Rhynchonellata - Orthida

Parent taxon: Orthidina according to A. W. Owen and D. A. T. Harper 1982

See also Mitchell 1977

Sister taxa: Enteletacea, Orthoidea, Plectorthoidea, Protorthacea, Yeosinella

Subtaxa: Oxopleciidae Triplesidae

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Ecology: stationary epifaunal suspension feeder

Distribution: found only at Plicocyrtia Community, Prague Basin (Silurian of Czech Republic)

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