Doliopria baltica Brazidec & Vilhelmsen 2022, sp. nov

Doliopria baltica sp. nov. urn:lsid:zoobank.org:act: 36E9B60D-6971-454F-AD9F-DD69D430C16B Figs 1G, 6B–D, Table 1 Diagnosis Head globular, with sparse long hairs on vertex; apical segment of maxillary palpi bearing one long seta (Fig. 6C); antenna 11-segmented; scape as long as pedicel + F1–F5 combined, scape with apical rim slightly notched; pedicel cylindrical, elongate; F1 narrower; F2–F6 widening; F7–F9 forming distinct club; F7–F8 two times as wide as long; F9 as wide as long (Fig. 6B); anterior scutellar pit suboval, not divided; scutellum subquadrate; propodeum punctuate and carinate (Fig. 6D); hind wing bordered with long setae along posterior margin and distal part of fore margin; petiole cylindrical, slightly longer than wide; gaster ellipsoidal; tergite 2 with anterior margin excised (Fig. 6D). Etymology The species name refers to the origin of the amber piece containing the specimen. The specific epithet is to be treated as an adjective. Type material Holotype NHMD-608374, a complete female partially hidden by a milky coat. Locality and horizon Baltic amber is considered to be of Bartonian–Priabonian age, ca 34–38 Ma. Description Female BODY. BL = 1.20 mm. Body smooth and shiny, sparsely pubescent, hairs very long. Head globular, slightly higher than long with hairs posteriorly (HeL = 0.23 mm); eye oval, glabrous; maxillary palpi 5-segmented with one long seta on apical segment; antenna 11-segmented inserted on transverse shelf of low elevation; toruli separated by shallow cleft; scape as long as pedicel + F1–F5 combined, as long as head, with apical circumference slightly notched; pedicel as wide as scape, cylindrical; F1 narrower than pedicel and longer than wide; F2–F5 slightly shortening and widening; F6 two times as wide as long; F7–F9 wider than long, longer than previous flagellomeres, forming clava; F9 ovoid (antennomeres length of holotype, in mm: Sc-0.19; P-0.05; F1-0.03; F2-0.02; F3-0.02; F4-0.03; F5-0.03; F6-0.03; F7- 0.07; F8-0.07; F9-0.10); mandibles short, only crossing at tips. MESOSOMA. Slightly shorter than metasoma (MsL = 0.43 mm); pronotum with lateral posterior margin straight; mesoscutum large and slightly convex, without notauli or any other sulci; anterior scutellar pit deep, not divided, suboval; scutellum subquadrate; propodeum minutely punctuate in anterior part and carinate. Fore wing extending beyond metasoma (FwL = 0.77 mm), micropubescent and bordered with short setae; only Sc+R present, slightly separate from anterior margin of wing, distally ending in slight thickening of marginal vein. Hind wing length two thirds of length of fore wing (HwL = 0.55 mm), micropubescent; with long setae along posterior margin and distal part of costal margin; three hamuli present; basal cell open. Legs slender, with only hind coxa and femur stouter; tibial spur formula 1-2-2; tarsal claws simple. METASOMA. Petiole cylindrical, narrow, longer than wide (PtL = 0.10 mm; PtW = 0.06 mm), longitudinally striated, bearing several long hairs; gaster ellipsoidal (GL = 0.44 mm; GH = 0.21 mm), not sharply pointed at apex, smooth and glabrous; T2 and S2 longest; T2 covering at least two thirds of gaster, its anterior margin medially excised for distance subequal to petiole length; ovipositor slightly exerted. Male Unknown. Comments In Masner & García’s (2002) keys to the genera of Diapriinae, Doliopria baltica sp. nov. keys out to Doliopria Kieffer, 1910 because of the following characters: frons unarmed, antenna 11-segmented, notauli absent, wings fully developed, Sc+R separate from anterior margin of wing, basal vein absent. The description of the specimen is consistent with the original diagnosis of the genus by Kieffer (1910) and the revised diagnosis of Masner & García (2002). Doliopria baltica differs from extant representatives of this genus as follow: D. americana Fouts, 1926 has a two-segmented club (Fouts 1926); D. brachyptera Ogloblin, 1960 has F9 more lengthened and is brachypterous; D. foersteri Ogloblin, 1960 has short hairs on eyes, flagellomeres longer than wide and lacks the anterior scutellar pit; D. equatoriana Ogloblin, 1960 has F2–F5 longer than wide (Oglobin 1960); D. collegii Ferrière, 1929 has F9 longer (Loiácono et al. 2013); D. flavipes Kieffer, 1910 has F5–6 as long as wide and the petiole shorter (Kieffer 1910); D. myrmecobia Kieffer, 1921 has a two-segmented club and the apical flagellomere sharply pointed at the apex (Loiácono et al. 2013).
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 77-79, DOI: 10.5852/ejt.2022.813.1733, http://zenodo.org/record/6468167
{"references":["Masner L. & Garcia J. L. 2002. The genera of Diapriinae (Hymenoptera: Diapriidae) in the New World. Bulletin of the American Museum of Natural History 268: 1 - 138. https: // doi. org / c 7 zvsh","Kieffer J. J. 1910. Beschreibung neuer sudamerikanischer im Zoologischen Museum zu Berlin aufbewahrter Diapriiden. Entomologische Rundschau 1: 46 - 48. Available from https: // www. biodiversitylibrary. org / page / 43669771 [accessed 2 Jan. 2021].","Fouts R. M. 1926. Notes on Serphoidea with descriptions of new species (Hymenoptera). Proceedings of the Entomological Society of Washington 28 (8): 167 - 179. https: // doi. org / 10.5281 / zenodo. 24228","Ogloblin A. A. 1960. Tres especies nuevas del genero Doliopria del Ecuador (Diapriidae, Hymenoptera). Revista de la Sociedad Entomologica Argentina 22: 69 - 76.","Loiacono M. S., Margaria C. B. & Aquino D. A. 2013. Diapriinae wasps (Hymenoptera: Diaprioidea: Diapriidae) associated with ants (Hymenoptera: Formicidae) in Argentina. Psyche 2013: 320590. https: // doi. org / 10.1155 / 2013 / 320590"]}