Egle lyneborgi Ackland & Griffiths, 2003

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 : 58-69

21. Egle lyneborgi Ackland & Griffiths, 2003

Figs. 164–169 , 198 .

‘ Egle minuta (Meigen) ’; Lyneborg 1965: 220 (in part), figs. 26–28. Misidentification.

‘ Egle podulparia Suh & Kwon’; Ólafsson 1991: 55; Petersen 2001: 184 (in part). Misidentification.

Egle lyneborgi Ackland & Griffiths in Griffiths, 2003: 2357, figs. 2674–2683; Ackland 2003: 84; Michelsen 2004.

Description. Very similar to Egle minuta but different as follows:

Male. Terminalia ( Figs. 164–169 ): Sternite V with 0–1 setula postero-laterally on basal plate. Epandrium smaller, without setulae on lateral parts (as in E. parva and E. suwai ). Surstyli narrow-based alongside margins of cerci (as in E. parva and E. suwai ); surstyli in lateral view broader on distal half. Apical extension of cerci not constricted on basal part, usually slightly tapering on distal third. Pregonite wider than long; postgonite without anterior transverse edge. Phallus with smaller and distally less inflated epiphallus.

Female. Oviscapt ( Fig. 198 ): Sternite VII slightly broader and sclerotized on middle part; hypoproct more reduced, only consisting of minor apical part with a pair of setulae.

Material examined. DENMARK [ ZMUC]: S Jutland: Birkepøl, Als , 1 female 21.iv.1973, 1 male, 7.v.1977, 3 males 23.iv.1984; 1 male 7.v.1977 ( V. Michelsen). E Jutland: Kramsø Plantage, 1 male 15.iv.1990 ( T. Munk). W Jutland: Ulfborg Skovdistrikt, 1 female 5–8.vi.1980 (S. Andersen & V. Michelsen). NE Jutland: Store Vildmose, 1 female 1.vi.1978 (S. Andersen & V. Michelsen). NE Zealand: Kirke Vaerløse, 1 male 5.v.1995 ( V. Michelsen); Oremose, 2 females 20.iv.2008 ( V. Michelsen); Smør-/Fedtmosen, 2 females 23.iv.2008 ( V. Michelsen); Utterslev Mose, 1 male 29.iv.1975, 8 males, 1 male & female (in copula) 28.iv.1981, 2 males, 5 females 3.v.1981, 1 female 11.v.1981, 2 males 29.iv.1984, 3 males 14.v.1984, 1 female 29.iv.2008 ( V. Michelsen); Vassingerød, 1 male 9.v.1989 (S. Andersen) . FINLAND: [ FMNH]: Ostrobottnia australis: Alavus , 1 male 13.v.1940 (L. Tiensuu) . ICELAND [ ZMUC]: Skaftafell, ex larva July 1962 from Salix phylicifolia , reared 16.iii.1963, 1 male (Lund Univ. Exp.); Hjallar, Heidmörk, nr. Reykvavik , 3 males, 1 female 8–29.vi.1979 (E. Ólafsson) . NORWAY [ ZMUC]: Sør-Trøndelag (inner): Kongsvoll , 900–1100m, 2 males, 1 female 12–20.vi.1985 ( V. Michelsen) . SPAIN: Alicante: Nat. Park Font Roja , 2 males 16.iii.2007 ( V. Michelsen) ; SWEDEN [ MZUL, ZMUC]: Skåne: Ystad , 1 male 13.v.1917 (I. Ammitzböll); Hälsingborg, 2 males, 1 female 3.v.1925 (O. Ringdahl); Ängelholm, 1 male 25.iv.1948 (O. Ringdahl); Klagshamnsudde, 1 female, 16.iv.2008 ( V. Michelsen). Halland: Mästocka ljunghet, on Salix repens , 2 males 4.v.2008 ( V. Michelsen). Småland: Kärshult, Sporda, on Salix repens , 8 males, 1 female 2–3.v.2008 ( V. Michelsen). Värmland: Karlstad, 1 male 25.v.1957 (O. Ringdahl). Torne Lappmark: Abisko, 1 male 4.vii.1917 (O. Ringdahl), 1 female 16.vi.1951 (J. R. Vockeroth), 1 male on Salix 29.v.1975, 1 male, 2 females 1–10.vi.1975 (B.G. Svensson). Also seen from CANADA [ CNC, ZMUC]: Alberta, Banff, 1 male (paratype) 2.vi.1922 (C.B.D. Garrett); New Brunswick: Kouchibouguac Nat. Pk. , 1 male 20.v.1977 (W.P. Hanley) .

Biology. In Iceland reared from catkins of Tea-leafed willow ( Salix phylicifolia L.) ( Lyneborg 1965). Adults of both sexes have been collected in south Sweden on male catkins of Creeping willow ( S. repens L.), while Danish specimens have been taken on flowering Goat willow ( S. caprea L.) and Grey willow ( S. cinerea L.).

Distribution. A Holarctic species, but Palaearctic distribution poorly documented due to confusion with other species until quite recently. Recorded from Iceland, British Isles, Italy and Sweden ( Griffiths 2003), and from Denmark and Norway ( Michelsen 2004). Presently recorded for the first time from Finland and Spain. Widespread in boreal and western parts of North America according to Griffiths (2003).

Relationships. Egle lyneborgi belongs to the E. minuta species group within the E. minuta section (see above).

Figures

FIGURES 164–169. Egle lyneborgi, male terminalia. 164, 165. Sternite V, ventral and lateral views. 166, 167. Hypopygium, caudal and lateral views. 168. Pre- and postgonites, lateral view. 169. Phallus, lateral view. Same scale.

FIGURES 197–199. Egle spp., female terminalia. 197. E. minuta, oviscapt, flat mounted. 198. E. lyneborgi, oviscapt, flat mounted. 199. E. suwai, distal oviscapt, flat mounted [paratype: Denmark]. Same scale.