Annals of the South African MuseumThe Museum, 1991 - Natural history |
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Page 15
... Nakano , 1974a , is uncertain . The morphologically similar Quadratotrigoniinae are a convergent , pre- dominantly Tethyan group ; they are phyletically distinct and can be dis- tinguished from the Steinmanellinae nov . by the V ...
... Nakano , 1974a , is uncertain . The morphologically similar Quadratotrigoniinae are a convergent , pre- dominantly Tethyan group ; they are phyletically distinct and can be dis- tinguished from the Steinmanellinae nov . by the V ...
Page 26
... Nakano ( 1971 ) and Tashiro ( 1979 ) consider Trigonia calderoni Castillo & Aguilerae from the Oxfordian - Tithonian of New Mexico and Arizona ( Stoyanow 1949 ; Reyes & Pérez 1982 ) to be the earliest apiotrigoniine . Whereas Skwarko ...
... Nakano ( 1971 ) and Tashiro ( 1979 ) consider Trigonia calderoni Castillo & Aguilerae from the Oxfordian - Tithonian of New Mexico and Arizona ( Stoyanow 1949 ; Reyes & Pérez 1982 ) to be the earliest apiotrigoniine . Whereas Skwarko ...
Page 50
... NAKANO , M. 1961. On the Trigoniinae . Journal of Science of the Hiroshima University ( C , Geology and Mineralogy ) 4 ( 1 ) : 71–94 . NAKANO , M. 1965. On the Megatrigoniinae . Journal of Science of the Hiroshima University ( C ...
... NAKANO , M. 1961. On the Trigoniinae . Journal of Science of the Hiroshima University ( C , Geology and Mineralogy ) 4 ( 1 ) : 71–94 . NAKANO , M. 1965. On the Megatrigoniinae . Journal of Science of the Hiroshima University ( C ...
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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