Basalys villumi Brazidec & Vilhelmsen 2022, sp. nov.
Creators: name: Brazidec, Manuel
name: Vilhelmsen, Lars
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Diapriidae
Basalys
Basalys villumi

description: Basalys villumi sp. nov.
urn:lsid:zoobank.org:act: 4204B17E-4659-432C-9266-1C723B434E35
Figs 1F, 5F–H, 6A, Table 1
Diagnosis
Body smooth; scape seven times as long as wide; pedicel conical; flagellomeres cylindrical and longer than wide; F1 longest; F2–F11 similar in length; F2 conspicuously emarginate (Fig. 5D–E); scutellum subquadrate without posterior scutellar pits (Fig. 5F); fore wing bordered with small hairs, r-rs short but distinct, M+Cu nebulous (Fig. 1F); hind wing narrow, two thirds of fore wing length, with long hairs along posterior margin; petiole three times as long as wide (Figs 5D, 6A).
Etymology
We dedicate this species to Villum Fonden, who generously contributed to funding for purchasing the amber pieces studied. The specific epithet is to be treated as a noun in the genitive case.
Type material
Holotype NHMD-608360, a complete male; paratype NHMD-608369, a complete male.
Locality and horizon
Baltic amber is considered to be of Bartonian–Priabonian age, ca 34–38 Ma.
Description
Male
BODY. BL = 1.82 mm. Body highly glabrous. Head globular, as long as high (HeL = 0.33 mm), with sparse short hairs; eye round; toruli situated at middle of eye height; antenna 14-segmented; scape seven times as long as wide; pedicel conical; flagellomeres cylindrical, elongate, distinctly longer than wide, with short hairs; F1 longest, F2–F11 subequal in length; F2 emarginate on anterior third; F12 as long as F1; tapering at apex (antennomeres length of holotype, in mm: Sc- 0.22 mm; P-0.09; F1-0.15; F2-0.09; F3-0.11; F4-0.10; F5-0.11; F6-0.10; F7-0.12; F8-0.10; F9-0.11; F10-0.12; F11-0.11; F12-0.14); mandibles weakly crossing at tip, not sickle or beak-shaped; occipital flange foveate, rather concave.
MESOSOMA. Shorter than metasoma (MsL = 0.63 mm); pronotum not elongate, anterior part setose, epomia absent; mesoscutum slightly convex, smooth, notauli absent; anterior scutellar pit present, round; scutellum subquadrate, without posterior scutellar pits. Fore wing extending beyond metasoma (FwL = 1.78 mm), bordered with small hairs; Sc+R distinctly separated from anterior margin; marginal vein thickened along wing margin, longer than wide; r-rs short; basal vein curved, perpendicular to Sc+R, almost reaching M+Cu; M+Cu nebulous. Hind wing narrow, two thirds of fore wing length; bordered with long setae along posterior margin. Legs slender, covered with scattered setae; femur clavate; tibia weakly broadened apically; tibial spur formula 1-2-2; tarsal claws simple.
METASOMA. Petiole cylindrical, narrow, three times as long as wide (PtL = 0.21 mm; PtW = 0.07 mm), longitudinally striated; gaster ellipsoidal (GL = 0.61 mm; GH = 0.30 mm), glabrous; T2 and S2 longest, covering two thirds of gaster, anterior margin T2 straight; segments 3 and 4 ring-like, segment 5 longer than 3 and 4 combined.
Female
Unknown.
Comments
Using Nixon’s (1980) and Masner & García’s (2002) keys, Basalys villumi sp. nov. keys out to Basalys Westwood, 1833 because of the following characters: antenna with 14 segments, notauli absent, scutellum with anterior scutellar pit, wings fully developed, Sc+R separated from fore margin of wing, fore wing with distinct basal vein, basal margin of large tergite straight. The description of the species is also consistent with the diagnosis of Hou & Xu (2016).
Basalys villumi sp. nov. differs from extant Basalys by having F1 longer than F2 (Nixon 1980; Hou & Xu 2016).
description: Published as part of Brazidec, Manuel & Vilhelmsen, Lars, 2022, New species of belytine and diapriine wasps (Hymenoptera: Diapriidae) from Eocene Baltic amber, pp. 57-86 in European Journal of Taxonomy 813 on pages 76-77, DOI: 10.5852/ejt.2022.813.1733, http://zenodo.org/record/6468167