Sphaeronitida - Sphaeronitidae

Alternative combination: Archaegocystis granulata

Belongs to Archegocystis according to P.M. Novack-Gottshall 2025

See also Bockelie 1984

Sister taxon: Archegocystis desideratus

Ecology: stationary epifaunal suspension feeder

Distribution: found only at Frognøya, Sørbakken Fm (Ordovician of Norway)

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Specimen images are retrieved through the ePANDDA API.