Annals of the South African Museum, Volume 7South African Museum, 1913 - Natual history |
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Page 27
... costate Trigonia ( T. tatei Neum . ) alone exhibited a marked Jurassic character . On the other hand , he considered a number of forms to represent essentially Cretaceous types . Such were Holcostephanus atherstoni ( Sharpe ) ...
... costate Trigonia ( T. tatei Neum . ) alone exhibited a marked Jurassic character . On the other hand , he considered a number of forms to represent essentially Cretaceous types . Such were Holcostephanus atherstoni ( Sharpe ) ...
Page 32
... costate Trigonia , and was accordingly renamed T. tatei by Neumayr . It is well distinguished by the elongated escutcheon , the very delicate marginal carina , and the fine character of the ornamentation on the area and escutcheon ...
... costate Trigonia , and was accordingly renamed T. tatei by Neumayr . It is well distinguished by the elongated escutcheon , the very delicate marginal carina , and the fine character of the ornamentation on the area and escutcheon ...
Page 34
... costate form , T. anguste- costata Behr . † occurs in the Argentine Republic in strata which are regarded by Behrendsen as Upper Cretaceous , while a typical member of this section has been described by E. Ascher from the Grodischter ...
... costate form , T. anguste- costata Behr . † occurs in the Argentine Republic in strata which are regarded by Behrendsen as Upper Cretaceous , while a typical member of this section has been described by E. Ascher from the Grodischter ...
Page 40
... costate form , has not been recorded from any of the localities where T. ventricosa is found , it occurs in beds at least not older than those from which the remaining Oomia Trigonia have been obtained . In the Uitenhage Series we have ...
... costate form , has not been recorded from any of the localities where T. ventricosa is found , it occurs in beds at least not older than those from which the remaining Oomia Trigonia have been obtained . In the Uitenhage Series we have ...
Page 44
... costate stock . Judged by analogy with Trigonia retrorsa , which can only be regarded as a degenerate costate type , the relationship of T. spissicostata to the Gibbosæ is extremely doubtful , but nothing more definite on this point can ...
... costate stock . Judged by analogy with Trigonia retrorsa , which can only be regarded as a degenerate costate type , the relationship of T. spissicostata to the Gibbosæ is extremely doubtful , but nothing more definite on this point can ...
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Common terms and phrases
adult Ammonites angle aperture Aptian Astarte atherstoni Sharpe baini bank of Sunday's bone Broom carinal characters closely Coega collection comparison conocardiiformis convex costate curved Cutch Cynodonts d'Orbigny delicate developed Dicynodon dorsal elongated Eriphyla escutcheon Exogyra fauna figure flank flattened fossils frontal genus Geol Geological German East Africa Graaff-Reinet Gryponyx Hauterivian height herzogi Holcostephanus holubi imbricata Jurassic keel Krauss left valve length less Lower Cretaceous Lycett margin Massospondylus narrow Neocomian Neumayr occurs Oolitic Oomia beds ornamentation outline Pareiasaurus Pavlow Pecten Plate posterior posteriorly preserved represented resemblance ribs ridges right valve Rogers and Schwarz rogersi sculpture shell similar slightly South African Museum species specimen spiral stage Stoliczka stowi strata striæ Sunday's River surface suture Tate Tate's transverse Trigonia Trigonia ventricosa tubercles Uhlig Uitenhage Uitenhage beds Uitenhage Series umbilical umbo umbonal region upper W. T. Blanford whorl zoarium Zwartkop's River