Genus Ptychoptera Meigen, 1803

Diagnosis.

Medium sized to large (7-15 mm), slender, black lustrous Nematocera, often with lighter markings on thorax and/or abdomen. Antennae, wings, abdomen, and legs long and slender. Ocelli absent; antenna with 15 to 16 segments. Thorax with deep, posteriorly directed transverse suture. Wing with markings, in particular along the crossveins and where veins bifurcate; spurious vein present on either side of crossvein R-M and wing membrane with a distinct fold between veins A1 and CuA2 (Oosterbroek 2006; Fasbender 2014).