Agromyza pseudoreptans Nowakowski

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 : 11-12

Agromyza pseudoreptans Nowakowski

( Fig. 73 )

Material examined. VERMONT: Chittenden Co., Essex, Woodside Park , 27.vi.2013, em. 16.x.2013, C.S. Eiseman, ex Urtica dioica ssp. gracilis , #CSE944, CNC392661 (1♂) .

Host. Urticaceae : Urtica dioica L.

Leaf mine. ( Fig. 73 ) A brownish or dark greenish linear-blotch; according to Spencer & Steyskal (1986), normally commencing along the leaf margin, turning black when old. Spencer (1969, 1981) had only described the mine as turning darker brown, in contrast with the more blackish mine of Agromyza reptans Fallén , and this is consistent with our observations. Most mines at the Vermont collection site did begin at the leaf margin and follow it for several serrations before becoming a blotch and expanding away from it; however, the mine from which we reared an adult began at a lateral vein away from the leaf margin, then gradually meandered toward the margin, initially bounded by two major veins. The mines are messy-looking, with frass in irregular, dark lumps.

Puparium. Reddish-brown; formed outside the mine.

Distribution. USA: AK, CA, ID, MN ( Scheffer et al. 2007), OR, WA, *VT; Canada: AB, BC, MB, NT, ON, QC; Europe.

Figures

FIGURES 63–74. leaf mines; 63: Agromyza albitarsis Meigen in Populus balsamifera; 64: A. ambrosivora Spencer in Helianthus annuus; 65: A. aristata Malloch in Ulmus rubra; 66: A. bispinata Spencer in Elymus hystrix; 67: A. diversa Johnson in Laportea canadensis; 68: A. fission spec. nov. in Celtis occidentalis; 69: A. idaeiana Hardy in Geum macrophyllum; 70: A. isolata Malloch in Populus balsamifera, young mines (left) with probable A albitarsis mine at leaf margin; 71: same Populus balsamifera leaf with completed mines, A. isolata to left of midrib and probable A. albitarsis to right; 72: A. parca Spencer in Dichanthelium clandestinum; 73: A. pseudoreptans Nowakowski in Urtica dioica; 74: A. pudica in Dichanthelium scoparium.