Phytomyza linnaeae (Griffiths)

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 : 76-77

Phytomyza linnaeae (Griffiths)

( Fig. 192 )

Material examined. OREGON: Clackamas Co., Mt. Hood / Mirror Lake , 14.x.2012, em. 28.iv.2013, C.S. Eiseman, ex Linnaea borealis , #CSE370 (2♂) ; Douglas Co., Watson Falls , 19.x.2012, em. 28.iv.2013, C.S. Eiseman, ex Linnaea borealis , #CSE361, CNC358486 , CNC358487 (2♂) .

Host. Caprifoliaceae : Linnaea borealis L.

Leaf mine. ( Fig. 192 ) Whitish, entirely on the upper surface; Griffiths (1974a) described it as “basically linearblotch but with initial linear channel in most cases enclosed by later feeding.” The mines we examined were entirely linear, but sometimes so contorted in the small leaves as to partially form a secondary blotch. Frass is in discrete, closely spaced black particles.

Puparium. Deep yellow, formed within the mine, with its anterior spiracles projecting through the epidermis ( Griffiths 1974a).

Distribution. * USA: OR; Canada: AB, YT ( Griffiths 1974a).

Figures

FIGURES 189–199. leaf mines; 189: Phytomyza hatfieldae spec. nov. in Osmorhiza claytonii; 190: P. hydrophyllivora spec. nov. in Hydrophyllum canadense; 191: P. hydrophyllivora in Hydrophyllum virginianum (yellow puparium at tip of leaf serration, upper right); 192: P. linnaeae (Griffiths) in Linnaea borealis (transmitted light); 193: P. loewii Hendel in Clematis virginiana; 194: P. minuscula Goureau in Thalictrum pubescens; 195: P. omlandi Scheffer & Lonsdale in Gelsemium sempervirens; 196: P. palmeri spec. nov. in Symphoricarpos orbiculatus (transmitted light; puparium at upper left); 197: P. palustris spec. nov. in Micranthes pensylvanica; 198: same, five brown puparia in blisters on lower leaf surface (whitish object along left side of midrib is a coniopterygid cocoon); 199: P. penstemonis Spencer in Penstemon digitalis.