Dactylolabis Osten Sacken, 1860

Kato, Daichi, 2023, Taxonomic study of the genus Dactylolabis Osten Sacken, 1860 of Japan (Diptera: Limoniidae), Zootaxa 5375 (2), pp. 227-240 : 228

Dactylolabis Osten Sacken, 1860

Dactylolabis Osten Sacken, 1860: 240 (as subgenus of Limnophila Macquart, 1834 ).

Type species: Limnophila montana Osten Sacken, 1860 (monotypic).

Diagnosis. Head with eye dichoptic. Antenna 16-segmented. Palpus 5-segmented. Thorax with mesonotum bearing no pits. Wing venation: Sc ending near level of fork of Rs; crossvein sc-r situated 1–3 times length of itself proximal to tip of Sc; Rs branching into R 2, R 3, R 4, and R 5, origin of Rs situated near level of middle of M; R 2+3+4 short, 1–4 times length of crossvein r-m; R 2+3 strongly curved near fork of R 2+3+4; R 2 erect, 1–4 times length of apical section of R 1; M 1+2 forked, 0.5–2 times as long as cell m 1; cell dm present; crossvein m-cu situated at base of cell dm or very close to it. Legs with tibial spurs 1 + 2 + 2. Hypopygium not rotated; epandrium and hypandrium fused into continuous ring; proctiger large, lateral margin narrowly sclerotized, posterolateral corner with small lobe, pair of bacilliform sclerites present between these lobes; two pairs of gonostyli present, outer gonostylus fleshy; interbase with medial part fused. Female terminalia with tergites 8 to 10 distinctly separated; cercus broad; hypogynial valve stout, pointed at tip, with swelling at lateral side on basal part, each valve not distinctly separated except on distal part; genital frame roughly spoon-shaped with lateral arm oval, bearing small tubercle at center; two spermathecal ducts present, spermathecae indistinct.