Annals of the South African MuseumThe Museum, 1991 - Natural history |
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Page 2
... material described by Kitchin ( 1908 ) , the early Geological Survey collections , and subsequent collections made by the late E. C. N. van Hoepen and the writer . There are also small collections in the Port Elizabeth Museum , the ...
... material described by Kitchin ( 1908 ) , the early Geological Survey collections , and subsequent collections made by the late E. C. N. van Hoepen and the writer . There are also small collections in the Port Elizabeth Museum , the ...
Page 9
... material from the Lower Aptian of southern Moçambique with this species , but it differs in being slightly more elongate , with a more convex anterior margin , and in having maximum downward convexity of the flank costae more anterior ...
... material from the Lower Aptian of southern Moçambique with this species , but it differs in being slightly more elongate , with a more convex anterior margin , and in having maximum downward convexity of the flank costae more anterior ...
Page 39
South African Museum. Type The whereabouts of Krauss ' ( 1843 ) type material is unknown ; it may be necessary to designate a neotype . Material Hundreds of specimens in the South African Museum , many unnumbered or with the Van Hoepen ...
South African Museum. Type The whereabouts of Krauss ' ( 1843 ) type material is unknown ; it may be necessary to designate a neotype . Material Hundreds of specimens in the South African Museum , many unnumbered or with the Van Hoepen ...
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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