Annals of the South African MuseumThe Museum, 1991 - Natural history |
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Page 12
... Myophorella it is possible to recognize several subgenera : M. ( Myophorella ) —escutcheon smooth ; flank costae distinctly curved , essen- tially uninterrupted , with prominent nodes . M. ( Promyophorella ) —like Myophorella , but with ...
... Myophorella it is possible to recognize several subgenera : M. ( Myophorella ) —escutcheon smooth ; flank costae distinctly curved , essen- tially uninterrupted , with prominent nodes . M. ( Promyophorella ) —like Myophorella , but with ...
Page 13
... Myophorella first appeared in the Lias and attained a cosmopolitan distri- bution in the later Jurassic , becoming extinct in the Hauterivian . Myophorella oosthuizeni Cooper , 1979 Fig . 5 Myophorella ( Myophorella ) oosthuizeni Cooper ...
... Myophorella first appeared in the Lias and attained a cosmopolitan distri- bution in the later Jurassic , becoming extinct in the Hauterivian . Myophorella oosthuizeni Cooper , 1979 Fig . 5 Myophorella ( Myophorella ) oosthuizeni Cooper ...
Page 14
... Myophorella oosthuizeni Cooper is known only from the Upper Valangi- nian of south - east Africa , where it is a very rare element of the faunas . Diagnosis Generally very large , massive , trigonally ovate to quadrate and elliptical ...
... Myophorella oosthuizeni Cooper is known only from the Upper Valangi- nian of south - east Africa , where it is a very rare element of the faunas . Diagnosis Generally very large , massive , trigonally ovate to quadrate and elliptical ...
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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