Shape and sculpture of the first tergite. a petiole with long row of short transverse wrinkles in front of a large glymma (D. insignita) b petiole with long row of long transverse wrinkles in front of a large glymma (D. nidulator) c petiole very fine sculpture in front of a large glymma (D. bicoloripes) d petiole with a small glymma at the anterior edge of narrow lateral areas (D. angustifrons) e petiole without a glymma but narrow lateral areas (D. limnobia) f petiole with indistinct glymma or lateral areas (D. pineticola). Scale bars: 0.5 mm. https://doi.org/10.5281/zenodo.6368627.