Authors disagree on the
circumscription of this taxon. Published accounts differ. The Anisopodidae are small or medium-sized (mostly 4–12 mm,
Lobogaster found in Chile 17–18 mm) yellowish to brownish gnats with long, thin legs. The tibiae have apical spurs. The head is small and rounded and with small mouthparts. The eyes are dichoptic or holoptic. Ocelli are present and form an equilateral triangle. The slender antennae vary from relatively short to longer than head and thorax together. The antennae have 14-16 segments. The mesonotum is without a transverse suture; the wing is wide, with a clear anal lobe and a pattern of smaller markings (sometimes hyaline). The alula is strongly differentiated in
Olbiogaster and
Sylvicola. Both wings lie flat over the abdomen in the resting position. A pterostigma is present or absent, and the wing membrane is densely covered with microtrichia (macrotrichia present in
Sylvicola). The costa (C) ends at or just beyond the tip of R4+5. The subcosta (Sc) ends in the costa near the middle of wing and distal to base of Rs. The stem of R is straight (sometimes with an interruption or weakening below crossvein h). Rs arises near but proximal to the middle of the wing, with two branches. R4+5 is long, ending near tip of wing; crossvein r-m is situated near or distal to the fork of Rs. Radial vein 2+3 (R2+3) may end in R1 or end in the costa. The median vein (M) has three or two branches and the discal cell (d) is present or absent. CuA2 is straight or sinuous distally. CuA1, CuA2, and A1 all reach the wing margin. CuP when present is variably distinct; A2 is present but weak apically. The abdomen is slender. ==Identification==