Ambositra Masner, 1961

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, Zootaxa 5446 (4), pp. 499-516 : 500-501

publication ID	https://doi.org/ 10.11646/zootaxa.5446.4.3
publication LSID	lsid:zoobank.org:pub:F42E330F-B61A-4AA8-97E4-FFC0E638BBA1
DOI	https://doi.org/10.5281/zenodo.11102274
persistent identifier	https://treatment.plazi.org/id/B65F677A-BD75-CF16-58B0-FA77FA5FFC28
treatment provided by	Plazi
scientific name	Ambositra Masner, 1961
status

Treatment

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 View FIGURE 5 ). 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 View FIGURE 11 ). Metasoma behind petiole strongly depressed with sharp ages aside ( Fig. 5B View FIGURE 5 ); T2 and S3 the largest sclerites; base of T2 setose, without notches and elongate grooves but with small depression anteriorly ( Fig. 11B View FIGURE 11 ); S2 small and pubescent. Male with exposed 1- or 2-segmented cerci on the apical tergite ( Figs 11E, 11G View FIGURE 11 ).

Key to extinct and extant species of Ambositra .

Males

1. Occipital carina almost completely covered with foamy structures in dorsal view ( Fig. 8C View FIGURE 8 ); scape coriaceous ( Fig. 7E View FIGURE 7 ); head very long, 1.5 times as long as wide, with very long gena behind eye ( Fig. 7C View FIGURE 7 ); malar distance as long as largest diameter of eye; cerci two-segmented ( Fig. 11G View FIGURE 11 )....................................................... A. famosa Masner

- Occipital carina mainly bare medially in dorsal view and pubescent laterally ( Figs 3A View FIGURE 3 , 5A View FIGURE 5 ); scape reticulate; head 1.0‒1.2 times as long as wide, with short gena gradually receding behind eye ( Figs 3A View FIGURE 3 , 5A View FIGURE 5 , 8C View FIGURE 8 ); malar distance distinctly shorter than largest diameter of eye; cerci one-segmented ( Fig. 11E View FIGURE 11 )............................................................ 2

2. A3 at least two times as long as A2 ( Figs 5A View FIGURE 5 , 8B View FIGURE 8 )........................................................... 3

- A3 distinctly less than twice as long as A2 ( Figs 3A View FIGURE 3 , 11F View FIGURE 11 )..................................................... 4

3. A3 modified, carinate ( Fig. 5A View FIGURE 5 )........................................................ A. bicarinata sp. nov.

- A3 not modified, acarinate ( Fig. 8B, C View FIGURE 8 ).................................................... A. masneri sp. nov.

4. Epicnemial pit distinct and pubescent inside ( Fig. 3B View FIGURE 3 ); A3 about as long as A4 ( Fig. 3 View FIGURE 3 )............. A. epicnemia sp. nov.

- Epicnemial pit absent ( Fig. 11D View FIGURE 11 ); A3 distinctly longer than A4 ( Fig. 11F View FIGURE 11 )............ 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 View FIGURE 6 ); scape coriaceous ( Fig. 6A View FIGURE 6 ); head very long, 1.5 times as long as wide, with very long gena behind eye ( Fig. 6C View FIGURE 6 ); pubescence of wing short, marginal fringe absent ( Fig. 7D View FIGURE 7 )........................................................................ A. famosa Masner

- Occipital carina mainly bare medially in dorsal view, and pubescent laterally ( Fig. 1A View FIGURE 1 ); scape reticulate; head 1.0‒1.1 times as long as wide, with short gena gradually receding behind eye ( Figs 1A View FIGURE 1 , 10A View FIGURE 10 ); pubescence of wing long, marginal fringe long and distinct ( Figs 2C View FIGURE 2 , 10E View FIGURE 10 )............................................................................. 2

2. Epicnemial pit distinct and pubescent inside ( Figs 1C View FIGURE 1 , 2A View FIGURE 2 ); metapleura partly bare ( Fig. 2A View FIGURE 2 ); A11 as long as and slightly wider than A10 ( Figs 1A, B View FIGURE 1 )................................................................ A. epicnemia sp. nov.

- Epicnemial pit absent ( Fig. 10C View FIGURE 10 ); metapleura entirely setose ( Fig. 10C View FIGURE 10 ); A11 longer and wider than A10 ( Fig. 10D View FIGURE 10 )............................................................................... A. villumi (Brazidec & Vilhelmsen)