FIGURE 5 in New Eocene species of the crinoid genera Holopus and Cyathidium (Cyrtocrinida: Holopodidae) from north-eastern Italy

FIGURE 5. Holopus alidis (MNHN-IE-2013-10012). A: distal view of IBrax; B: adoral distal view of IIBr1; C–H: keystone plate (IIBr4) ending proximal brachial series (e.g., see arrow head in Fig. 4D), C: outer proximal side view (proximal muscular synarthial articulation to IIBr3 at left), D: close-up of lateral crenulation, E: proximal muscular synarthry, F: proximal adoral view, G: oblique distal lateral view, H: distal muscular synarthry (articulation to distal brachial series) at opposite side of external surface; arrow: adoral process, arrow heads: location of external triangular surface shown in C; d: distal tip of the keystone plate; *: pinnule insertion. Scale bars: 0.5 mm in D, 1.0 mm in all others.