Phytoliriomyza felti (Malloch)

(Figs. 169–170)

Material examined. IOWA: Winneshiek Co., Cresco, Cold Water Creek Rd., 43°25'55.97"N, 92°00'34.78"W, 16.vii.2015, em. 23–27.vii.2015, C.S. Eiseman, ex Pellaea glabella, #CSE1800, CNC654354, CNC654355 (1♂ 1♀); MISSOURI: Franklin Co., Gray Summit, Shaw Nature Reserve, 1.vii.2015, em. 2–19.vii.2015, C.S. Eiseman, ex Asplenium platyneuron, #CSE1662, CNC564747–564750 (1♂ 3♀); em. 27.vii.2015, C.S. Eiseman, ex Pellaea atropurpurea, #CSE1866, CNC654327 (1♂); NORTH CAROLINA: Durham Co., Durham, Pelham Rd., 24.v.2016, em. ~ 5–24.vi.2016, T.S. Feldman, ex Asplenium ? platyneuron, #CSE2581, CNC634771–634773 (3♂); same collection data, em. 16.vi.2016, #CSE2691, CNC638885, CNC638886 (2♀); OKLAHOMA: Payne Co., Mehan, 36.014339° N, 96.996744° W, 7.ix.2015, em. ix.2015, M.W. Palmer, ex Asplenium platyneuron, #CSE2100, CNC564634 (1♂); 28.iii.2016, em. 11–13.iv.2016, M.W. Palmer, ex Asplenium platyneuron, #CSE2652, CNC653990–653993 (2♂ 2♀).

Hosts. Aspleniaceae: Asplenium pinnatifidum Nutt., A. * platyneuron (L.) Britton, Sterns & Poggenb., A. rhizophyllum L.; * Pteridaceae: Pellaea atropurpurea (L.) Link, P. glabella Mett. ex Kuhn (Frick 1959) . In Missouri we have found mines with puparia on Woodsia obtusa (Spreng.) Torr. (Woodsiaceae) in association with mines on Asplenium and Pellaea from which we reared Phytoliriomyza felti, but no adults emerged from the Woodsia mines.

Leaf mine. (Figs. 169–170) A whitish to green blotch, which may occupy an entire pinna of Asplenium platyneuron (Fig. 170). On the larger pinnae of Pellaea, a narrow, gradually widening, serpentine beginning is sometimes evident (Fig. 169). Frass is often not evident on Asplenium spp., but on Pellaea the scattered black grains are conspicuous.

Puparium. Brown; formed within the mine.

Distribution. USA: IL, *IA, *MO, NY, *NC, *OK, TN (Scheffer et al. 2007). We have found leaf mines on Asplenium pinnatifidum and A. platyneuron in OH and on A. rhizophyllum in VT.