Following recent phylogenetic assessments using DNA data, the aquatic oligochaete family Naididae (=Naidina
Ehrenberg, 1828) is proposed to be treated as a subfamily, Naidinae, within Tubificidae Vejdovský, 1876. [A
complication of this proposal is that the family-group name Naididae is older than Tubificidae, and thus, according
to the International Code of Zoological Nomenclature, should have precedence over the latter; this will be dealt
with in a separate application to the International Commission of Zoological Nomenclature.] Naidinae appears
to be closely related to taxa currently placed in another tubificid subfamily, Rhyacodrilinae, but it is argued that,
while Naidinae is likely to be a natural group, Rhyacodrilinae is most probably not, neither with nor without the
inclusion of the naidines. It is thus predicted that future revisions will involve splitting of Rhyacodrilinae rather
than a drastic change in the circumscription of Naidinae.