Annals of the South African Museum, Volume 83The Museum, 1981 - Natual history |
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Page 192
... 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 growth stages . Peristome simple . Description ...
... 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 growth stages . Peristome simple . Description ...
Page 193
... umbilicus , and steep umbilical walls . Well - developed primaries terminate in small but distinct bullae on the umbilical shoulder , from which arise bundles of fine , prorsiradiate secondaries which very occasionally bifurcate at ...
... umbilicus , and steep umbilical walls . Well - developed primaries terminate in small but distinct bullae on the umbilical shoulder , from which arise bundles of fine , prorsiradiate secondaries which very occasionally bifurcate at ...
Page 307
... umbilical shoulder . On the final whorl the primaries become very weak , disappearing entirely on the internal mould , and the tubercles become swollen and rounded , as well as fewer ( 15 ) in number . Flexuous prorsiradiate secondaries ...
... umbilical shoulder . On the final whorl the primaries become very weak , disappearing entirely on the internal mould , and the tubercles become swollen and rounded , as well as fewer ( 15 ) in number . Flexuous prorsiradiate secondaries ...
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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 Rogersites rursiradiate primaries secondary ribs segment setae slightly South African Museum Spath species spines Subastieria Sundays River Sundays River Formation synonym Taraises Formation terminate Thieuloy Type specimen Type specimen Skull Uitenhage umbilical bullae umbilical seam umbilical shoulder umbilical tubercles umbilical walls umbilicus Upper Valanginian uropod Valanginian Vema venter Ventral and lateral ventral views whorl section