Phytomyza chaerophylli Kaltenback

Guglya, Yuliia, 2025, Rearing mining flies (Diptera: Agromyzidae) from host plants as an instrument for associating females with males, with the description of two new species. Report 2, Zootaxa 5658 (1), pp. 1-86 : 35-36

Phytomyza chaerophylli Kaltenback

( Figs. 68–70 , 249–255 )

Material examined. Ukraine: Volyn Region: Ostrovje, 51°33'06"N, 23°47'24"E, 24.v.2019, Yu.Guglya (1♂); Transcarpathia: Kvasy , 560 m a. s. l., 48°09'52"N, 24°17'03"E, 12.viii.2021, Yu. Guglya (1♂); 1 km SEE Rakhiv

Center, 730 m a. s. l., 48°3'N, 24°13'E, 22.vii.2017, Yu. Guglya (1♂ 2♀) ; Kyiv Region: near Rzhyshchiv , ecostation “Hlyboki Balyky”, 49°57'44"N, 31°07'08"E, 23.v.2021 —mine with larva collected, 7.vi.2021 —imago, Yu. Guglya, ex Anthriscus sylvestris (1♂) ; same locality, 24.vi.2021 – pupation outside the mine, 1.x.2021 —imago, Yu. Guglya, ex Anthriscus sylvestris (1♂) ; Kharkiv Region: near Mokhnach , 49°44'N 36°32'E, 10.vi.2023, Yu. Guglya (6♂ 7♀) ; Donetsk Region: Kryva Luka , 48°52'34"N, 37°54'37"E, 1.vi.2019, Yu. Guglya (1♂) .

Hosts. Apiaceae : Anthriscus Pers. , Carum L., Chaerophyllum L., Conium L., Conopodium W.D.J. Koch , Daucus L., Orlaya Hoffm. , Selinum L., Sison L., Tordylium Tourn. ex L., Torilis Adans. ( Benavent-Corai et al. 2005) .

Mine. ( Fig. 68 ) The solitary larva forms a white linear upper surface leaf mine, moving along the leaf margin. Frass grains arranged along both margins of the mine irregularly. Pupation takes place outside the mine.

Puparium. ( Figs. 69, 70 ) Pale brown, semi-glossy, 1.8 mm long, with shallow but distinctly visible segmentation; surface quite smooth except for wide bands of fine spines between all segments. Posterior spiracles set flat on the body cuticle and entirely separate; dark brown with 15–17 fine sessile bulbs in an elliptical configuration. Ventral portion of last abdominal segment not protruding posteriorly viewed from the side. Anal plate directed ventro-posteriorly.

Cephalopharingeal skeleton. ( Fig. 252 ) Right mouthhook larger dorsally than the left, both with ventro-anterior portion acute, abducted ventrally. Mouthhooks bear two sharp accessory teeth; dorsal teeth are larger than ventral; all uniformly curved and directed ventrally. Mouthhooks and intermediate sclerite are strongly sclerotized, dorsal and ventral cornua much less so. Intermediate sclerite straight, long, 1.47× as long as height of right mouthhook; bears two sharp teeth on the posterior third of ventral margin directed ventro-posteriorly. Ventral cornu bears small “closed” window posteriorly. Indentation index 84.

Female head. ( Figs. 249, 250 ) Brown, with frons, face, gena and labellum brownish-yellow; 1 st fl with thick pale pubescence; fronto-orbital plate visible laterally; 2 ors, 1 ori; lunule of medium height, broad, semicircular, reaching the level of ori; 1 st fl large and spherical, with venter somewhat flattened; gena medially 0.31× as high as maximum height of eye.

Wing. ( Fig. 251 ) Hyaline, with costa, R 1+2, R 3+4 brown, the remaining veins pale; costa ending after R 3+4; second cross vein absent; calypter beige, margin and fringe brown. Wing length 1.9 mm.

Female genitalia. ( Figs. 253–255 ) Spermathecae of medium size, 0.2× as high as anterior part of oviscape. Proctiger cylindrical, with two pairs long setae located on posterior margin between cerci. Cerci closely spaced. Cercus wide oval, tapering apically, 0.2× as long as proctiger; medium and short setae located subapically and apically. Spermathecae equal in size, brown, with smooth surface, wider than high and flattened basally and apically. Internal duct invagination wrinkled, 0.85× as deep as height of spermatheca, cylindrical. Spermathecal duct narrow and very weakly sclerotized. Ventral receptacle brown, S-shaped, with well sclerotized tail that is bowl-shaped in basal half. Body of receptacle spherical, with slightly curved basal connecting tube, strongly sclerotized. Basal connecting tube at confluence of tail invaginated, 2.2× as wide as tail. Opening of medium size, 0.67× as wide as a diameter of spherical part of the body.

Distribution. Palaearctic species known from 24 European countries, as well as from Turkey and Japan ( Papp & Černý 2019). Ukraine (first record).

Comments. At least two generations develop during the year in Ukraine, with pupation at the end of May and at the end of June. Female genitalia are very similar to P. aurei . The main differentiating characteristics are the shape of proctiger, cerci and basal connecting tube with tail in ventral receptacle (see description above).

Figures

FIGURES 68–73. Figures 68–70: Phytomyza chaerophylli Kaltenback; 68: mines with larvae in Anthriscus sylvestris leaf; 69: empty puparium viewed from the side; 70: posterior segments of puparium (posterior view). Figures 71–73: Phytomyza doronici Hering; 71: mine in Doronicum austriacum leaf; 72: puparium viewed from the side; 73: posterior segments of puparium (posterior view).

FIGURES 249–255. Phytomyza chaerophylli Kaltenback; 249: frontal view of head; 250: head viewed from the side; 251: wing; 252: cephalopharingeal skeleton; 253: oviscape, ventral receptacle and spermathecae proportionally; 254 a, b: spermathecae and ventral receptacle proportionally; a: spermatheca; b: ventral receptacle; 255: proctiger.