Diamesa davisi, Edwards (Makarchenko, 1980

Makarchenko, Eugenyi A., Semenchenko, Alexander A. & Palatov, Dmitry M., 2022, Taxonomy of Diamesa steinboecki group (Diptera: Chironomidae: Diamesinae) with description and DNA barcoding of known species. II. Subgroups davisi, leona and loeffleri, Zootaxa 5190 (3), pp. 361-392 : 362

Diamesa davisi subgroup

The adult males of this subgroup are characterized by the following features. Antenna with eight flagellomeres and reduced setae of plume. Head with separate, weak frontal protrusions. Eyes hairy; frontal setae few or absent. Wings sometimes reduced, with rounded, often small anal lobe. Hypopygium with three-lobed segment IX, lateral lobes (laterosternites) often extending beyond posterior margin of the middle part (tergite IX). Tergite bands usually U or Y-shaped. Transverse sternapodeme usually triangular, often with a spire-shaped apex. Anal point bent downwards, sometimes strongly reduced. Gonocoxite with a knob-like superior volsella covered with microtrichia, sometimes with short setae. Gonostylus with 3–5 apical teeth and megaseta appearing as a wide terminal spine.