Phytomyza nemopanthi Griffths & Piercey-Normore

Lonsdale, Owen, 2021, Manual of North American Agromyzidae (Diptera, Schizophora), with revision of the fauna of the " Delmarva " states, ZooKeys 1051, pp. 1-481 : 1

Phytomyza nemopanthi Griffths & Piercey-Normore

Phytomyza nemopanthi Griffths & Piercey-Normore, 1995: 24. Scheffer and Wiegmann 2000: 249; Lonsdale and Scheffer 2011: 1196; Scheffer et al. 2021: 62.

Description.

As described for P. ilicicola except as follows (from Lonsdale and Scheffer 2011):

Wing length 1.9 mm (♂), 2.2 mm (♀). Eye height divided by gena height: 3.1-3.6. Thorax slightly less pruinose and without bluish tint.

Chaetotaxy: Anterior ori 1/2 length of posterior ori or absent. Acrostichal setulae in five to six scattered rows.

Colouration: Unlike most (but not all) P. ilicicola , gena never bright white and face and posterior margin of postgena never white, and legs more uniformly pale. Head with brownish to grey tint, without strong colour contrast on gena; face yellowish centrally, and side of face and parafacial dark grey or brownish; gena and occiput dark along posterior and posterolateral margins of eye. Posterolateral corner of frons dark, with spot encompassing base of vertical bristles and often with thin band extending to base of posterior ors; orbital plate variable in coloration, sometimes with light spot posterior to base of anterior ors and posterior ori, or with most of plate dark grey, excluding anterior and anterolateral margins. Legs brown with tibiae and tarsi paler; fore femur sometimes becoming gradually paler to apex.

Genitalia: ( Lonsdale and Scheffer 2011: figs 59, 60) Lateral sclerite of hypophallus usually shorter and less strongly arched, mesophallus thinner before midpoint, and arms of distiphallus more strongly diverging.

Hosts.

Aquifoliaceae - Ilex ambigua , I. collina , I. montana , I. verticillata ( Scheffer et al. 2021), I. mucronata .

Distribution.

Canada: NL. USA: FL, NC, NY, WV, WI.

Type material.

Holotype: Canada. NL: Avalon Peninsula, Cochrane Pond Road, 27.ix-10.x.1991, M. D. Piercey-Normore, in leaf of Nemopanthus mucronata (L.) (1♂, CNC).