Aclista crassistilus ( 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 : 215-216

Aclista crassistilus ( Kieffer, 1909)

( Figs. 3, 11 , 19 , 27)

Anectata (Anectata) crassistilus Kieffer, 1909: 529 .

Aclista crassistilus: JOHNSON (1992) : 29.

Type locality. Hungary, Szovata.

Type material examined. HOLOTYPE: ♀, ‘Szóvata / Csiki // Holotypus 1909 / Anectata (Anectata) crassistilus Kieffer’ ( MNHN).

Additional material examined. CZECH REPUBLIC: BOHEMIA mer., Třeboň district, Lutová (7055), 20.v.1987, 1 ♀, J. Macek lgt. & det. ( NMPC).

Diagnosis. Female. Head triangular in frontal view, mouth aperture narrower than malar space;

malar space smooth; mandibles short; toruli entire with upraised anterior margin; antennae short and stout, incrassate, 14-segmented; preapical flagellomere transverse; pronotal shoulders rounded; radial cell long (3.0 times as long as marginal vein); marginal vein short (shorter than half of parastigma); gaster suboval; praepygidium short with praepygidial segments narrow and tightly abutted; pygidium short, slightly upraised in lateral view.

Male. Unknown.

Variability. No variation was observed in the limited material available.

Differential diagnosis. Its short mandibles and smooth malar space suggest a close relationship to A. scutellaris , from which it differs by the transverse, loosely articulated preapical flagellomers.

Bionomics. This is a very rare species. Besides the holotype, only one additional specimen is known. It was collected in yellow pan traps placed in a tree hollow.

Distribution: Hungary ( KIEFFER 1909). New record: Czech Republic.

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.