Phytomyza hellebori Kaltenback

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 : 68-70

Phytomyza hellebori Kaltenback

( Figs. 197–201 , 572–576 )

Material examined: Ukraine: Kharkiv Region: Velyka Danylivka, Kharkiv , 50°01’N, 36°18’E, 3–4.xi.2013, ix.2019, I. Moskalets, ex Clematis sp. (8♂ 6♀) .

Hosts. Ranunculaceae : Helleborus Tourn. ex L. ( Benavent-Corai et al. 2005). Clematis sp. —a newly recorded host plant.

Mine. ( Fig. 197 ) The larva forms an upper surface blotch mine. Pupation takes place within the mine, in a “pupal blister” ( Fig. 198 ).

Puparium. ( Figs. 199–201 ) Greyish-brown, silky shining, 2.5 mm long, with distinct segmentation; surface quite smooth except for narrow bands of fine spines bands and the last two abdominal segments finely wrinkled. Posterior spiracles set on long conical protuberances that are entirely separate; black, glossy and sickle-shaped. Anal plate brown, strongly protruding above the surface of puparium viewed from the side and directed posteriorly.

Cephalopharyngeal skeleton. ( Fig. 572 ) Right mouthhook larger than the left, each with distinct abducted portion directed ventro-anteriorly and bearing two accessory teeth. Intermediate sclerite short, its length equal to the maximum height of the left mouthhook. Small parastomal bar exist. The mouthhook, the intermediate sclerite and most of the dorsal cornu are strongly sclerotized; the dorsal cornu dorsally and ventrally and the ventral cornu are much less so. The ventral cornu bears a “closed” window located centrally. Indentation index 86.

Female head. ( Figs. 573, 574 ) Yellowish-rose, with only antenna, palpus, postgena posteriorly and hind margin of eye brown; orbit projecting above eye in profile; 2 orb s, 1 fr s; lunule low, broad, semicircular, reaching the level of the anterior fr s; pped large, rounded; gena medially 0.28× as high as maximum height of eye.

Female genitalia. ( Figs. 575, 576 ) Capsule of spermatheca medium-sized, 0.23× as high as height of anterior part of oviscape. Spermathecae unequal in size, brown, spherical, flattened basally. Internal duct invagination cylindrical, as deep as height of spermatheca. Spermathecal duct weakly sclerotized. Ventral receptacle S-shaped, with well sclerotized tail that is two-bladed in basal half. Body of receptacle spherical with uniformly curved basal connecting tube, strongly sclerotized, 0.76× as wide as capsule of larger spermatheca; with narrow opening, 0.44× as wide as diameter of spherical part of body.

Distribution. Palaearctic, recorded from Belgium, the British Isles, Corsica, Finland, France, Germany, Italy, Spain and also Japan ( Papp & Černý 2019). Ukraine (first record).

Figures

FIGURES 194–201. Figures 194–196: Phytomyza glechomae Kaltenbach; 194: mine with larva (indicated by arrow) in Glechoma hederacea leaf; 195: empty puparium viewed from the side; 196: posterior segments of puparium (posterior view). Figures 197–201: P. hellebori Kaltenback; 197: mine in Clematis sp. leaf; 198: “pupal blister” with puparium; 199: empty puparium (lateral view); 200: posterior segments of puparium (posterior view). 201: posterior spiracle (posterior view).

FIGURES 572–576. Phytomyza hellebori Kaltenback; 572: cephalopharyngeal skeleton; 573: frontal view of head; 574: head viewed from the side; 575: oviscape, ventral receptacle and spermathecae proportionally; 576 a–b: the largest spermatheca and ventral receptacle proportionally; a: spermatheca; b: ventral receptacle.