Character;"Lachnus crassicornis";"Lachnus pseudonudus Kanturski & Wieczorek, sp. n." "Dorsal chaetotaxy";"Thorax and abdomen very densely covered by very thin, fine and pointed setae, 0.037–0.050 mm long";"Thorax and abdomen covered by very short, inconspicuous setae, arranged in 3–4 rows on each segment with blunt, capitate, spatulate or club-shaped apices, 0.010–0.020 mm long" "Head setae";"As long as setae on antennae, fine with pointed apices";"Shorter than setae on antennae, slightly thick and forked" Antennae;"Antennal segments swollen";"Antennal segments not swollen" Siphunculi;"Siphuncular sclerites very low, siphunculi almost poriform, with little-developed flange with 2–3 rows of polygonal reticulation";"Siphuncular sclerites well-developed, with very well-developed flange with 8–10 rows of polygonal reticulation" "Abdominal cuticle";Smooth;"Wrinkled or reticulated" "Hind tibiae chaetotaxy";"Some setae on distal part of tibiae 3–4 times longer than other setae, 0.14–0.15 mm long";"Some setae on distal part of tibiae 4–5 times longer than other setae, 0.17– 0.22 mm long" "HT I setae";12;14 HLL/BL;1.47–1.68;1.18–1.45 AL/BL;0.57–0.64;0.44–0.53 "ANT VI/ANT III";0.19–0.25;0.25–0.31 "HT II/ANT III";0.27–0.36;0.36–0.45