Ancyrona

Body size: 3.1–8.0 mm. Body shape flat. Gular sutures narrow, subparallel at apex. Frontoclypeal suture present or broadly emarginate. Frons: longitudinal groove or depression absent. Cranium ventrally: tufts of long setae at sides present. Submentum: ctenidium absent. Antennal groove present. Eyes: size large, lateral. Eyes number: two. Epicranial acumination absent. Lacinial hooks: two. Galea: shape sub-clavate. Galea: ciliate setae absent. Mediostipes-Lacinia not fused. Palpifer: outer edge even. Mandibular apical teeth number: two, horizontally situated. Mola absent. Penicillus (at base) long setae. Pubescence above mola or cutting edge absent. Ventral furrow absent. Basal notch shallow or absent. Labrum-Cranium not fused. Epipharyngial sclerite absent. Lateral tormal process: projection projection not developed (all remaining). Ligula: ciliate setae absent. Ligula membranous, not retroflexed, weakly emarginate. Hypopharyngeal sclerite H-shaped. Antenna 10-segmented. Antennal club weakly asymmetrical, sensorial fields absent. Front coxal cavities externally open, internally open. Pronotum transverse. Prepectus present. Middle coxal cavities open. Elytra: long hairs absent. Epipleuron moderate. Elytral interlocking mechanism absent, carinae conspicuous. Elytral punctation regular, scales present. Wing: radial cell oblong (or reduced) or cell moved down, often small, wedge cell absent, cross vein MP3-4 present, cross vein AA1+2-3+4 absent. Front tibiae: spines along side moderate. Hooked spur present. Claws: denticle absent. Parasternites number along ventrites III–VII: one. Spiculum gastrale absent. Tegmen composed of two or three parts. Coxitae undivided. Larva Ancyrona diversa Pic, 1921 (Kolibáč and Zaitsev 2010): Frontal arms Y-shaped. Epicranial stem minute, nearly absent. Endocarina present. Gular sutures conspicuous, convergent. Gula: anterior apodemes absent. Paragular sclerites absent. Hypostomal rods present. Stemmata number: two. Mandibular apical teeth number: two, horizontally situated. Lacinia mandibulae plumose. Mola absent. Maxillary palpi 3-segmented. Palpifer present. Pedunculate seta present. Mala simple. Mala: bidentate protrusion absent. Cardo-Stipes not fused. Cardo: size nearly as large as stipes. Ligula present. Labial palpi 2-segmented. Prementum in two parts, anterior margin even. Torma: two separate lateral sclerites and plate between them. Antennal joints 1, 2 elongate. Sensory appendix longer than half of joint 3. Thoracic sclerites pattern (dorsally) 1–2–0. Thoracic sclerites pattern (ventrally) 1–0–0. Trochanter oblong. Abdominal segment IX transversely divided. Tergite IX flat. Urogomphi present, hooked; median process present.

Africa in the south of Sahara, eastern Asia (from India to Japan and Russian Far East), Australia: Queensland, New South Wales (types of Ancyrona aegra, Ancyrona amica, Ancyrona latebrosa, Ancyrona laticeps, Ancyrona vesca checked), New Guinea (including undescribed species). Strangely enough, one Japanese species, Ancyrona japonica, was introduced to Europe and first recorded in Hungary (“Visegrad 1904”). It has now been collected several times in adjacent Slovakia, on branches of decaying oak. Two Tertiary fossil species are known from European Eocene.