| Plagiopyliella Poljansky, 1951. Single species. |
|
| Thyrophylax Berger in Corliss, 1961. Single species. |
 |
| Contents | Classes | Subclasses | Orders | Suborders | Families |
Family THYROPHYLACIDAE Berger in Corliss, 1961
| Syn. | Thyrophylaxidae |
Large, ovoid, laterally compressed body, heavily ciliated, with minute caudal projection and prominent anterodorsal suture; large, deep buccal cavity, with somatic(?) kineties on right wall and somewhat reduced buccal ciliature (though membranelle number 2 large); numerous micronuclei, and even more contractile vacuole pores; carnivorous endocommensals of echinoids.
| Plagiopyliella Poljansky, 1951. Single species. |
|
| Thyrophylax Berger in Corliss, 1961. Single species. |
|