Annals of the South African MuseumThe Museum, 1991 - Natural history |
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Page 15
... Steinmanella itself , which first occurs in Tithonian rocks of South America ( Leanza & Garate 1987 ) . Simply by failure to produce coarse irregular growth rugae across the mature area , Steinmanella gave rise to Yaadia , a ...
... Steinmanella itself , which first occurs in Tithonian rocks of South America ( Leanza & Garate 1987 ) . Simply by failure to produce coarse irregular growth rugae across the mature area , Steinmanella gave rise to Yaadia , a ...
Page 16
... Steinmanella holubi ( Kitchin ) Crickmay , 1930 : 50. 1932 : 458. Cox , 1969 : N487 , fig . D74.6 . Levy , 1969 : 66 ... ( Steinmanella ) holubi Kitchin . Rennie , 1936 : 346 . Yaadia holubi ( Kitchin ) Cox , 1952 : 57. Pringle , 1960 : 89 ...
... Steinmanella holubi ( Kitchin ) Crickmay , 1930 : 50. 1932 : 458. Cox , 1969 : N487 , fig . D74.6 . Levy , 1969 : 66 ... ( Steinmanella ) holubi Kitchin . Rennie , 1936 : 346 . Yaadia holubi ( Kitchin ) Cox , 1952 : 57. Pringle , 1960 : 89 ...
Page 19
... Steinmanella holubi ( Kitchin ) is endemic to the Upper Valanginian of south - east Africa . It abounds in the more argillaceous units of the Sundays . River Formation and also occurs in the Mngazana Formation of Transkei ( Cooper 1983 ) ...
... Steinmanella holubi ( Kitchin ) is endemic to the Upper Valanginian of south - east Africa . It abounds in the more argillaceous units of the Sundays . River Formation and also occurs in the Mngazana Formation of Transkei ( Cooper 1983 ) ...
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Common terms and phrases
Algoa Basin Anditrigonia antecarinal sulcus anterior commissure anterolateral shoulder anteroventrally Apiotrigoniinae Bivalvia broad chevrons coarse commissure comprises convex Cooper Cretaceous Description Shell Diagnosis elongate escutcheon carina faunas finely crenulated flank costae flank ornament genus growth rugae growth striae Hauterivian Hoepen holotype inflated anteriorly interspaces Iotrigonia irregular Kobayashi kraussi Kitchin lanceolate large maximum length Lateral view lectotype left valve longitudinal groove Megatrigoniacea moderately Myophorella Myophoriidae Nakano neotype nepionic stages Neumayr nodate Nototrigoniinae opisthogyrous beaks Paranditrigonia paratypes persisting to maturity phyletic Port Elizabeth Museum posterior set posterodorsal margin Poulton Pterotrigonia radial costellae radial ornament Rennie respiratory margin Reyes ribs right valve rostrate shallowly concave shell length Skwarko smooth South African Museum Steinmanella herzogi Goldfuss straight strongly oblique subconcentric subfamily Sundays River Superfamily synonymy Tashiro Tithonian transverse costellae transverse ornament Trigonia Trigoniacea Trigoniinae trigonioid tubercles Type species Upper Valanginian V-shaped Valanginian vau Sharpe ventral margin ventricosa Krauss Yaadia