Phytomyza crassiseta Zetterstedt

Eiseman, Charles S. & Lonsdale, Owen, 2018, New state and host records for Agromyzidae (Diptera) in the United States, with the description of thirty new species, Zootaxa 4479 (1), pp. 1-156 : 71

Phytomyza crassiseta Zetterstedt

( Fig. 184 )

Material examined. MASSACHUSETTS: Franklin Co. , Sunderland, Falls Rd. , 13.vii.2012, em . 23.vii.2012, C.S. Eiseman, ex Veronica officinalis (1♀); Hampshire Co., Pelham, 88 Arnold Rd. , 25.vi.2014, em . 2–16.vii.2014, C.S. Eiseman, ex Veronica chamaedrys , #CSE1148, CNC384850–384862 (13♀); NORTH CAROLINA: Durham Co., Durham, Duke University , 23.v.2016, em . 29.v–3.vi.2016, T.S. Feldman, ex Veronica persica , #CSE2517, CNC654295–654302 (8♀); Pelham Rd. , 30.iv.2016, em . 14–16.v.2016, T.S. Feldman, ex Veronica peregrina , #CSE2461, CNC634800–634803 (4♀); 14.vii.2017, em. 26–31.vii.2017, T.S. Feldman, ex Veronica serpyllifolia , #CSE4022, CNC939784 (1♀); Scotland Co., Laurinburg, St. Andrews University , 2.v.2016, em . 17.v.2016, T.S. Feldman, ex Veronica arvensis , #CSE2468, CNC634782 (1♀).

Hosts. Plantaginaceae : Hebe speciosa (R. Cunn. ex A. Cunn.) J.C. Andersen ( Spencer 1981) , Veronica arvensis L., V. chamaedrys L., V. officinalis L., V. * peregrina L., V. persica Poir., V. * serpyllifolia L. Ours are the first rearings from Veronica in North America, but these and numerous other Veronica species are used by Phytomyza crassiseta in Europe ( Ellis 2016).

Leaf mine. ( Fig. 184 ) A narrow linear mine at the leaf margin, which may later widen and become blotch-like ( Spencer & Steyskal 1986). Frass is deposited in small black grains or occasionally in short strips.

Puparium. Slender, white or yellowish, with a conspicuous dark band running centrally along the ventral surface; formed within the leaf on the lower surface ( Spencer & Steyskal 1986). In at least one example we examined, the puparium was formed with its ventral surface against the upper epidermis.

Distribution. USA: CA, ID, *MA, *NC, NY ( Scheffer & Lonsdale 2018), PA ( Rosenfeld 2014), VA, WA; Europe. We have seen leaf mines in MD and ME (including a photograph submitted to www.BugGuide.net), and Spencer (1969) reported a probable mine of this species from Canada (QC).

Figures

FIGURES 180–188. leaf mines; 180: Phytomyza clematiphaga Spencer in Clematis hirsutissima (puparium at left); 181: P. clematoides Spencer in Clematis ligusticifolia; 182: P. confusa spec. nov. in?Hydrophyllum virginianum; 183: same; 184: P. crassiseta Zetterstedt in Ƒeronica officinalis; 185: P. doellingeriae spec. nov. in Doellingeria umbellata; 186: P. erigeronis spec. nov. in Erigeron annuus; 187: Phytomyza fricki (Griffiths) in Symphoricarpos sp. (Idaho); 188: same (Wyoming).