Egle ignobilis, Michelsen, 2009

Michelsen, Verner, 2009, Revision of the willow catkin flies, genus Egle Robineau-Desvoidy (Diptera: Anthomyiidae), in Europe and neighbouring areas, Zootaxa 2043 (1), pp. 1-76 : 39

11. Egle ignobilis sp. nov.

Figs. 109–114 , 182, 183 .

Etymology. The specific epithet ‘ignobilis’ is a Latin adjective meaning unnoticed or disregarded.

Description. Externally closely resembling E. parvaeformis but different as follows:

Male. Small, wing length 3.1–3.3 mm; n=2. Notopleuron without accessory setulae. Hind femur on basal half with longer pv-setae equal to depth of femur. Hind tibia without av-setae. Tergite VI firmly attached to fore margin of syntergosternite VII+VIII. Sternite V ( Figs. 109, 110 ) with setal tufts consisting of only 4–5 equally long setae. Terminalia ( Figs. 109–114 ): Distinctive, in particular shape and setation of surstyli diagnostic.

? Female. Wing length 3.0–3.8mm; n=3. Grey dusting of head and body with a dark brown tinge. Prealar seta only two-thirds length of posterior notopleural seta. Notopleuron without accessory setulae. Proepisternals 1; proepimerals 3–4. Hind tibia without av-setae. Hind femur on basal half with slightly longer pv-setae exceeding half length of femoral depth. Oviscapt ( Fig. 182, 183 ) differs insignificantly as follows: Tergite VI and sternite VI less sclerotized on posterior parts, leaving spiracles VII isolated in membrane below lateral margins of tergite VI. Spermathecae smooth, without cross-wrinkled surface.

Material examined. Type material [ ZMUC]: DENMARK: NE Zealand: Utterslev Mose, 1 male (holotype) 15.iv.2008 ( V. Michelsen ) . SWEDEN: Skåne: Åbrolla, Osby, 1 male 3.iv.2007 ( V. Michelsen ). Doubtfully associated females . FINLAND [ FMNH]: Lapponia kemensis (W): Pallastunturi , 1 female (W.E. Hellén) . NORWAY [ ZMUC]: Sør-Trøndelag (inner): Kongsvoll, 900–1100m, 2 females 12–20.vi.1985 ( V. Michelsen ) .

Biology. Nothing is known, except that the males were collected in localities with flowering Eared willow ( Salix aurita L.), Grey willow ( S. cinerea L.) and Goat willow ( S. caprea L.).

Distribution. Known with certainty only from Denmark and southern Sweden. Doubtfully associated females are known from Finland and Norway.

Figures

FIGURES 109–114. Egle ignobilis, male terminalia [paratype: Sweden]. 109, 110. Sternite V, ventral and lateral views. 111, 112. Hypopygium, caudal and lateral views. 113. Pre- and postgonites, lateral view. 114. Phallus, lateral view. Same scale.

FIGURES 180–183. Egle spp., female terminalia. 180. E. steini, oviscapt, flat mounted. 181. Same, spermathecae. 182.?E. ignobilis, oviscapt, flat mounted [Norway]. 183. Same, spermathecae. Different scales.