Phytomyza solidaginivora Spencer, 1969

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 : 83

Phytomyza solidaginivora Spencer

( Figs. 205 , 360–365 )

Material examined. MAINE: Washington Co., Perry , Sipp Bay—Old County Rd. , 19.vi.2013, em . 3–5.vii.2013, C.S. Eiseman, ex Doellingeria umbellata , #CSE650, CNC358493, CNC358494 (2♂).

Host. Asteraceae : * Doellingeria umbellata (Mill.) Nees ; Spencer’s (1969) record of Solidago requires confirmation (see Comments).

Leaf mine. ( Fig. 205 ) Whitish, upper surface, narrow, entirely linear; frass in closely spaced grains or beaded strips along the sides.

Puparium. Formed outside the mine.

Distribution. * USA: ME; Canada: AB.

Comments. This species was described from a single specimen Spencer (1969) reared from a plant he identified as a Solidago sp. Griffiths (1976) could not reconcile the preserved leaf with either of the goldenrods common near the type locality (Edmonton, AB) and suggested that the host plant might actually be Canadanthus modestus (Lindl.) G.L. Nesom; however, he was unable to find Phytomyza mines on that host. The leaf in Spencer’s illustration looks very much like Doellingeria umbellata , the host from which we reared this species.

Both specimens are teneral, having died without expanding their wings. The genitalia ( Figs. 360–365 ) differ slightly from those of the holotype in that the hypophallus does not end in a point, but is broadly squared apically with two corners.

Figures

FIGURES 200–207. leaf mines; 200: Phytomyza persicae Frick in Prunus persica (transmitted light; puparium at bottom left); 201: P. plumiseta (Frost) in Thalictrum pubescens; 202: P. ranunculi (Schrank) in Ranunculus repens; 203: P. sempervirentis spec. nov. in Lonicera sempervirens, young mines; 204: same, completed mines; 205: P. solidaginivora Spencer in Doellingeria umbellata; 206: P. solidaginophaga Sehgal in Solidago rugosa; 207: P. spondylii heracleiphaga Spencer in Heracleum maximum (transmitted light).

FIGURES 360–365. Phytomyza solidaginivora Spencer, male genitalia; 360: external components, posterior; 361: postgonite, left lateral; 362: hypandrium, ventral; 363: ejaculatory apodeme; 364: phallus, distoventral (basiphallus and phallophorus excluded); 365: phallus, left lateral.