Phytomyza ditmani Kulp, 1968

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 ditmani Kulp

Figs 778-780

Phytomyza ditmani Kulp, 1968: 11. Spencer and Steyskal 1986b: 215; Griffiths and Piercey-Normore 1995: 23; Scheffer and Wiegmann 2000: 249; Lonsdale and Scheffer 2011: 1187; Scheffer et al. 2021: 62.

Description.

As described for P. ilicicola except as follows:

Wing length 1.7-2.0 mm (♂), 1.9-2.0 mm (♀).Wing sometimes with additional transverse veins in first and second radial cells apically. Eye height divided by gena height: 3.6-5.0.

Chaetotaxy: Posterior ori shorter than ors, anterior ori minute. Four to six rows of scattered acrostichal setulae.

Colouration: Lunule sometimes paler than frons. Face yellowish medially, brown to dark grey laterally. Gena sometimes distinctly whiter than frons. Posterolateral margin of frons dark, with spot encompassing base of vertical setae, sometimes with dark stripe extending along fronto-orbital plate to level of anterior ors. Gena and occiput sometimes dark along posterior and posteroventral margins of eye. Legs evenly brown.

Genitalia: (Figs 778-780 ) Surstylus relatively short, straight and broadly rounded. Epandrial process (bump above anus) short and rounded. Sclerite of hypophallus 1/2-length of mesophallus, apex broadly rounded, base narrow and upcurved (i.e., comma-shaped); broader apical section sometimes subquadrate. Length of mesophallus 4 × width at midpoint. Arms of distiphallus separate and approximately as long as mesophallus.

Hosts.

Aquifoliaceae - Ilex decidua , I. montana , I. verticillata ( Scheffer et al. 2021).

Distribution.

USA: DC, MD, ME, MI, NC, PA.

Type material.

Holotype: USA. DC: Washington, 30.x.1964, L.A. Kulp, Type No. 67775 (1♂, USNM).

Additional material examined.

See Lonsdale and Scheffer (2011).

Figures

Figures 778 - 786. Phytomyza ditmani Kulp, male genitalia 778 external genitalia, left lateral 779 phallus, ventral 780 hypandrial complex, left lateral 781 - 783 P. glabricola Kulp, male genitalia 781 external genitalia, left lateral 782 phallus, ventral 783 hypandrial complex, left lateral 784 - 786 P. ilicicola Loew, male genitalia 784 external genitalia, left lateral 785 phallus, ventral 786 hypandrial complex, left lateral. Originally published in Lonsdale and Scheffer (2011).