Annals of the South African Museum |
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Page 5
... flank costae concentric , radial ornament to area subordinate to transverse ornament , hinge myophorian ; 2 = hinge trigonian , area with radial ornament , at least in nepionic stages ; 3 shell ovate , marginal carina obsolete ...
... flank costae concentric , radial ornament to area subordinate to transverse ornament , hinge myophorian ; 2 = hinge trigonian , area with radial ornament , at least in nepionic stages ; 3 shell ovate , marginal carina obsolete ...
Page 6
... its steeply inclined , shallowly excavate escutcheon with faint radial costellae , its broad area that is wider than the flank , and in having pustulose flank costae that terminate posteriorly in a low node at the smooth antecarinal ...
... its steeply inclined , shallowly excavate escutcheon with faint radial costellae , its broad area that is wider than the flank , and in having pustulose flank costae that terminate posteriorly in a low node at the smooth antecarinal ...
Page 7
Diagnosis Escutcheon with radial ornament ; flank costae terminating at the antecarinal sulcus or marginal carina . Discussion Neuquenitrigonia Leanza & Garate ( 1987 ) has transverse costellae to the escutcheon , whereas Guineana ...
Diagnosis Escutcheon with radial ornament ; flank costae terminating at the antecarinal sulcus or marginal carina . Discussion Neuquenitrigonia Leanza & Garate ( 1987 ) has transverse costellae to the escutcheon , whereas Guineana ...
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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 |