Pupae of Mesozoic Jurochlus Kalugina, 1985 (Diptera: Chironomidae), with description of four new species Author Lukashevich, Elena D. Author Przhiboro, Andrey A. text Zootaxa 2012 3478 434 452 journal article 10.5281/zenodo.282306 7d86de81-f775-436d-8141-60ee9b1e5f24 1175-5326 282306 Jurochlus limbatus sp. nov. ( Figs 1 D, 3F–H, 8A) Type material. Holotype : PIN 4270/2584 (abdominal segments VIII–IX of female pupa). SW Mongolia , Gobi- Altai Aymag, Shar Teg (outcrop 443/1), Upper Jurassic. Etymology. From the Latin limbus (fringe), in reference to fine serration of the anal lobe. FIGURE 3. SEM images of Jurochlus pupae from the Mesozoic of Mongolia: A–E, J. trivittatus sp. nov. : A–C, holotype PIN 4270/2581, female: A, total view (SE), B, outer margin of anal lobe (BSE), C, serration of outer margin of anal lobe (BSE); D, E, paratype PIN 4270/2540, male: D, apex of abdomen (SE), E, outer margin of anal lobe (SE); F–H, J. limbatus sp. nov. , holotype PIN 4270/2584, female: F, total view (BSE), G, outer margin of anal lobe (BSE), H, lateral margin of segment VIII (BSE); I, J, J. adustus sp. nov. , holotype PIN 3965/3209, female: I, apex of abdomen (BSE), J, segments III, IV, V (BSE). FIGURE 4. SEM images (BSE) of Jurochlus trivittatus sp. nov. : A–C, holotype PIN 4270/2581, female: A, segments II, III, B, segments V, VI, C, posterior part of segment VI; D, paratype PIN 4270/2540, male: posterior part of segment VI. Description. Pupa of female. Tergite VIII with submedian darkened areas, anterior margin well-sclerotized, posterior margin darkened; five LS setae, broken off, attachment places distinct. Segment IX. Outer margin of anal lobe sinuate, distinctly convex in middle part and strongly concave in apical third. Outer margin finely serrate; serration clearly visible in middle third of margin, consisting of elongate seta-like spines; inner margin without visible serration. No lateral setae visible. Anal lobes apically tapered into sharp darkened spurs; distance between apical spurs 0.35x as long as width at base of segment IX. Genital sac more darkened than outer adjoining area, elongate, apically slightly tapering with truncate posterior margins, with sheaths not rounded apically. Segment IX with well-darkened area anterior and anterolaterally to genital sac (probable genital plate IX). Measurements. Combined length of abdominal segments VIII–IX, 2300; entire body length (extrapolated), 10500–11500. Abdominal segments VIII: length, 900; width, 2100. Abdominal segment IX: length, 1400; width at base, 1750; distance between tips of anal lobe spurs, 600.