Aclista pseudobitensis, Macek, 2007

Macek, Jan, 2007, Revision of Central European species of the Aclista scutellaris complex (Hymenoptera: Diapriidae), Acta Entomologica Musei Nationalis Pragae 47, pp. 211-228 : 219-220

Aclista pseudobitensis sp. nov.

( Figs. 5 , 13, 21 , 29, 33)

Aclista bitensis: NIXON (1957) : 68, 81 (nec Kieffer, 1909: 531), misinterpretation.

Type locality. Czech Republic, central Bohemia, Příbram district, Líchovy.

Type material. HOLOTYPE: ♀, ‘CZ: Bohemia centr.: Příbram dist., Líchovy (6351), 6.x.1985, J. Macek lgt. et det.’ ( NMPC) . ALLOTYPE: J, ‘CZ: C Bohemia, Praha-Radotín (6052), 3.vii.1985, J. Macek lgt. et det.’ ( NMPC). PARA- TYPES: CZECH REPUBLIC: BOHEMIA mer., Stráž nad Nežárkou (6955), 26.vi.1986, ♀; Purkarec – Chýňava (6852), 30.v.1983, ♀. BOHEMIA centr.: Čelákovice env., Lipovka Nature Reserve (5854), 8.-16.vi.1993, ♀; Nižbor env., Vůznice brook (5950), 16.vii.1984, ♀; Jíloviště (6052), 9.ix.1986, ♀; Příbram district , Placy forest (6350), 24.viii.1985, ♀; Vonoklasy (6051), 29.vi.1985, ♀; Karlík (6051), 8.vii.1986, ♀; Karlštejn (6051), 2.viii.1988, ♀; Beroun env., Vysoká stráň hill (6050), 24.viii.1984, ♀; Praha – Kunratice (5952): 22.viii.-1.ix.1991, ♀, 8.vii.-3.viii.1992, 2 ♀♀ 1 J; Praha – Závist (6052), 20.vi.1985, J; Skryje (6048), 6.vi.1981, J; Valdek castle (6249), 29.ix.1985, J; Jirny (5853), 6.vii.1983, J, Šustera lgt. BOHEMIA or.: Spačice (6159), 13.vii.1984, ♀; Orlické hory Mts., Trčkov Nature Reserve (5664), 25.v.-9.vi.1994, ♀, Hájek et Ježek lgt. BOHEMIA occ., Habartice (6646), 31.vii.1982, J. MORAVIA mer.: Podyjí National Park : Ledové sluje caves (7161), 12.viii.1992, ♀, Klapperův potok brook (7161), 11.viii.1992, 1♀ 1 J, Braitava hill (7161), 14.viii.1992, 2 ♀♀; Šobes Nature Reserve (7161), 10.vii.1997, ♀, Baštův mlýn mill (7161), 12.viii.1991, J; Mikulov env., Milovický les forest (7166), 24.vi.1983, ♀; Břeclav env., Boří les forest (7266), 31.viii.1986, ♀, all J. Macek lgt. (unless stated otherwise) & det. ( NMPC). SLOVAKIA occ., Čachtice (7272), 11.viii.1991, J, J. Macek lgt. & det. ( NMPC). POLAND or., Bialowieza National Park , 17.ix.1987, ♀, J. Macek lgt. & det. ( NMPC). GERMANY: BADEN- WÜRTTENBERG, Stuttgart env., Willstetten , 18.viii.1980, ♀, 26.viii.1980, 1 ♀ 2JJ, 28.viii.1980, ♀, all M. Jensen lgt., J. Macek det. ( NMPC). HUNGARY: Pilis Mts. , Pilis hill, 28.viii.1988, ♀, J. Macek lgt. & det. ( NMPC). AUSTRIA: CARINTHIA, zw. Viktring und Seebach , 500 m a.s.l., 12.vi.1977, ♀; Goritsching-Kgl., Viktring, 10.vi.1977, J. STYRIA, Neumarkt nö. Furtner Teich, 865-890 m a.s.l., 3.viii.1966, ♀. VIENNA, Prater, 19.v.1957, ♀; Seebenstein, 6.vi.1959, ♀; LOWER AUSTRIA, Eichgraben, Nagelbachgraben, 320 m a. s.l., 8.ix.1974, J, all Fischer lgt., J. Macek det. ( NHMW, NMPC). FINLAND: Kevo, vi.1989, Goulet lgt., J. Macek det. ( NMPC) .

