Phytomyza artemisivora Spencer

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 : 66

Phytomyza artemisivora Spencer

( Figs. 185–188 , 555–560 )

Material examined: Ukraine: Kharkiv Region: Kharkiv, City Centre , 50°00’N, 36°14’E, 18.viii.2020, Yu. Guglya, ex Artemisia vulgaris (1♂ 2♀) .

Hosts. Asteraceae : Artemisia vulgaris L. ( Spencer 1976), Chrysanthemum L. ( Warrington 2021).

Mine. ( Fig. 185 ) The larva forms a white serpentine upper surface leaf mine. Pupation takes place outside the mine.

Puparium. ( Figs. 186–188 ) Brownish-black, semi-glossy, 2.0 mm long, with shallow but distinct segmentation; surface quite smooth except for wide bands of fine spines. Posterior spiracles set flat on the body cuticle and entirely separate; black, with twelve fine sessile bulbs in an elliptical configuration. Ventral portion of last abdominal segment moderately protruding posteriorly viewed from the side. Anal plate directed ventro-posteriorly.

Cephalopharyngeal skeleton. ( Fig. 555 ) Right mouthhook much larger than the left, each with sharp abducted portion directed ventrally and bearing two accessory teeth. Intermediate sclerite long and straight, with long and sharp process directed ventro-posteriorly, sclerite 1.59× as long as maximum height of left mouthhook. The mouthhook and intermediate sclerite are strongly sclerotized and the pharyngeal sclerite is much less so. The ventral cornu bears oval “closed” window in posterior half. Indentation index 81.

Female head. ( Figs. 556, 557 ) Yellow, with antenna, oc tr and postgena posteriorly black; orbit projecting above eye in profile; 2 orb s, 2 fr s; lunule of medium height, broad, semicircular, reaching the level of the posterior fr s; pped distinctly elongated and narrowed apically, with white pubescence; gena medially 0.3× as high as maximum height of eye.

Female genitalia. ( Figs. 558–560 ) Capsule of spermatheca relatively small, 0.18× as high as height of anterior part of oviscape. Spermathecae equal in size, brown, with slightly corrugated surface, flattened basally and apically, wider than high. Internal duct invagination cylindrical, narrowing medially, 0.9× as deep as height of spermatheca. Spermathecal duct weakly sclerotized. Ventral receptacle flattened S-shaped, with well sclerotized tail that is bowlshaped basally. Body of receptacle hemispherical with slightly curved basal connecting tube, strongly sclerotized, 0.85× as wide as diameter of spermatheca; with opening 0.8× as wide as diameter of spherical part of body.

Distribution. Palaearctic ( Papp & Černý 2019). Ukraine (first record).

Figures

FIGURES 185–193. Figures 185–188: P. artemisivora Spencer; 185: mine with larva (indicated by arrow) in Artemisia vulgaris leaf; 186–187: posterior segments of puparium; 186: lateral view; 187: posterior view. 188: posterior spiracles (posterior view). Figures 189–193: P. aurei Hering; 189: mines in Chaerophyllum aromaticum leaf; 190: puparium on lower leaf surface; 191–192: posterior segments of puparium; 191: lateral view; 192: posterior view. 193: posterior spiracles (posterior view).

FIGURES 555–560. Phytomyza artemisivora Spencer; 555: cephalopharyngeal skeleton; 556: frontal view of head; 557: head viewed from the side; 558: oviscape, ventral receptacle and spermathecae proportionally; 559: spermatheca; 560: ventral receptacle.