Horaismopterinae Sabrosky, 1978

McAlpine, D. K., 2007, The Surge Flies (Diptera: Canacidae: Zaleinae) of Australasia and Notes on Tethinid-Canacid Morphology and Relationships, Records of the Australian Museum 59 (1), pp. 27-64 : 42

Subfamily Horaismopterinae Sabrosky, 1978

Included genera: Horaismoptera Hendel ; Tethinosoma Malloch.

Autapomorphies: antennae widely divergent from bases; antennal segment 2 with seriate short, stout spines or spinescent setulae on medial surface; one to three inclinate fronto-orbital bristles all situated below eclinate frontoorbitals; costa with oblique, incised notch at subcostal break; costa, beyond subcostal break, with well spaced series of anterodorsal and anteroventral spines.

Shared apomorphies: distal section of vein 6 long and distinct (shared with Apetaeninae and, to some extent, with Pelomyiinae ); humeral callus with at least two differentiated bristles (shared with Tethininae ).

Distribution: New Zealand; shores of Indian Ocean; Middle East; Namibia.