Ambositra Masner 1961
Creators: name: Chemyreva, Vasilisa G.
name: Vasilenko, Dmitry V.
name: Perkovsky, Evgeny E.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Diapriidae
Ambositra

description: Genus Ambositra Masner, 1961
Diagnosis. Head in dorsal view strongly elongate to as wide as long. Ventral margin of frons defined, represented by lateral and sometimes small median tubercles. Postantennal excavation large to small and densely pubescent inside. Malar sulcus absent. Tentorial pits present, small. Scape reticulate or coriaceous, with simple apical rim. Female antennae 15-segmented, with non-abrupt clava; male antennae 14-segmented with A4 or A3‒A4 modified. Postgena, propleuron and propodeum anteriorly covered by dense pubescence with foamy structures. Mesoscutum smooth, notauli absent. Scutellum with single anterior scutellar pit; lateral margin of scutellar disc carinate. Metascutellum with strongly elevated median and lateral keels. Propodeum with strongly elevated plica. Mesopleuron smooth, sternaulus absent. Legs slender; femora and tibia of all legs longitudinally strigose to reticulate (Fig. 5D). Fore wing with marginal, postmarginal and stigmal veins absent; Sc+R (submarginal) vein not reaching the fore margin of the wing, developed in the basal third of the wing and widened distally. Petiole cylindrical, slightly widened medially (Fig. 11C). Metasoma behind petiole strongly depressed with sharp ages aside (Fig. 5B); T2 and S3 the largest sclerites; base of T2 setose, without notches and elongate grooves but with small depression anteriorly (Fig. 11B); S2 small and pubescent. Male with exposed 1- or 2-segmented cerci on the apical tergite (Figs 11E, 11G).
Key to extinct and extant species of Ambositra.
Males
1. Occipital carina almost completely covered with foamy structures in dorsal view (Fig. 8C); scape coriaceous (Fig. 7E); head very long, 1.5 times as long as wide, with very long gena behind eye (Fig. 7C); malar distance as long as largest diameter of eye; cerci two-segmented (Fig. 11G)....................................................... A. famosa Masner
- Occipital carina mainly bare medially in dorsal view and pubescent laterally (Figs 3A, 5A); scape reticulate; head 1.0‒1.2 times as long as wide, with short gena gradually receding behind eye (Figs 3A, 5A, 8C); malar distance distinctly shorter than largest diameter of eye; cerci one-segmented (Fig. 11E)............................................................ 2
2. A3 at least two times as long as A2 (Figs 5A, 8B)........................................................... 3
- A3 distinctly less than twice as long as A2 (Figs 3A, 11F)..................................................... 4
3. A3 modified, carinate (Fig. 5A)........................................................ A. bicarinata sp. nov.
- A3 not modified, acarinate (Fig. 8B, C).................................................... A. masneri sp. nov.
4. Epicnemial pit distinct and pubescent inside (Fig. 3B); A3 about as long as A4 (Fig. 3)............. A. epicnemia sp. nov.
- Epicnemial pit absent (Fig. 11D); A3 distinctly longer than A4 (Fig. 11F)............ A. villumi (Brazidec & Vilhelmsen)
Females (females of the A. bicarinata and A. masneri are unknown)
1. Occipital carina almost completely covered with foamy structures in dorsal view (Fig. 6C); scape coriaceous (Fig. 6A); head very long, 1.5 times as long as wide, with very long gena behind eye (Fig. 6C); pubescence of wing short, marginal fringe absent (Fig. 7D)........................................................................ A. famosa Masner
- Occipital carina mainly bare medially in dorsal view, and pubescent laterally (Fig. 1A); scape reticulate; head 1.0‒1.1 times as long as wide, with short gena gradually receding behind eye (Figs 1A, 10A); pubescence of wing long, marginal fringe long and distinct (Figs 2C, 10E)............................................................................. 2
2. Epicnemial pit distinct and pubescent inside (Figs 1C, 2A); metapleura partly bare (Fig. 2A); A11 as long as and slightly wider than A10 (Figs 1A, B)................................................................ A. epicnemia sp. nov.
- Epicnemial pit absent (Fig. 10C); metapleura entirely setose (Fig. 10C); A11 longer and wider than A10 (Fig. 10D)............................................................................... A. villumi (Brazidec & Vilhelmsen)
description: Published as part of Chemyreva, Vasilisa G., Vasilenko, Dmitry V. & Perkovsky, Evgeny E., 2024, ' Where there are many cattle' in the Eocene of Ukraine: Review of Ambositra Masner (Hymenoptera, Diapriidae, Ambositrinae) from Rovno amber, with the description of three new species, pp. 499-516 in Zootaxa 5446 (4) on pages 500-501, DOI: 10.11646/zootaxa.5446.4.3, http://zenodo.org/record/11102204