Annals of the South African Museum, Volume 83The Museum, 1981 - Natual history |
From inside the book
Results 1-3 of 30
Page 159
... venter of mature individuals , the ribs are broadest across the venter as well as being asymmetrical with a gentle adapical slope and a steep adoral slope . Rib density varies between 4 and 7 in a distance equal to twice the costal ...
... venter of mature individuals , the ribs are broadest across the venter as well as being asymmetrical with a gentle adapical slope and a steep adoral slope . Rib density varies between 4 and 7 in a distance equal to twice the costal ...
Page 192
... venter and depressed , semicircular whorl section . Primary 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 ...
... venter and depressed , semicircular whorl section . Primary 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 ...
Page 245
... venter . Between 18 and 22 prominent umbilical bullae on the final whorl give rise to 4-5 radial to prorsiradiate , fine , flexuous , secondary ribs , occasionally bifurcating or with intercalatories , and with 2-5 intercalated ribs ...
... venter . Between 18 and 22 prominent umbilical bullae on the final whorl give rise to 4-5 radial to prorsiradiate , fine , flexuous , secondary ribs , occasionally bifurcating or with intercalatories , and with 2-5 intercalated ribs ...
Other editions - View all
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