Paradelphomyia Alexander, 1936a

Podenas, Sigitas, Park, Sun-Jae, Byun, Hye-Woo, Kim, A-Young, Klein, Terry A. & Aukštikalnienė, Heung-Chul Kim and Rasa, 2020, New data on Limoniinae and Limnophilinae crane flies (Diptera: Limoniidae) of Korea, Journal of Species Research 9 (4), pp. 492-531 : 524-525

Paradelphomyia Alexander, 1936a

Paradelphomyia Alexander, 1936a: 184 ; 1948: 151; 1965b: 46; Savchenko, 1986: 212; 1989: 57-58; Starý, 2019: 57-58.

Haploneura Meunier, 1899: 393 (nec. Alexander, 1931: 90).

Gonomyiella Kuntze, 1919: 141 (praeocc. Meunier, 1899).

Type species: Adelphomyia (Paradelphomyia) crossospila Alexander, 1936a ( China: Sichuan) .

Medium-sized crane flies with body length 6.0-8.0 mm and wing length 6.0- 7.5 mm. Coloration varies from yellow to dark brown or black.

Head: Widely rounded posteriorly. Antenna with 14-segmented flagellum. Three basal flagellomeres slightly dilated ventrally, remaining flagellomeres elongate. Verticils variable, up to 2.5 times as long as respective segment.

Thorax: Pronotum elongate with extended postero-lateral angles. Mesonotal prescutum with indistinct tubercular pits far from frontal margin of sclerite. Katepisternum usually bare, sometimes with few small setae. Meron small. Wing usually medium-wide, like in most Limnophilinae , but some species have wing strongly widened posteriorly, usually patternless, but some species with darkenings surrounding cross-veins and distal parts of longitudinal veins, rarely whole wing spotted. Arculus present, vein Sc long, reaching wing margin close to branching point of Rs, sc-r up to four times its own length before tip of Sc. R 1 elongate, R 2 missing in some species, long distance before apex of R 1 in other. Radial sector long and arched, cell r 3 long with short stem, widening towards wing margin. Cell m 1 very short, at least twice as short as its stem, just as exception missing. Discal cell always present, usually elongate. Cross-vein m-cu at middle of discal cell. Anal vein reaching wing margin at approximately same level as base of Rs. Anal angle long and narrow. Distal wing cells always with macrotrichiae. Wing squama setoseless. All legs with small single tibial spur each, some species with spurs missing (like in subfamily Chioneinae ).

Abdomen: Male terminalia approximately as wide as rest abdominal segments. Ninth tergite and sternite fused into complete genital ring, tergite split medially into two separate plates, sternite with large medial lobe at posterior margin. Gonocoxite simple: elongate with no additional lobes. Two pairs of terminal or subterminal gonostyli. Outer gonostylus sclerotized with 2-3 apical teeth or spines, inner gonostylus fleshy and setose. Aedeagus short and straight, one pair of elongate parameres. Ovipositor with long and narrow cerci and hypovalvae, distal part of cercus slightly raised upwards.

A total of 81 species of Paradelphomyia are known worldwide ( Oosterbroek, 2020). They are recorded in all biogeographical regions except the Australian Region; the highest diversity is observed in the Oriental Region with 30 species and the East Palearctic Region with 11 species.