 primary ribs terminate in weak bullae on the umbilical shoulder and generally give rise to 2 prorsiradiate secondaries , with ...
... umbilicus and a depressed , almost semicircular whorl section . On the outer whorl , between 27 and 28 primary ribs terminate in weak bullae on the umbilical shoulder and generally give rise to 2 prorsiradiate secondaries , with ...
Page 260
... umbilicus . The umbilical shoulders appear evenly rounded and seem to lack umbilical bullae . Simple rectiradiate ribs , about as wide as the interspaces , arise from the umbilical shoulder ( the umbilicus is plugged with matrix ) and ...
... umbilicus . The umbilical shoulders appear evenly rounded and seem to lack umbilical bullae . Simple rectiradiate ribs , about as wide as the interspaces , arise from the umbilical shoulder ( the umbilicus is plugged with matrix ) and ...
Page 285
... umbilicus , and steep umbilical walls . About 18 rursiradiate primaries terminate in small umbilical bullae from which arise bundles of 3-4 prorsiradiate secondaries , with 1-2 intercalated ribs between bundles . The inner whorls bear ...
... umbilicus , and steep umbilical walls . About 18 rursiradiate primaries terminate in small umbilical bullae from which arise bundles of 3-4 prorsiradiate secondaries , with 1-2 intercalated ribs between bundles . The inner whorls bear ...
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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