authorSzépligeti, 1908

body

shape2 mm [S1][Te1]. ♀ 2.8 - 3.0mm, ♂ 3.0mm [P3]. ♀ 1.9 - 2.5, ♂ 2.0 - 2.3 mm [T14]. 2 - 3.5mm [Ab2]. ♀♂ 2.8 - 3.0mm [P2]. ♀ 2.5, ♂ 2.0 - 2.4 mm [T4, tuberculiventris], 2.0 - 2.5 mm [T5].

colorBlack [S1]. Densely and finely rugose-punctate [T14].

head

shapeHead transverse [S1]. Head in dorsal view (Fig. 1) transverse, 1.8 times as broad as long, eye 1.1 - 1.2 times as long as temple, temple rounded, occiput weakly excavated. Ocelli small and round, fore ocellus far before imaginary tangent to hind pair of ocelli, POL just shorter than OOL. Eye in lateral view 2.1 times as high as wide, temple beyond eye 1.3 - 1.5 times wider than eye and ventrally somewhat narrowing (Fig. 2). Malar space a bit longer than basal width of mandible. Face 1.6 times as wide as high, inner margin of eyes faintly converging ventrally. Clypeus twice as wide as high medially, its lower margin convex (Fig. 3). ♂: Temple in dorsal view just bulging (fig. 12) [P3]. Temple in dorsal view not bulged, i. e. head in dorsal view between temples not broader than between eyes (fig. 16). Temple in lateral view 1/3 wider than eye (Fig. 17, see arrows) [P2].

sculptureHead finely and densely punctated leathery, dull; shiny clypeus [S1]. Face somewhat concentric rugulo-striolate, clypeus smooth and shiny and along lower margin unevenly striate. Head above (vertex + occiput) transversely rugulose (Fig. 1) [P3].

colorPalpi brown [P3].

shape ♀Antennae with 20 segments [S1]. Antenna with ( 16-) 18-20, usually with 18, segments. Antenna slightly longer than head + mesosoma combined. Third segment 3.4 times as long as broad apically and penultimate segment cubic, flagellum evenly thick, segments gradually shortening [P3]. 17 - 19 segments [Ab2]. 18 - 22 segments, length of 3rd segment 3.5 times its width, segments in apical part of flagellum slightly flattened, their length equal to width [T14]. Antennae thick, almost threadlike, 19-22 very easily distinguishable links [H, acuminatus]. Antenna of female with 18(-19) segments, penultimate segment cubic [P2]. Antennal segments slightly flattened and square in apical third (antennae 18—20-segmented) [T4, tuberculiventris].

shape ♂Antennae with 20 segments [S1][P2]. Antenna as long as head, mesosoma and half of carapace combined and with 18 - 21 segments. Third segment 2.5 times and penultimate segment 1.5 times as long as broad, flagellum distally attenuating [P3]. Antennae 18-21-segmented [T5].

colorScape dark brown with faint rusty suffusion. Flagellum yellowish brown [P3].

mesosoma

shapePropodeum indistinctly marked, with weak tubercles [S1]. Mesosoma in lateral view 1.5 times as long as high, propodeum with a weak transverse carina [P3]. Propodeum with indistict carina and small teeth [Te1].

sculptureMesosoma finely and densely punctated leathery, dull [S1]. Mesosoma densely rugose, scutellum rugulose, or with longitudinal rugulae, interspaces smooth and shiny, its margin rugose [P3].

legs

shapeHind femur (2.7) 3.1 - 3.2 (3.3) times as long as broad medially (Fig. 4). Inner spur of hind tibia half as long as basitarsus. Hind basitarsus as long as tarsomeres 2 - 4 combined. ♂: Hind femur 2.9 times as long as broad medially [P3]. Hind femur 3.5 times as long as wide [T14]. Hind femora 4 times as long as wide [T4, tuberculiventris].

color♀: Tips of fore femur and entire fore tibiae yellow-red. Mid and hind tibiae yellow-red except for black tips. ♂ Hind tibiae are darker [S1]. Coxae dark brown; femora brown, fore femur apically yellow; tibiae and tarsi yellow, tibiae 2-3 apically brown, tarsi with brownish tint. ♂: Legs entirely brown. [P3]. ♀ Fore tibiae, apices of fore femora and greater part of middle and hind tibiae brownish yellow. Apices of middle and hind tibiae and tarsi brown. ♂: Hind tibiae in basal half somewhat yellow [T4, tuberculiventris].

wings

shapeVein r slightly longer than 3-SR and as long as r-m. SR1 almost straight [S1]. Fore wing about one-fifth shorter than body. Pterostigma (Fig. 5) 2.8 - 3.0 (usually 3) times as long as wide and issuing r clearly distally from its middle, 3-SR 1.2 times as long as r, SR1 straight; pterostigma 1.3 - 1.6 times as long as 1-R1. ♂: 3-SR and r equal in length [P3]. 1-R1 shorter than pterostigma [T4, tuberculiventris].

colorWings brownish, with black edge [S1]. Tegulae brown, parategulae light brown. Wings subhyaline, pterostigma brown, veins light brown, parastigma yellow [P3]. Wings smoky, pterostigma black [Te1]. Wings darkened [T4, tuberculiventris].

metasoma

shapeCarapace in dorsal view (Fig. 6) 1.8 - 1.9 (2.1) times as long as broad somewhat posteriorly from its middle, moderately broadening posteriorly, apically rounded. Pair of basal keels short. Carapace in lateral view (Fig. 7) (2.7-)2.8-2.9 times as long as high behind [ fig 7: 3.2 times], its hind end rounded, apically with a minute spicule, ventrally somewhat incurved. In ventral view aperture of carapace nearly as long as carapace itself, i.e. carapace apically somewhat incurved (Fig. 11, see arrow). ♂: Carapace in dorsal view (Fig. 13) 1.8 times as long as broad posteriorly, in lateral view 3.0 - 3.2 times as long as high behind (Fig. 10) [P3]. ♀ The carapace of the metasoma is apically bent slightly forward or 0.2 times its length, the length of the metasoma is 1.8–1.9 times its width. The apical tubercle of the metasoma is small, sometimes slightly noticeable [T14]. ♂ Metasoma with a tooth on apex of metasoma (a variable character, but usually rather distinct) [T18]. Metasoma at apex curved forward ventrally by 1/6 to 1/5 of its length, at apex usually with pointed tubercle [T4, tuberculiventris]. ♂ Length of metasoma 1.8-2 times width [T5].

sculptureMetasoma finely rugose, with two keels at the base [S1]. Carapace areolate-rugose, posteriorly rugo-rugulose [P3]. Metasoma at base finely reticulately sculptured, along middle with developed longitudinal folds [T5].

♀ ovipositorOvipositor short and straight [S1]. Ovipositor sheath short [P3].

♂ apertureApical aperture small and elliptic, 2.0 (Fig. 14) to 1.6 times as wide a high (Fig. 15) [P3]. The apical aperture is round or weakly oval, “point-shaped”, 0.1–0.15 times the width of the metasoma [T14].

other info

distributionCZ, DK, PL [FE].

figures

references

links

photos

type description

Data used in the multi-access key

Chelonus pusillus in published keys