Annals of the South African MuseumThe Museum, 1991 - Natural history |
From inside the book
Results 1-3 of 4
Page 11
... anteroventrally or joined by intercalatories . Discussion Morphologically the most primitive myophorelline is ... anterior face . Genus Myophorella Bayle , 1878 Type species . Trigonia nodulosa LOWER CRETACEOUS TRIGONIOIDA FROM THE ALGOA ...
... anteroventrally or joined by intercalatories . Discussion Morphologically the most primitive myophorelline is ... anterior face . Genus Myophorella Bayle , 1878 Type species . Trigonia nodulosa LOWER CRETACEOUS TRIGONIOIDA FROM THE ALGOA ...
Page 18
... anteroventrally . C. Lateral view of a frag- mentary left valve from the Mngazana Formation of Transkei , in the South African Museum . D - E . Dorsal and lateral views of a juvenile , PEM - 1208c . growth striae and the median row of ...
... anteroventrally . C. Lateral view of a frag- mentary left valve from the Mngazana Formation of Transkei , in the South African Museum . D - E . Dorsal and lateral views of a juvenile , PEM - 1208c . growth striae and the median row of ...
Page 24
... anterior margins form an acute angle , with terminal umbones and weakly inturned , orthogyrous to slightly ... anteroventrally , with a few tubercles intercalated between rows . Occurrence Steinmanella herzogi ( Goldfuss ) is ...
... anterior margins form an acute angle , with terminal umbones and weakly inturned , orthogyrous to slightly ... anteroventrally , with a few tubercles intercalated between rows . Occurrence Steinmanella herzogi ( Goldfuss ) is ...
Other editions - View all
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