Phytomyza davisii (Walton)

Eiseman, Charles S. & Lonsdale, Owen, 2019, New State and Host Records for Agromyzidae (Diptera) in the United States, with the Description of Ten New Species, Zootaxa 4661 (1), pp. 1-39 : 18

Phytomyza davisii (Walton)

( Figs. 25, 26 , 57, 58 )

Material examined. MASSACHUSETTS: Berkshire Co., Lenox, Parsons Marsh , 20.vi.2017, em. 8–10.vii.2017, C.S. Eiseman, ex Ranunculus recurvatus , #CSE3910, CNC939714–939717 (3³ 1♀) .

Hosts. Ranunculaceae : Clematis L., Ranunculus abortivus L., R. * recurvatus Poir. ( Spencer & Steyskal 1986; Winkler et al. 2009).

Leaf mine. ( Figs. 57, 58 ) A blotch adjoining the leaf margin; larva exiting through a slit in the upper epidermis ( Spencer & Steyskal 1986). Each mine on Ranunculus recurvatus began at the tip of a lobe. The newest part of the mine was whitish to pale green, with the earlier portion turning brown. Faint feeding lines were sometimes visible. The sparse, dark brown frass was deposited in fine grains and irregular particles.

Puparium. ( Fig. 26 ) Dark brown; formed outside the mine.

Distribution. USA: IN, * MA, MI, MN, MT, NY, WI; Canada: ON, QC.

Figures

FIGURES 14–26. Figs. 14–15: Liriomyza euphorbiella spec. nov.; 14: adult female; 15: puparium. Figs. 16–17: L. garryae spec. nov.; 16: adult male; 17: puparia. Figs. 18–19: L. phloxiphaga spec. nov.; 18: adult male; 19: puparium. Figs. 20–21: L. cf. trixivora Lonsdale; 20: adult male; 21: puparium. Fig. 22: L. virgo (Zetterstedt), puparium. Figs. 23–24: L. zinniae Spencer; 23: adult male; 24: puparium. Figs. 25–26: Phytomyza davisii (Walton); 25: adult male; 26: puparia.

FIGURES 57–63. leaf mines: 57: Phytomyza davisii (Walton), on Ranunculus recurvatus (mines containing feeding larvae); 58: the same mines, complete and vacated; 59: P. mimuli (Spencer), on Phacelia crenulata (reflected light); 60: same (transmitted light); 61: P. nemophilae spec. nov., on Nemophila parviflora; 62: P. prava Spencer, on Anemone canadensis; 63: P. salviarum spec. nov., on Salvia ballotiflora.