Key to Subfamilies

1. Gonopods of male genitalia with gonocoxites and gonostyli remarkably elongate, more than six times longer than wider; gonocoxites and gonostyli with a longitudinal row of prominent, spiniform setae on their mesial surface (Figure 3.1, Figure 9.2, Figure 10.2, Figure 11.2, Figure 12.2, Figure 14.2, Figure 16.2); wings in fossil species small (up to 4 mm length) (Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, Figure 10.2, Figure 12.2, Figure 14.2) NANNOTANYDERINAE
subfam. nov.
  − Gonopods of male genitalia with gonocoxite shorter, usually about three of four times as long as wide, and broad at base gonocoxites and gonostyli without prominent spiniform setae; wing usually medium or large size (7-20 mm); (Figure 3.2) TANYDERINAE
Osten-Sacken, 1879


Key to Genera

1. Vein Sc longer than half wing length (Figure 16.1); rostrum elongated (Figure 15), longer than the combined length of head and thorax. Peringueyomyina
Alexander, 1921
  - Vein Sc reaching half wing length or shorter; head without developed rostrum 2
2. Vein R2 short, several times shorter than length of vein R2+3; vein Sc ending opposite or very close to fork of vein Rs into R2 and R3; at rest, gonopods about 3/4 abdomen length; (Figure 4Figure 5Figure 6Figure 7Figure 8Figure 10) Nannotanyderus
Ansorge, 1994
  - Vein R2 evidently longer than R2+3; vein Sc ending before fork of R 2+3 into R2 and R3; gonopods shorter than 3/4 abdomen length 3
3. Vein Sc ending almost opposite one third length of R 2+3; vein R2 about twice as long as Rs; aedegal complex conspicuous; (Figure 13, Figure 14) Coramus
gen. nov.
  - Vein Sc ending opposite two third length of Rs; vein R2 about one fifth length of Rs; complex inconspicuous (Figure 12) Dacochile
Poinar and Brown, 2004