Diagnosis. Mandibles prominent, sickle-shaped, widely overlapping; strong arcuate malar keel surrounding the smooth posterior part of gena (= postmalar area); antennae 14-segmented; flagellomeres subcylindrical, becoming shorter towards apex; pronotal shoulders slightly prominent, margined; posterior pronotal keel incomplete; epomia strongly developed; metascutellum tuberculate; inner plicae of propodeum converging, projecting posteriorly; radial cell closed, longer than marginal vein; petiole cylindrical and smooth, with longitudinal ribs; basal sculpture of macrotergite with long medial furrow and long fan-shaped lateral striation; males with modified setae on inner side of protibia, flagellomere 1 at base with shallow emargination.

Description. Female. Length: 3.25 mm. Dark brown; head and mesosoma darker than gaster; antennae and appendages yellow

Head transverse in dorsal view with prominent antennal sockets; antennal sockets slightly emarginate between toruli; malar area smooth; postmalar area smooth and surrounded by strong malar keel; malar keel not connected with occipital carina; vertex convex; temples converging posteriorly; ocelli large; transverse eye diameter a little shorter than malar space; eyes pubescent; head in lateral view higher than long; head in frontal view subtriangular, face lustrous; antennal sockets smooth; subantennal furrows absent; epistomal sulcus developed; tentorial pits surrounded by deep hollows; mouth aperture shorter than malar space; clypeus slightly convex in lateral view, smooth; mandibles prominent, sickle-shaped, widely overlapping. Antenna 14-segmented; pubescence of flagellum short with intermittent long hairs; proximal flagellomeres subcylindrical, distal ones submoniliform.

Mesosoma convex, as wide as head; pronotal collar indistinct, pronotal shoulders slightly prominent, margined; posterior pronotal keel incomplete; epomia developed; lateral pronotum strongly impressed, smooth and lustrous, not visible from above; rim connecting pronotal spiracle with tegula distinct; mesoscutum convex; notauli percurrent, diverging posteriorly; scutellum slightly convex, smooth, with large rectangular fovea; axillar depressions smooth with a very fine tuft of pubescence; mesopleuron smooth with large impression in middle; metascutellum tuberculate; lateral sides of metanotum smooth; propodeum subquadrate, its dorsal surface subtrapezoidal, sparsely pubescent with distinct, slightly concave posterior ledge; medial keel of propodeum simple; inner plicae converging, projecting posteriorly. Wings translucent; marginal vein distinctly shorter than parastigma; radial cell closed, longer than marginal vein; stigmal vein slightly oblique to marginal vein, shorter than marginal vein.

Metasoma. Petiole cylindrical, smooth with longitudinal ribs, 1.5 times as long as wide; gaster fusiform, sparsely pubescent; base of macrotergite slightly wider than petiole; basal sculpture of macrotergite with long medial furrow and short irregular lateral striation; praepygidial segments very narrow and closely abutted; pygidium very short, as long as praepygidium.

Male. Differs from the female by the cylindrical flagellomeres, the emarginated flagellomere 1 and the presence of intermittent stiff bristles on the inner side of the fore tibia.

Variability. No significant variation was observed in the available material examined.

Differential diagnosis. The 14-segmented antennae in females and modified setae on the fore tibia of males asign the species unambiguously to the A. scutellaris species complex, with closer affinities to A. pseudosoror sp. nov. (see below). It differs from the latter species by the following characters: i) occipital crenulation present (both sexes); ii) transverse pronotal keel incomplete (female); iii) metasoma slender with pygidium unflexed in repose (female); iv) flagellomere 1 with slight emargination (male).

Bionomics. Poorly known; one female was bred from the pupa of a mycetophilid fly ( NIXON 1957); flight period May to October.

Etymology. The species name refers to Nixon’s misinterpretation of A. bitensis .

Distribution. England, Sweden ( NIXON 1957, as A. bitensis auct.); Austria, Czech Republic, Finland, Germany, Hungary, Poland, Slovakia.

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.