Family HALTERIIDAE Claparède & Lachmann, 1858

Syn.	Meseridae [for Lieberkuehnidae]

Small, active forms; circle of apical membranelles "open"; somatic ciliature present, though generally reduced to a few bristles; predominantly fresh-water forms, but also a few are edaphic; marine forms poorly known.

[The genera Metastrombidium and Parastrombidium, erected before 1931, are valid despite the highly unusual situation of their containing no named species.]

Cephalotrichium Meunier, 1910. Single species.
Halteria Dujardin, 1841. Several species. Pl. IV, Fig. 20a
Halterioforma Horváth, 1956. Single species [solely edaphic] .
Meseres Schewiakoff, 1893. Few species [holotrichous ciliation] .
Metastrombidium Fauré-Fremiet, 1924. No species.
Parastrombidium Fauré-Fremiet, 1924. No species.
Incertae sedis:
Jeannellia Tucolesco, 1962, single [cavernicolous] species;
Octocirrus Rao, 1928, single species [very inadequately described] ;
Spelaeonecta Jankowski, 1975 (for Faureia Tucolesco, 1962 [hom.] ), several [cavernicolous] species.