Meoneura subinversa, Papp, 2013

Papp, L., 2013, New Species And Records Of Meoneura Rondani, 1856 From The Old World Tropics (Diptera, Carnidae), Acta Zoologica Academiae Scientiarum Hungaricae 59 (3), pp. 213-227 : 221-222

Meoneura subinversa sp. n.

(Figs 21–25)

Holotype male ( HNHM): VIETNAM: Lao Cai Prov., Hoang Lien NP, Tram Ton, along and over a small stream, sweeping – Apr 9–11, 2010, 22.3446499° N, 103.7690706° E, 1904 m, VN2010PL_5, Papp, L. & Soltész, Z.

Paratypes: 3 males ( HNHM): same label data (abdomen of a male is detached and prepared and kept in a plastic microvial with glycerol) .

Measurements in mm: body length 2.07 (holotype), 2.14–2.31, wing length 1.67, 1.92– 2.01, wing width 0.66, 0.71–0.75.

Body and legs all black.

Frons black, anterior 1/3–3/7 dirty yellowish, frontal triangle broad, shiny black, reaching to half distance from anterior ocellus to frontal margin, i.e. also its apex is black. Facial carina narrow, first flagellomere globular. Interfrontal (supralunular) seta 0.10 mm long. Gena anteriorly 0.11–0.12 mm, medially 0.15–0.16 mm broad. Eye round, 0.33 x 0.33 mm. Both dorsal and ventral anterior genal setae 0.16–0.17 mm long, seta between them surprisingly long, 0.10 mm, posterior setae below eye 0.14–0.16 mm. Outer and inner occipitals medium long. Postocellars conspicuously long, 0.10–0.11 mm. Palpi slender, ca. twice longer than flagellomere.

Mesonotum grey (basic colour black but its grey microtomentum is thick). 2 short plus 1 long dorsocentral pairs, anterior dorsocentral seta well posterior to suture. Prescutellar acrostichal seta rather long, 0.12–0.13 mm. Longest anepisternal seta 0.22 mm, longest katepisternal seta 0.20–0.21 mm long.

Wing membrane light brownish grey, veins (incl. costal vein) light brown. MM crossvein 0.065 mm, inter-crossvein section 0.07–0.075 mm. Knob of haltere white, stalk darker brown. Alula broad, subtriangular.

Legs all black, rather shiny (i.e. microtrichia or tomentum less dense). Fore femur postero-ventrally with 3 long setae.

Abdominal sternites comparatively long and thin, sternite 4 0.20 mm × 0.09 mm; male sternite 5 0.20 mm long and 0.12 mm broad. Male sternite 4 and 5 with 3 pairs of long lateral setae each, longest 0.11 mm. Abdominal membrane with a few long setae, which emerge from small dark sclerites. Subepandrial sclerite extremely large. Anal aperture of epandrium small, i.e. cercus also small. Epandrium with several long setae, but only ventrally. Surstylus (Figs 21–22) large, more than twice longer than broad basally, apex round- ed (otherwise with small apical pegs). Surstylus anteriorly with numerous thinner setae, on the caudal edge of basal third there are 4 strong setae. Inner surface of surstylus with 5 extremely large thorns in a row: longest on caudal edge, reduced in size anteriorad. Surstylar thorns flattened. Surstylus subapically with a double sharp process (setal base not seen). Lamella (Fig. 25) broadly rounded, about twice longer than broad with 6 extremely long flattened marginal setae and numerous thin setae on medial surface; the latter setae emerge from round protuberances. Lamellae connected through a strongly sclerotised bridge. Postgonites (Figs 23–24) comparatively long, apical third much narrowing with a hook-like anteriorly curved sharp apex (Fig. 23), apex slightly latero-clinate (Fig. 24).

Etymology. The specific epithet of the new species refers to its kinship of M. inversa ; its most characteristic feature of the male genitalia is the presence of strong thorns on the medial side of surstylus.

Meoneura subinversa sp. n. is a member of the M. inversa – M. hennigi species-group. Its characteristically armed surstylus makes is easily recognisable in this respect. Contrary to M. inversa L. Papp, 1976 ( Mongolia) , its epandrium bears long setae only on its ventral surface. The other species of the group, M. hennigi Gregor differs by the overall shape of surstylus (cf. Gregor 1971: fig. 2). Based on the armature of surstylus the two species are easily identifiable.