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Genus Valdiviathyris Helmcke, 1940 |
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Small, dorsal valve obliquely conical, beak posterocentral, shell very thin; ornament of fine growth lamellae only. Internally two erect median processes project ventrally, brachial protractor muscles attach to posterior of processes; punctae lack a caecum and branch from the internal surface. Ventral valve calcified, thickened around margins. |
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Late Eocene - Present
Diagnosis of Robinson & Lee, 2007, in: Systematics and Biodiversity, 5 (1), 123-131.
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| Species of Valdiviathyris |
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| Depth range: 328-900 m |
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FIGURES : Valdiviathyris |
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