Nervijuncta Marshall, 1896

Cyrtoneura Marshall 1896: 262 . Type-species, Cyrtoneura hudsoni Marshall 1896, by mononotypy. Nervijuncta Marshall 1896: 265 . Type-species, Nervijuncta nigrescens Marshall 1896, by mononotypy. Huttonia Marshall 1896: 267 Type-species, Platyura tridens Hutton 1881, by mononotypy. Arctoneura Hutton 1904: 133 (nomen novum for Cyrtoneura).

Casa Hutton 1904: 133 (nomen novum for Huttonia).

Cycloneura, error for Cyrtoneura . Matile 1989:126.

Diagnosis of Nervijuncta in the Neotropical Region. Antennal segments cylindrical; gonostyli elongate, blade-like, bearing a long row of short spines along inner margin.

In the Neotropical region, Nervijuncta can be promptly differentiated from Rhipidita and Calliceratomyia based on the antenna and the male terminalia. The flagellomeres in Nervijuncta are cylindrical, a plesiomorphic condition in the genus, while both Rhipidita and Calliceratomyia have flattened flagellomeres, in Calliceratomyia pectinate. Also, the gonostyli of Rhipidita are short and more or less laterally compressed, while Calliceratomyia have slightly more elongated gonostyli, but not blade-like. Nervijuncta has in both Neotropical species very long, flat gonostyli, with a long row of inner teeth. In some degree, this is also seen in some Australian species of Nervijuncta and in some Nearctic and Palearctic species of Ditomyia, but definitely not in Calliceratomyia or Rhipidita .