Agromyza abiens Zetterstedt

Guglya, Yuliia, 2021, Rearing mining flies (Diptera: Agromyzidae) from host plants as an instrument for associating females with males, with the description of seven new species, Zootaxa 5014 (1), pp. 1-158 : 7

Agromyza abiens Zetterstedt

( Figs. 1–4 , 287–290 )

Material examined: Ukraine: Volyn Region: Dachne, near Lutsk, 50°48’N, 25°22’E, 5–19.viii.2019, Yu. Guglya, ex Anchusa officinalis (1♂ 5♀); Kharkiv Region: Kharkiv, Piatykhatky, 49°10’N, 36°58’E, 8.xi.2020, Yu. Guglya, ex Cynoglossum officinale (1♂, 1♀); Kharkiv, Botanical Garden, 49° 25’ N, 36° 15’ E, 22.viii.2020, Yu. Guglya, ex Echium vulgare (1♂); Dnipropetrovsk Region: near Vasylivka, 48°41’N, 35°35’E, 3.ix.2016, Yu. Guglya, ex Cynoglossum officinale (4♂). The rest of material see in Guglya (2015, 2017).

Hosts. Boraginaceae : Anchusa L., Asperugo L., Cerinthe L., Cynoglossum L., Echium Tourn. ex L., Lappula Moench , Myosotis L., Nonea Medik. , Omphalodes Mill. , Podonosma Boiss. , Pulmonaria L., Symphytum Tourn. ex L. ( Benavent-Corai et al. 2005), Amsinckia Lehm. , Borago L., Brunnera Steven , Lycopsis L., Onosma L., Pentaglottis Tausch. ( Warrington 2021) .

Mine. ( Fig. 1 ) The larva forms a yellowish-brown blotch mine that can be seen equally well from both leaf sides. Several larvae often feed together in one mine. Pupation takes place outside the mine in the soil.

Puparium. ( Figs. 2–4 ) Reddish-brown, glossy, 4.0 mm long, with distinct segmentation; surface quite smooth except for 2–3 row spine bands. Posterior spiracles set on stout conical protuberances that are entirely strongly separate with a distinct wide furrow present between them; with three small dark brown bulbs surrounding one large brown bulb. Anal plate not protruding above the surface of the puparium viewed from the side and directed ventro-posteriorly.

Cephalopharyngeal skeleton. ( Fig. 287 ) Both mouthhooks equal in size and shape, with sharp abducted portion directed anteriorly. Each mouthhook bears two accessory teeth. Intermediate sclerite short and wide, more weakly sclerotized dorsally, 1.07× as long as height of mouthhook. The dorsal cornu bears a wide and long “closed” window. The pharyngeal sclerite is much more sclerotized anteriorly than the ventral and dorsal cornua. Indentation index 66.

Female head. ( Figs. 288, 289 ) Black with frons, lunule, pedicel and orbit yellowish-orange, pped and gena brownish-orange; 2 orb s, 2 fr s; lunule largerly semicircular, reaching the level between fr s; pped small, slightly longer than wide; gena medially 0.08× as high as maximum height of eye.

Female genitalia. ( Fig. 290 ) Capsule of spermatheca relatively large, 0.5× as high as height of anterior part of oviscape. Spermathecae equal in size, dark brown, club-shaped, 3× as long as maximum width and densely segmented. Distal region of spermathecal duct pigmented, apically constricted.

Distribution. Widespread and abundant European species ( Papp & Černý 2015). In Ukraine known only from seven localities (Volyn, Sumy, Kharkiv, Dnipropetrovsk and Donetsk Regions) ( Guglya 2015, 2017).

Comments. The shape of the spermatheca is very close to Agromyza pseudoreptans Nowakowski , but the spermatheca in A. pseudoreptans is wider and sclerotization of the spermathecal duct is distinctly stronger. The imago can be immediately distinguished from A. pseudoreptans by the yellowish-orange face, lunule and orbits and brownish-orange pped and gena.

Figures

FIGURES 1–8. Figures 1–4: Agromyza abiens Zetterstedt; 1: mine in Cynoglossum officinale leaf; 2–3: posterior segments of puparium; 2: lateral view; 3: posterior view. 4: posterior spiracles (posterior view). Figures 5–8: A. albipennis Meigen; 5: mine with larva (indicated by arrow) in Elymus repens leaf; 6–7: posterior segments of puparium; 6: lateral view; 7: posterior view. 8: posterior spiracles (posterior view).

FIGURES 287–294. Figures 287–290: Agromyza abiens Zetterstedt; 287: cephalopharyngeal skeleton; 288: frontal view of head; 289: head viewed from the side; 290: spermatheca. Figures 291–294: A. albipennis Meigen; 291: cephalopharyngeal skeleton; 292: frontal view of head; 293: head viewed from the side; 294: spermathecae.