Note "Diagnosis: Shell small, up to 7 mm long, with smooth valves. Anterior commissure rectimarginate to unisulcate. Foramen permesothyrid with narrrow, disjunct deltidial plates. Pedicle collar strongly developed. Dorsal valve with very tall, blade-like septum with a cockscomb outline in lateral profile. Ventral edge of septum with regular protuberances. Posterior side of septum lamellar bifurcate. Wide ridges developed along the ventral lateral parts of the septum. Cardinal process absent. Crura absent. Strong crural plates clearly developed. Lophophore schizolophe without spicules." for taxon Simplicithyris kurilensis Zezina, 1976 has been added by Tristan Verhoeff via the webinterface on 2024-05-14T09:04:32+00:00
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