Cheirocystis is an extinct genus of stationary intermediate-level epifaunal suspension feeders
Identification in Hand Sample:
- All plate circlets closed
- Six radial plates
- Ambulacra confined to flat oral surface
- 8-16 disjunct pectinirhombs
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- A genus of Cheirocrinidae with all plate circlets closed, six radial plates; short ambulacra confined to flat oral surface; 8-16 disjunct pectinirhombs. Cheirocystis is proposed for a group of species which have most features identical to Cheirocystella but possess more efficient disjunct pectinirhombs.