Paradelia setiventris ( Huckett, 1965 )

Michelsen, Verner, 2007, Taxonomic review of Eurasian Paradelia Ringdahl (Diptera: Anthomyiidae) with descriptions of two new species, Zootaxa 1592, pp. 1-44 : 9

3. Paradelia setiventris ( Huckett, 1965)

Figs. 29–33 .

Pegomya (Pegomya) setiventris Huckett, 1965: 125 .

Paradelia (Paradelia) setiventris (Huckett) ; Griffiths 1987: 752, figs. 890–896. For further references and synonymy see Griffiths (1987: 752).

Description. Overall very similar to P. lundbecki but different as follows:

Apparently a slightly larger, medium-sized species (WL 4.9–5.5mm; n=4).

Male. Antenna brown to yellow ochre on basal segments, contrasting with black postpedicel. Legs, apart from brownish black tarsi, yellow ochre, more or less infuscated on distal parts of femora. Abdomen yellow ochre, with narrow dark incisures along posterior margins of tergites, with thin light grey dusting delimiting a dark mid-dorsal stripe widely interrupted at hind margins of tergites II–V; pregenital segments without dusting, shiny.

Upper frons narrower than diameter of anterior ocellus; linear parafrontals widely contiguous. Pair of interfrontal setulae absent. Parafacial narrow, in middle about as wide as basal width of fore tibia. Proepisternals (2)–3. Sternite V ( Figs. 29, 30 ): ventral projection of posterior lobes about twice as deep as wide in middle. Hypopygium ( Figs. 31, 32 ) barely different from that of P. lundbeckii . Gonites ( Fig. 33 ): Pregonite broader; very slender postgonite acutely pointed distally, submedian seta inserted at mid-length.

Female. Antenna with orange yellow basal segments and black postpedicel. Palpus black, on basal third yellow ochre. Thorax extensively yellow ochre on postpronotal lobe, prosternum and scutellum.

Antennal postpedicel moderately enlarged, not reaching margin of face, olfactory pits less conspicuous. Proepisternals 3.

Material examined. RUSSIA [ SIZK]: Yakutia, Ush-Lensk reserve W of Lena river delta, 1 male 10.viii.1989 (A. Tsybul’sky). SWITZERLAND [ ZMUC, MHNG]: Valais: Saas-Fee, 2000–2100m, 1 female 21.vii. 1965 (O. Lomholdt); Visperterminen, 1 male 15.vii.1995 (Merz), 1 male 30.vii.1998 (Merz & Bächli).

Other material (teste D.M. Ackland): AUSTRIA [Coll. D.M. Ackland]: East Tyrol: Matrei 2km E Zedlach, 1320m, swept from meadows in pine forest, 1 male 18.viii.1967 (A.C. & B. Pont).

Distribution. A rarely collected species found sporadically in boreal and elevated parts of the Holarctic Region. A western species in North America ranging from Northwest Territories in the north to New Mexico in the south ( Griffiths 1987). Presently recorded for the first time from the Palearctic Region: Russia (Yakutia) and the Alps ( Austria, Switzerland).

Figures

FIGURES 29 – 33. Paradelia setiventris, male. 29, 30. Sternite V, lateral and latero-ventral views. 31, 32. Hypopygium, lateral and caudal views. 33. Pre- and postgonites, lateral view. Same scale for 29, 30 and 31 – 33 respectively.