Corbitella polyacantha Kou, Gong & Li 2018

A) choanosomal stauractin; (B, C) atrial pentactins; (D) dermal hexactin; (E) discostauractin; (F) hemi-discohexaster; (G) microhexactin; (H) floricome I; (I) onychohexaster; (J) floricome II; (K) discaster; (L) detail of primary rays of floricome I; (M) detail of primary rays of onychohexaster; (N) regular hexaster; (O) detail of second ray of floricome II; (P) detail of primary rosette of graphiocome; (Q) anchorate discohexaster.