Aclista angusta ( Kieffer, 1909 )

Macek, Jan, 2007, Revision of Central European species of the Aclista scutellaris complex (Hymenoptera: Diapriidae), Acta Entomologica Musei Nationalis Pragae 47, pp. 211-228 : 224-225

Aclista angusta ( Kieffer, 1909)

( Figs. 1, 9 , 17 , 25)

Anectata (Anectata) angusta Kieffer, 1909: 534 .

Anectata angusta: KIEFER (1916) : 508, 512.

Aclista angusta: NIXON (1957) : 68, 80.

Aclista (Anecoreta) angusta: WALL (1967) : 163.

Anectata (Anectata) fuscicornis Kieffer, 1909: 529 , syn. nov.

Anectata (Anectata) levifrons Kieffer, 1909: 530 , syn. nov.

Anectata (Anectata) soror Kieffer, 1909: 532 , syn. nov.

Oxylabis marshalli Kieffer, 1907: 6 , 8, syn. nov.

Oxylabis (Acanthopsilus) marshalli: KIEFFER (1908) : 395.

Acanthopsilus marshalli: KIEFFER (1916) : 374.

Type locality. France, Forêt de St. Germain.

Type material examined. Aclista angusta . HOLOTYPE: ♀, ‘ Foret de St. Germain // Holotypus 1909 / Anectata (Anectata) angusta Kieffer’ ( MNHN). Aclista soror . HOLOTYPE: ♀, ‘Mesnil-le Roy // Holotypus 1909 / Anectata (Anectata) soror Kieffer’ ( MNHN).

Additional material examined. CZECH REPUBLIC: BOHEMIA bor., Doupovské hory Mts., Úhošťany hill (5645), 3.vi.1981, 3 spec. BOHEMIA centr., Praha – Kunratice (5952), 29.v.1981, 1 spec. ; Praha – Nebušice (5852), 31.v.1982, 4 spec. ; Praha – Krč (5952), 12.vi.1985, 9 spec. ; Medník Nature Reserve (6152), 16.vi.1985, 3 spec. BOHEMIA mer., Dobronice (6652), 8.vii.1985, 3 spec. ; Hluboká nad Vltavou env., Stará obora forest (6952), 6.vii.1982, 1 spec. BOHEMIA or., Dobruška env., Mělčany (5762), 27.v.2002, 1 spec. ; Králický Sněžník Nature Reserve, Mlýnský potok brook (5866), 29.vi.2001, 1 spec. MORAVIA mer., Třešť env., Špičák hill (6759), 20.vi.1983, 1 spec. SLOVAKIA centr., Belianské Tatry National Park, Bielovodská dolina valley (6787), 12.viii.1982, 1 spec. ; Nízké Tatry National Park: Latiborská hola hill, 9.viii.1994, 1 spec. ; Kyslá valley , 11.viii.1982, 3 spec., all J. Macek lgt. & det. ( NMPC) . HUNGARY centr., Tompa , 7.-9.iv.1977, 55 spec., Szabó lgt.( NMPC, HNMH) . POLAND centr., Warszawa, J. Sobieskiego Nature Reserve , 1.vi.1981, 1 spec., Ekipa lgt., J. Macek det. ( NMPC) . GERMANY: BAVARIA, Spiegelau , 7.-11.ix.1995, 1 spec., Barták lgt., J. Macek det. ( NMPC) .

Diagnosis. Habitus slender, petiole narrow; mandibles short, shortly overcrossing, malar area smooth, postmalar area impressed; head triangular in frontal view, genae converging; mouth aperture narrow; metascutellum prominent, conical; radial cell short and narrow; marginal vein almost as long as postmarginal vein; lower plicae of propodeum strongly projecting posteriorly; praepygidium with tightly abutted, narrow segments; medial furrow of macrotergite long with adjacent strong striae; fore tibiae in males with homogeneous longer pilosity.

Male. Differs from the female by long setiform antennae and a slight emargination of flagellomere 1.

Variability. The species displays some variation in the following characters: colour (including appendages) piceous to dark brown; antennae slender to stout; distal flagellomeres quadrate to slightly transverse; petiole slender to stout; petiole sculpture smoothly ribbed to rugose; gaster fusiform to elipsoid; metascutellum conical to rounded; radial cell long to short; marginal vein as long as parastigma to shorter than parastigma; stigmal vein vertical to oblique.

Differential diagnosis. The odd mix of 14-segmented antennae in females, shortly overlapping mandibles (both sexes), absence of malar keel (both sexes), and homogeneous pilosity on front tibiae (males) suggests the species has a rather isolated position within the genus.

Bionomics. Flight period May to August; males are much rarer than females. Hosts unknown.

Distribution. Czech Republic ( MACEK 1989), England ( NIXON 1957), France ( KIEFFER 1909), Switzerland ( WALL 1967). New records: Germany, Hungary, Poland, Slovakia.

Remark. Given the lack of types, the synonymy of Oxylabis marshalli , A. fuscicornis , and A. levifrons is based only on the original descriptions.

Figures

Figs. 1-11. 1-8 – metasoma. 1 – Aclista angusta (Kieffer, 1909); 2 – A. bitensis (Kieffer, 1909); 3 – A. crassistilus (Kieffer, 1909); 4 – A. neglecta (Kieffer, 1907); 5 – A. pseudobitensis sp. nov.; 6 – A. pseudosoror sp. nov.; 7 – A. scutellaris (Thomson, 1859); 8 – A. szelenyii (Móczár, 1938). 9-10 – head, frontal view. 9 – A. angusta; 10 – A. bitensis; 11 – A. crassistilus. Scale bars: 2.0 mm (Figs. 1-8) and 0.5 mm (Figs. 9-10).

Figs. 12-24. 12-16 – head, frontal view. 12 – Aclista neglecta (Kieffer, 1907), 13 – A. pseudobitensis sp. nov.;14 – A. pseudosoror sp. nov.; 15 – A. szelenyii (Móczár, 1938); 16 – A.scutellaris (Thomson, 1859). 17-24 – fore wing, radial cell region. 17 – A. angusta (Kieffer, 1909); 18 – A. bitensis (Kieffer, 1909); 19 – A. crassistilus (Kieffer, 1909); 20 – A. neglecta; 21 – A. pseudobitensis sp. nov.; 22 – A. pseudosoror sp. nov.; 23 – A. scutellaris; 24 – A. szelenyii. Scale bars: 1.0 mm.