Janetiella convolvuli Mirumyan & Skuhravá, 2017

Karimpour, Younes & Skuhrava, Marcela, 2022, Additions to the fauna of gall midges (Diptera, Cecidomyiidae) in Iran, Journal of Insect Biodiversity and Systematics 8 (4), pp. 571-579 : 572-574

Janetiella convolvuli Mirumyan & Skuhravá, 2017 ( Figs 1, 2)

Materials examined. 6♀♀, 11♂♂; IRAN, West Azarbaijan (Azarbaijan-e Gharbi) province , Urmia environs, situated at the 21 st km of Urmia – Mahabad road, vicinity of Arablü village, 10 years old vineyard, 37 ° 24'40''N, 45 ° 14'53''E, Elev. 1278 m a.s.l., ex. Convolvulus arvensis , 15–23, vi. 2020, leg.: Y. Karimpour.

Diagnostic characters Male. Body size 1.3–1.5 mm; wing length 1.6 mm, wing width 0.48 mm. Head black, thorax dark brown, abdomen brown. Antennae composed of two basal segments and twelve flagellomeres. Scape obconical, pedicel globular, flagellomeres composed of basal node and neck; necks as long as nodes; first flagellomere with shortened neck, 12 th flagellomere at the end with egg-shaped pointed part, or this part separated by a shortened neck. Palpi 3-segmented, covered with long setae; first segment short and thick, second and third segments slender, with samelength, wing vein R 1 joining vein Costa before its middle, vein R 5 joining costa before wing apex, Costa broken at this point, Cu poorly visible, forked. Terminalia composed of cylindrical gonocoxites, slightly swollen at inner side near the tip, sparsely covered with long setae which are more abundant in the apical part, with sclerotised rounded apodeme basally. Gonostyli short, about half as long as gonocoxites, with parallel sides, covered with microtrichia, apically with black claw; cerci broad, lobes triangle-shaped, deeply separated, broadened laterally in basal third; hypoproct narrow, with rounded excision, as long as cerci. Aedeagus tubular with rounded tip, as long as gonocoxites. Mediobasal lobes of gonocoxites have small excision apically, shorter than aedeagus.

Female ( Fig. 1B). Body size 1.3–1.5 mm; wing length 1.5 mm, wing width 0.60 mm, body similarly colored as in male. Antennae with two basal segments and twelve flagellomeres. Scape obconical, pedicel globular, flagellomeres cylindrical, without necks, a little broader in basal part; the 12 th flagellomere 1.5 times longer than the 11 th flagellomere. Palpi as in male. Wing vein R1 joining vein Costa before its middle, vein R5 joining vein Costa before wing apex, Costa broken at this point, vein Cu poorly visible, forked. Abdominal segment 2–6 relatively large, sclerotized dorsally, covered with short setae, ventral side without setae; seventh segment small, eighth segment about two times longer than high, in retracted position transversally striated, with two separate, narrow longitudinal sclerites. The ovipositor far protrusible, lower part before cerci slightly broadened. Cerci fused at the end forming one lengthened lamella, hypoproct small and narrow. Ovipositor and hypoproct densely setose.

Larva (the third larval instar, so-called mature larva). 3.1 mm long, 0.75 mm broad, pink-orange coloured. Integument of larval body covered with small oval plates. Head small, conical, with a pair of small short antennae, cephalic apodemes shorter than head capsule. Black oval spot inside posterior part of head capsule are larval eyes (stemmata), visible only in freshly mounted larvae. They consist of many small oval black particles. Spatula sternalis on ventral side of prothoracic segment brown, 137– 140 µm long, with bilobed anterior blade and slender stem which is broadened expand at the bottom. All papillae bear relatively long setae. Terminal segment bears eight papillae; six of them with long setae, two papillae with shorter setae.

Biology. Larvae of J. convolvuli develop in the flower and leaf buds of field bindweed ( Fig. 2A–B) and pupate in the soil. Three up six larvae of J. convolvuli develop in the flower buds ( Fig. 2D). The infested buds do not open, they are enlarged and swollen and covered with whitish pubescence ( Fig. 2D). Larvae may develop in the leaf buds which form small rosettes of small leaves on the tips of shoots. Fully grown larvae leave galls and full in the soil where they pupate. Pupation lasts from 8 up to 11 days. Larvae occur in the galls from May to September. Three or more generations develop per year.