Shape of the antennal carina. a antennal carina narrow and flat (D. blanda) b antennal carina narrow and flat, frons with a strong median longitudinal keel (D. carinifrons) c antennal carina widened dorsally to a rather inconspicuous nose-like projection (D. stygia) d antennal carina widened dorsally to a large nose-like projection with transverse striae (D. pineticola) e antennal carina slightly raised dorsally and transverse striate (D. sobolicida) f antennal carina raised and strongly bent upwards forming an ear-like, crescent-shaped plate (D. infesta). Scale bars: 0.5 mm. https://doi.org/10.5281/zenodo.6340012.