Annals of the South African Museum |
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Page 3
Character states : 1 = prominent marginal carina , myophorian hinge , radial ornament to area subordinate to transverse ornament ; 2 = hinge trigonian , radial ornament to area predominant ; 3 marginal carina relatively fine , nodate ...
Character states : 1 = prominent marginal carina , myophorian hinge , radial ornament to area subordinate to transverse ornament ; 2 = hinge trigonian , radial ornament to area predominant ; 3 marginal carina relatively fine , nodate ...
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area broad , typically with transverse ornament and longitudinal groove often marked by row of nodes ; respiratory margin generally broadly truncate ; escutcheon smooth , nodate , or with transverse ornament ; flank ribs primitively ...
area broad , typically with transverse ornament and longitudinal groove often marked by row of nodes ; respiratory margin generally broadly truncate ; escutcheon smooth , nodate , or with transverse ornament ; flank ribs primitively ...
Page 11
... but have the myophorelline synapomorphies of nodate marginal and escutcheon carinae , smooth escutcheon and transversely ornamented area , whereas the ribs in some , e.g. Jaworskiella , show a tendency to become nodate .
... but have the myophorelline synapomorphies of nodate marginal and escutcheon carinae , smooth escutcheon and transversely ornamented area , whereas the ribs in some , e.g. Jaworskiella , show a tendency to become nodate .
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Common terms and phrases
angles anterior anteroventrally appearance beaks become broad coarse commissure comprises concave concentric conocardiiformis Krauss convex Cooper crenulated Cretaceous crowded curved Description designation Diagnosis differs Discussion dorsal elongate escutcheon face faunas figured fine finely flank costae follow Formation genus Goldfuss growth rugae herzogi Hoepen holotype holubi Kitchin included interspaces Iotrigonia irregular Kitchin Kobayashi lanceolate Lateral view left valve marginal carina material maturity meet Megatrigonia moderately Myophorella Nakano narrow Neocomian nepionic stages nodate nodes Note oblique obsolete Occurrence opisthogyrous original ornament persists Pisotrigonia Port Elizabeth Museum posterior posteriorly primitive Pringle produced prominent Pterotrigonia radial references region relatively respiratory margin restricted Reyes ribs rounded rows separates Sharpe shell shoulder similar Skwarko slightly smooth South African Museum species specimens Steinmanella straight strongly subconcentric subfamily Superfamily Tashiro transverse transverse costellae trigonally Trigonia Trigoniinae tubercles Type umbones Upper Valanginian valve ventral margin weakly
Bibliographic information
| Title | Annals of the South African Museum Annals of the South African Museum, South African Museum Volume 100 of Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum, South African Museum |
| Author | South African Museum |
| Publisher | The Museum, 1991 |
| Original from | the University of California |
| Digitized | 21 Jul 2016 |
| ISBN | 0868131180, 9780868131184 |
| Export Citation | BiBTeX EndNote RefMan |