Dissomphalus schubnelli Falières & Nel 2020, n. sp.
Creators: name: Falières, Elsa
name: Nel, André
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Bethylidae
Dissomphalus
Dissomphalus schubnelli

description: Dissomphalus schubnelli n. sp.
(Figs 1-5)
urn:lsid:zoobank.org:act: 93883E6D-B5A9-4A8F-993B-E314FB6D6DB3
TYPE MATERIAL. — Holotype. ♂; MNHN.F. A71308 (PA 16948); MNHN.
TYPE STRATA. — Lowermost Eocene, Sparnacian, level MP7 of the mammal fauna of Dormaal.
TYPE LOCALITY. — Le Quesnoy, Chevrière, region of Creil, Oise department, France.
ETYMOLOGY. — Named after the entomologist Mr Thomas Schubnell.
DIAGNOSIS. — Hypopygium posteriorly triangular, outer median surface flat; clypeus wholly prominent forward, median lobe not well-outlined; dorsal pronotal area short; notauli well-developed and complete; metasomal tergum II longer than I; metasomal tergum II without posterolateral margin strongly incurved; tergal process with pair of dark round pits; no tergal process on tergum III; vein Rs&M of forewing rather oblique.
DESCRIPTION
Male
Body (Fig. 1). 1.25 mm long, not depressed, not strongly foveolate; LFW 0.98 mm; head and mesosoma black; metasoma castaneous lightly iridescent, legs castaneous, antenna castaneous; wings hyaline.
Head (Fig. 3). Smooth, not roughly sculptured; mandible with five apical teeth; five maxillary palpomeres, two or three hardly visible labial palpomeres; no spine on gena; clypeus wholly prominent forward, median lobe not well-outlined; antenna rather long, reaching mid part of metapectal-propodeal complex; 11 flagellomeres, cylindrical but basally narrowed; scape: 0.08 mm long × 0.04 mm wide, pedicel: 0.05 × 0.03 mm, F1: 0.05 × 0.03 mm, F2: 0.06 × 0.03 mm, F3: 0.06 × 0.04 mm, F4: 0.07 × 0.03 mm, F5: 0.05 × 0.04 mm, F6: 0.06 × 0.04 mm, F7: 0.05 × 0.04 mm, F8: 0.05 × 0.04 mm, F9: 0.05 × 0.04 mm, F10: 0.04 × 0.04 mm, F11: 0.08 × 0.04 mm; frons with numerous setae; dorsal part occipital carina present; eye glabrous; WH 0.28 mm; LH 0.34 mm; OOL 0.14; ocellar triangle equilateral.
Mesosoma (Fig. 3A, B). Dorsum smooth, not roughly sculptured but punctured; pronotum with anterior margin of disc apparently not carinate; dorsal pronotal area short; notauli well-developed and complete; parapsidal signum absent or strongly reduced; mesoscuto-mesoscutellar suture opened in its median part, with two lateral foveae, each linked to the suture by thin line; metanotum with medium region narrower than lateral regions, developed medially and overlapping mesoscutellum posteriorly; metanotal groove without foveae but with setae; metapectal-propodeal complex smooth with posterior carina and very small postero-lateral spines.
Forewing (Fig. 2A). Covered with microtricha and bordered with small setae; anterior border not angularly incurved anterior to pterostigma; costal vein present; 2r-rs&Rs vein long and as strong as other veins but not closing cell 2R1; strong vein cu-a more distal than vein M; vein Cu and vein A distal to cu-a; cells R, 1Cu, 2Cu closed; cells 1R1 and 1M absent; no basal stub of Rs+M; poststigmal abscissa of R1 very short, ghost first recurrent vein (FRR) and submarginal cell (cell SMC) present.
Metasoma (Fig. 2B, C). Short petiole; seven tergites, convex, partly covering sternites; posterolateral margin of tergite II without posterolateral margin strongly incurved, with pair
of lateral pits; tergite III without tergal process; hypopygium entire, posteriorly triangular.
Length of tergites. T1 about 0.05 mm, T2 0.12 mm, T3 0.07 mm, T4 0.08 mm, T5 0.07 mm, T6 0.06 mm, T7 0.05 mm.
description: Published as part of Falières, Elsa & Nel, André, 2020, First fossil of the extant flat wasp genus Dissomphalus Ashmead, 1893 (Hymenoptera: Bethylidae: Pristocerinae), pp. 207-213 in Zoosystema 42 (15) on pages 208-211, DOI: 10.5252/zoosystema2020v42a15, http://zenodo.org/record/3822392