| Polycycla Poljansky, 1951. Few species. |
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| Contents | Classes | Subclasses | Orders | Suborders | Families |
Family POLYCYCLIDAE Poljansky, 1951
Body conical, tapered apically; adoral spiral of ca. 360°, with greatly reduced radius, and buccal ciliature relatively inconspicuous; denticles smoothly but densely linked, numerous (35-55); cortical rings in evidence; some scopulary cilia present, and two trochal bands; macronucleus ribbon-like, with thick "nodes" and L-shaped; endocommensals of holothurian echinoderms.
| Polycycla Poljansky, 1951. Few species. |
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