Annals of the South African Museum, Volume 83The Museum, 1981 - Natual history |
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Page 211
... densicostatus 50 = 5 = 12 10 13 14 O.atherstoni 100 Diameter = Fig . 55. Plot of rib density versus diameter for microconchs of O. atherstoni and the O. densicostatus plexus . 1 = O. salinarius var . crassa Spath , 2 O. midas ( Leanza ) ...
... densicostatus 50 = 5 = 12 10 13 14 O.atherstoni 100 Diameter = Fig . 55. Plot of rib density versus diameter for microconchs of O. atherstoni and the O. densicostatus plexus . 1 = O. salinarius var . crassa Spath , 2 O. midas ( Leanza ) ...
Page 216
... densicostatus . The holotype of O. salinarius Spath ( Fig . 60 ) is a microconch , somewhat inflated and with a rather wide umbilicus . Rursiradiate primaries terminate in 20-24 umbilical bullae from which arise bundles of 4-5 fine ...
... densicostatus . The holotype of O. salinarius Spath ( Fig . 60 ) is a microconch , somewhat inflated and with a rather wide umbilicus . Rursiradiate primaries terminate in 20-24 umbilical bullae from which arise bundles of 4-5 fine ...
Page 219
... densicostatus but frequent trifurcation of the secondary ribs suggests it is better referred to the genus Spiticeras . Olcostephanus busnardoi ( Collignon 1962 ) is based upon what appears to be a microconch showing a wide , deep ...
... densicostatus but frequent trifurcation of the secondary ribs suggests it is better referred to the genus Spiticeras . Olcostephanus busnardoi ( Collignon 1962 ) is based upon what appears to be a microconch showing a wide , deep ...
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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