Microtomentum
Guides
Nostima
Nostima is a genus of shore flies (family Ephydridae) established by Coquillett in 1900. These are minute flies measuring 0.72–1.72 mm in body length, characterized by distinctive microtomentum patterns on the body and wings. The genus contains 11 described species distributed across the Holarctic region, with larvae occupying semiaquatic habitats where they feed on blue-green algae.