Sonotrella

Key to Sonotrella subgerera worldwide 1 Male anal plate with additional lateral lobules or inflations; ectophallic parameres smaller than epiphallic parameres, with a pair of large sclerotized hooks..................................................... Calyptotrella Gorochov, 2002 - Male anal plate without additional lateral lobules and inflations; ectophallic parameres larger than epiphallic parameres, without sclerotized hooks................................................................................... 2 2 Male metanotal gland with a distinctly membranous medial projection; medial lobes of epiphallus rather short, not reaching middle of lateral lobes............................................................. Megatrella Gorochov, 2002 - Male metanotal gland with small group of hairs or without any structure in centre; medial lobes of epiphallus rather long, reaching middle of lateral lobes..................................................... Sonotrella Gorochov, 1988