Family UROZONIDAE Grolière, 1975

Syn.	Urozonatidae

Very small ovoid body, with single equatorial belt of somatic ciliature plus a single long caudal cilium; deep buccal cavity, but oral organelles greatly reduced in number, size, and complexity; common in polysaprobic fresh-water biotopes.

[Jankowski (1975), independently, proposed the familial name (without diagnosis) earlier in the year 1975 than did Grolière (1975a); but the latter worker provided a characterization and recognized the proper taxonomic location of the organism, so I am crediting the family to him.]

Urozona Schewiakoff, 1889. Single species.