Annals of the South African MuseumThe Museum, 1991 - Natural history |
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Page 12
... type of Clavotrigonia ( of which Clavitrigonia Leanza , 1942 , is a junior objective synonym ) than they are to the type of Myophorella s.s. The subgenus M. ( Clavotrigonia ) is here applied to this predominantly Tethyan group ...
... type of Clavotrigonia ( of which Clavitrigonia Leanza , 1942 , is a junior objective synonym ) than they are to the type of Myophorella s.s. The subgenus M. ( Clavotrigonia ) is here applied to this predominantly Tethyan group ...
Page 27
... Type species . Megatrigonia obesa van Hoepen , 1929 ; by original desig- nation . Diagnosis Very large , robust ... Type The whereabouts of Krauss ' ( 1843 ) type LOWER CRETACEOUS TRIGONIOIDA FROM THE ALGOA BASIN 27.
... Type species . Megatrigonia obesa van Hoepen , 1929 ; by original desig- nation . Diagnosis Very large , robust ... Type The whereabouts of Krauss ' ( 1843 ) type LOWER CRETACEOUS TRIGONIOIDA FROM THE ALGOA BASIN 27.
Page 29
South African Museum. Type The whereabouts of Krauss ' ( 1843 ) type material is unknown ; it may be necessary to designate a neotype . Material A total of 75 specimens were available for study , 70 in the South African Museum , SAM ...
South African Museum. Type The whereabouts of Krauss ' ( 1843 ) type material is unknown ; it may be necessary to designate a neotype . Material A total of 75 specimens were available for study , 70 in the South African Museum , SAM ...
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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