Melanagromyza asymmetrica Guglya, 2016

Guglya, Yu. A., 2016, Four New Species Of The Genus Melanagromyza (Diptera, Agromyzidae) From Ukraine, Vestnik Zoologii (Vestn. Zool.) 50 (5), pp. 407-414 : 409-410

Melanagromyza asymmetrica Guglya , sp. n. ( figs 11 – 18 )

Type material. Holotype Ơ: Ukraine: Kharkiv Region, near Petrivske (49°10ʹ N, 36°58ʹ E), 10.05.2014, 15.00, motley grass between coniferous and deciduous forest (No Н-78) (Guglya) (dissected) . Paratypes: Kharkiv Region, 1 Ơ, 1 ♀, same locality, 11.05.2014, 15.00, flood land (No Н-79, H-80) (Guglya); 2 Ơ, near Haidary (49°37ʹ N, 36°19ʹ E), 04.06.2011, 18.00, motley grass in a gully (No Н-81, H-82) (Guglya) (all dissected) .

D e s c r i p t i o n. Head ( figs 11 – 12 ). Orbit not projected above eye in profile; 2–3 orb s, 3 fr s (all strong), all specimens in type series with different numbers of orb s, more, often two left and three right; frorb sta in two rows, mainly reclinate and lateroclinate, with a few proclinate at level of lunule; orbit wide and shining (frontal view); frontal carina not differentiated; lunule slightly shining, high, rounded dorsally, with distinct furrow; ocellar triangle matt, narrow, reaching level of 3rd orb s, with very slight contours; frons matt; vibrissa larger than sbvb s; maximum height of eye 5× as high as gena; gena angular; 1st flagellomere round (lateral view), covered with white elongated hairs.

Wing ( fig. 16 ) hyaline; costal vein black, other veins brown; costa reaching M 1; last section of CuA 1 0.8× as long as penultimate; costal sections 2-4 in the ratio of 4.18: 1.12: 1.00; calypter yellowish, margin yellow; hairs of fringe rather long, yellowish. Wing length 2.95 (Ơ) to 3.2 (♀) mm.

Mesonotum weakly shining, blackish-grey (dorsal view); scutellum more matt; 2 dc; ac black, in 10 irregular rows at level of 2nd dc; halters and legs shining black. Mesonotum and scutellum of female more shining with coppery undertone.

Male terminalia ( figs 13 – 15 ). Epandrium covered with long hairs; cerci with long hairs only; inner surface of surstylus covered with numerous small prensisetae; hypandrium Y- shaped, with acute apex; ejaculatory apodeme shorter than phallus; phallus 0.20 mm long, distiphallus complex elongated, oval, acute concaved anteriorly (ventral view); mesophallus of medium length, slightly concaved apically; anterior part and arms of basiphallus strongly sclerotized; both arms are connected by weakly sclerotized crosspiece posteriorly.

Female terminalia ( figs 17 – 18 ) Both spermathecae identical, dark brown, suboval, slightly concaved basally; egg guide 5.4× as long as spermatheca; egg guide narrow, 5.3× as long as its maximum width, acute apically; medial membrane covered with numerous small brown teeth, with one row of somewhat larger teeth located apically along dorsal margin.

B i o n o m i c s. One generation was recorded in May–June. Host plant unknown.

Diagnosis. The new species is superficially similar to Melanagromyza albocilia Hendel, 1931 in having bright whitish-yellow calypter, margin and fringe, last section of CuA 1 0.8× as long as penultimate, costal vein black, other veins beije; arms of basiphallus connected by crosspiece posteriorly, differing by having blackish-grey slightly shining mesonotum, 3 orb s; frorb sta thick, lateroclinate, distiphallus narrowing in posterior third, mesophallus slightly concaved apically (in M. albocilia , body black with yellowish-green tinge and strongly shining mesonotum, 2 orb s, frorb sta sparse, inclinate and reclinate; distiphallus narrowing in posterior half; mesophallus rounded apically).

E t y m o l o g y. The species name reflects asymmertical position of orb s and fr s in the type series.

Figures

Figs 11–18. M. asymmetrica sp. n., holotype: 11, 12 — male head; 13 — phallus, ventral view; 14 — same, lateral view; 15 — epandrium-hypandrium complex and ejaculatory apodeme; 16 — male wing; paratype: 17 — spermatheca; 18 — egg guide, left blade. Scale bar 0.1 mm.