Annals of the South African MuseumThe Museum, 1991 - Natural history |
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Page 7
... designation herein , the original of the specimen figured by Neumayr ( in Holub & Neumayr 1881 , pl . 2 ( fig . 3 ) ) . Material A total of 22 specimens were examined : SAM - 4646 , D1876 ( 2 specimens ) , D1881-82 , D1893 ( 9 specimens ) ...
... designation herein , the original of the specimen figured by Neumayr ( in Holub & Neumayr 1881 , pl . 2 ( fig . 3 ) ) . Material A total of 22 specimens were examined : SAM - 4646 , D1876 ( 2 specimens ) , D1881-82 , D1893 ( 9 specimens ) ...
Page 12
... designation of Crickmay ( 1932 ) . Diagnosis Escutcheon smooth ; area relatively broad , with or without nodes demar- cating the longitudinal furrow ; marginal carina persisting to maturity ; flank costae evenly curved , nodes ...
... designation of Crickmay ( 1932 ) . Diagnosis Escutcheon smooth ; area relatively broad , with or without nodes demar- cating the longitudinal furrow ; marginal carina persisting to maturity ; flank costae evenly curved , nodes ...
Page 33
... , 1965 : 17 . ? Megatrigonia rogersi ( Kitchin ) Reyes , 1970 : 8 , pl . 1 ( figs 1–2 ) , pl . 3 ( fig . 1 ) . Type By lectotype designation herein , the original of the LOWER CRETACEOUS TRIGONIOIDA FROM THE ALGOA BASIN 33.
... , 1965 : 17 . ? Megatrigonia rogersi ( Kitchin ) Reyes , 1970 : 8 , pl . 1 ( figs 1–2 ) , pl . 3 ( fig . 1 ) . Type By lectotype designation herein , the original of the LOWER CRETACEOUS TRIGONIOIDA FROM THE ALGOA BASIN 33.
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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