Poemyza zuskai

Family

Subfamily

Genus

Subgenus

Species

Poemyza zuskai Nowakowski, 1973

Mine

Lower-surface blotch mine, which occupies most of the top section of the leaf, with several larvae within the mine. Frass is irregular, flaky and frequently washed out, greenish. Pupariation occurs inside the mine, with the puparium anchored within the mine by a silk thread.

Host Plants

• Elymus

Confusion Species

Other Cerodontha spp.

Recording Grade

5

National Status

Unknown.

Puparium

Front spiraculum with 7-12 papillae over two short arms, with the posterior spiraculum having three elongated and strongly curved papillae. The rear spiraculum also has a small, black, finely spinulose wart on its outer side. The puparium is black, matt, rather flat and compressed, 2.5-2.7mm in length.

Adult

Head: 2 ors, 2 ori; orbits not projecting above the eye in profile; orbital setulae in a single row; lunule higher than wide; gena deepest in posterior part, 1/5 height of eye; third antennal segment with short pubescence.
Mesonotum: 4+1 dc, 2nd, 3rd and 4th being noticeably weaker and shorter; acr in 5-6 irregular rows.
Legs: black with only fore knees narrowly yellowish.
Wing: 2.1-2.7 mm; ultimate section of vein M₃₊₄ 1.5-1.7x that of the penultimate; base of wings yellow with veins ochre brown.
Colour: mesonotum and scutellum entirely black, only weakly shining; upper and hind margin of mesopleuron narrowly yellow; squamal margin and fringe whitish-yellow; abdomen blackish.
Caudal projection present.