†Eucystis Angelin 1878
PaleoDB taxon number: 31031
Synonyms: Austrocystites Brown 1963 (no. 386382), Carpocystites (no. 31026), Palmacystis Haeckel 1896 (no. 386381), Proteocystites Barrande 1887 (no. 377807)
Parent taxon: Sphaeronitidae according to P. A. Jell 2010
Sister taxa: Archaegocystis, Diplosphaeronis, Haplosphaeronis, Paleosphaeronites, Sphaeronites, Tetreucystis
Subtaxa: Eucystis acuminata, Eucystis angelini, Eucystis branagani, Eucystis hibernica, Eucystis langoeyensis, Eucystis pentax, Eucystis quadrangularis, Eucystis raripunctata, Proteocystites flavus, Proteocystites hispanica
Type: Eucystis raripunctata
Ecology: stationary intermediate-level epifaunal suspension feeder