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Genus Discinisca Dall, 1871 |
| [Type-species = Orbicula lamellosa Broderip, 1833] |
| Shell dorsibiconvex to convexoconcave, subcircular; ornamentation of fine growth lines that may become lamellose peripherally, with or without fine ribs; ventral valve with large depressed area around pedicle track, internally with small triangular median septum extending posteriorly from apex on to listrium; lophophore spirolophous. |
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?Triassic, Lower Jurassic - Present
Diagnosis modified, from volume 2 of the
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| Extant Species of Discinisca |
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