Stenetra Masi, 1931

Tselikh, Ekaterina & Burks, Roger, 2020, Revision of Stenetra Masi, 1931 (Hymenoptera: Chalcidoidea: Pteromalidae), Zootaxa 4759 (2), pp. 191-208 : 192

Stenetra Masi, 1931

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Stenetra Masi, 1931: 170 . Type species: Stenetra ligustica Masi, 1931 , by monotypy (Holotype ♀, MCSN, examined). Neolonchetron Szelényi, 1982 . Type species: Neolonchetron hungaricum Szelényi, 1982 , by monotypy (Holotype ♀, HNHM,

examined). Synonymy by Bouček (1991: 205).

Diagnosis. Body colour black, dark metallic green or blue, sometimes with diffuse coppery lustre (e.g., Figs 6 , 14 , 22 , 27, 40, 47, 60, 69, 77); fore wing with brownish tint. Head in dorsal view reticulate or alutaceous, clypeus radially striate; mesosoma distinctly reticulate; nucha of propodeum reticulate or alutaceous; metasoma weakly alutaceous and shiny. Head of female in dorsal view 2.0–2.6× as broad as long; scrobes absent; occiput without carina; lower margin of clypeus emarginate. Antennal formula 11263 (e.g., Figs 1 , 9 , 16 , 24, 41, 54, 63, 70), inserted above level of lower edges of eyes (e.g., Figs 3 , 12 , 18 , 28, 35, 49); both anelli transverse; F1 longer than broad (e.g., Figs 1 , 16 , 24, 41, 54, 63, 70), subquadrate or transverse (e.g., Figs 9 , 33 ), with 0–4 rows of dense sensilla, F2–F6 longer than broad; clava symmetric. Mandibular formula 4:4 (e.g., Fig. 49). Mesosoma usually moderately arched dorsally; pronotum without smooth and shiny carina, almost rounded in front; notauli deep and incomplete (e.g., Figs 4 , 11 , 38 , 46); scutellum with weak and shallow frenal line. Propodeum with median carina present only anteriorly, plicae absent or sharp, nucha short and convex, spiracles situated nearer to metanotum (e.g., Figs 5 , 15 , 20 , 31, 37, 43, 57, 66, 74). Petiole transverse. Fore wing with speculum; basal cell bare or pilose; veins not thickened (e.g., Figs 2 , 10 , 17 , 25, 34, 42, 53, 62, 71). Hind coxa in dorsal view bare; hind tibia with two spurs (e.g., Figs 44), sometimes second spur short. Metasoma lanceolate, longer than thorax and head (e.g., Figs 7 , 11 , 22 , 26, 28, 46, 60, 69, 77); Mt8 1.1–6.2× as long as broad; cerci with setae subequal in length.

Distribution. Palearctic and Nearctic.

Comments. Species of this genus are rare and few specimens are represented in collection material. Unfortunately, males and biology are not known for any of the species. Females can be distinguished from those of other Pteromalidae using the key of Bouček & Rasplus (1991). One characteristic of the genus is that the antenna has two anelli, but there is a tendency towards reduction in the size of F1, such that it may resemble a third anellus, in some Palearctic species. In S. caucasica Tselikh sp. nov. F1 is transverse but with one row of dense longitudinal sensilla (e.g., Figs 9 ), whereas in S. khalaimi Tselikh sp. nov. F1 is so short that longitudinal sensilla are lost (e.g., Fig. 33 ).

Figures

FIGURES 1–8. Stenetra californica Tselikh & Burks sp. nov. (1, 2, 7 ♀ paratype, 3–6, 8 ♀ holotype). 1, antenna; 2, fore wing; 3, head frontal view; 4, head dorsal view; 5, scutellum and propodeum, dorsal view; 6, habitus, lateral view; 7, habitus, dorsal view; 8, metasoma dorsal view.

FIGURES 9–15. Stenetra caucasica Tselikh sp. nov. (♀ holotype). 9, antenna; 10, fore wing; 11, habitus, dorsal view; 12, head frontal view; 13, head dorsal view; 14, habitus, lateral view; 15, scutellum and propodeum, dorsal view.

FIGURES 16–23. Stenetra daleskeyae Tselikh sp. nov. (16–19, 22, 23 ♀ holotype, 20, 21 ♀ paratype). 16, antenna; 17, fore wing; 18, head frontal view; 19, head dorsal view; 20, scutellum and propodeum, dorsal view; 21, habitus, dorsal view; 22, habitus, lateral view; 23, metasoma dorsal view.

FIGURES 33–40. Stenetra khalaimi Tselikh sp. nov. (♀ holotype). 33, antenna; 34, fore wing; 35, head frontal view; 36, head dorsal view; 37, scutellum and propodeum, dorsal view; 38, habitus, dorsal view; 39, metasoma dorsal view; 40, habitus, lateral view.