Annals of the South African Museum |
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Page 1
The late Valanginian trigonias of the Sundays River Formation , last reviewed as a group in 1908 , are revised and shown to comprise 11 species in seven genera ( Trigonia , Myophorella , Steinmanella , Iotrigonia , Megatrigonia ...
The late Valanginian trigonias of the Sundays River Formation , last reviewed as a group in 1908 , are revised and shown to comprise 11 species in seven genera ( Trigonia , Myophorella , Steinmanella , Iotrigonia , Megatrigonia ...
Page 4
The superfamily comprises the following taxa : Schizodidae ( Schizodinae and Eoschizodinae ) , Scaphellinidae , Myophoriidae , Pachycardiidae ( Pachycardiinae and Eoastartinae ) , and Minetrigoniidae ( including Costatoriidae ) .
The superfamily comprises the following taxa : Schizodidae ( Schizodinae and Eoschizodinae ) , Scaphellinidae , Myophoriidae , Pachycardiidae ( Pachycardiinae and Eoastartinae ) , and Minetrigoniidae ( including Costatoriidae ) .
Page 10
Discussion This superfamily comprises the families Frenguelliellidae ( Frenguelliellinae and Laevitrigoniinae ) with subconcentric , more or less entire , flank costation , Myophorellidae ( Myophorellinae and Steinmanellinae subfam ...
Discussion This superfamily comprises the families Frenguelliellidae ( Frenguelliellinae and Laevitrigoniinae ) with subconcentric , more or less entire , flank costation , Myophorellidae ( Myophorellinae and Steinmanellinae subfam ...
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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 |