| Atopodinium Kahl, 1932. Single species. |
 |
| Mylestoma Kahl, 1928. Several species. |
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| Contents | Classes | Subclasses | Orders | Families |
Family MYLESTOMATIDAE Kahl in Doflein & Reichenow; 1929
| Syns. | Atopodinüdae, Mylestomidae |
Body discoidal, with very sparse somatic ciliation; posterior end either rounded or with four spines (spineless forms have pair of conspicuous cirri there); macronucleus single; like preceding groups, predominantly in polysaprobic fresh-water habitats (but a few Mylestoma are marine).
| Atopodinium Kahl, 1932. Single species. |
|
| Mylestoma Kahl, 1928. Several species. |
|