Annals of the South African Museum, Volume 83The Museum, 1981 - Natual history |
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Page 181
... peristome is preserved as recrystallized test . In this microconch the peristome comprises a deep , slightly flexuous constriction , bordered adapically and adorally by prominent parabolic ribs . The adapical rib is prominently flared ...
... peristome is preserved as recrystallized test . In this microconch the peristome comprises a deep , slightly flexuous constriction , bordered adapically and adorally by prominent parabolic ribs . The adapical rib is prominently flared ...
Page 192
... Peristome simple . Description Microconch ( 3 ) : the shell is rather small , with lappets present at diameters from 60-100 mm , and comprises somewhat inflated to rather compressed cadicones , involute up to the umbilical bullae so ...
... Peristome simple . Description Microconch ( 3 ) : the shell is rather small , with lappets present at diameters from 60-100 mm , and comprises somewhat inflated to rather compressed cadicones , involute up to the umbilical bullae so ...
Page 307
... Peristome simple . Description Only macroconchs of this species have been described , and until the ontogenetic variation is known it is highly unlikely that the microconch dimorphs will be recognized . The shell is a large , compressed ...
... Peristome simple . Description Only macroconchs of this species have been described , and until the ontogenetic variation is known it is highly unlikely that the microconch dimorphs will be recognized . The shell is a large , compressed ...
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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