Stenetra longuncus Tselikh & Burks, 2020

Tselikh, Ekaterina & Burks, Roger, 2020, Revision of Stenetra Masi, 1931 (Hymenoptera: Chalcidoidea: Pteromalidae), Zootaxa 4759 (2), pp. 191-208 : 203-204

Stenetra longuncus Tselikh & Burks sp. nov.

( Figs 52–60 )

urn:lsid:zoobank.org:act:D264C12F-D692-487A-B8DA-04092364EE84

Description. Female. Body length 4.0– 4.8 mm; fore wing length 1.9–2.5 mm. Head, mesosoma and propodeum black, the propodeum with dark blue metallic lustre, metasoma black, Mt1, Mt2 with metallic bluish-green and diffuse coppery lustre; scape of antenna yellowish, funiculus and first segment of clava black, pedicel, F1, F 2 in ventral view, second and third segments of clava yellowish-brown; all coxae and hind femur black with dark blue metallic lustre; fore and mid femora brown, all tibiae apically yellowish-brown and basally yellow; all tarsi yellow except last segment brown; fore wing with brownish tint, venation yellowish-brown; ovipositor sheath black. Head in dorsal view 2.13–2.57× as broad as long and 1.24–1.27× as broad as mesoscutum; in frontal view 1.23–1.3× broader than high. POL 1.43–1.67× OOL. Eye height 1.42–1.61× eye length and 1.08–1.5× as long as malar space. Distance between antennal toruli and lower margin of clypeus 0.74–0.83× distance between antennal toruli and median ocellus. Clypeus radially striate, its lower margin emarginate. Antenna with scape 0.9–1.08× as long as eye height and 1.33–1.69× as long as eye length, not reaching anterior edge of median ocellus; pedicel 1.95–2.0× as long as broad and 0.74–0.9× as long as F1; combined length of pedicel and flagellum 0.96–1.07× breadth of head; flagellum almost filiform; second anellus transverse and about 1.5× as long as first anellus; F1 1.66–1.95× as long as broad and 1.05–1.12× as long as F2, with 3 rows of dense sensilla, F2–F6 longer than broad; clava 2.4–3× as long as broad. Mesosoma 1.27–1.4× as long as broad. Scutellum finely reticulate, 0.86–0.9× as long as broad. Propodeum medially 0.34–0.41× as long as scutellum; median carina present, plicae absent; nucha short and reticulate, 0.31–0.5× length of propodeum. Fore wing 2.38–2.6× as long as maximum width; basal cell pilose; speculum open; M 0.85–0.93× as long as P and 1.17–1.26× as long as S. Metasoma lanceolate, 1.26–1.71× as long as mesosoma and head; Mt8 1.9–2.4× as long as broad and 0.72–1.05× as long as Mt7. Ovipositor sheath projecting slightly beyond apex of metasoma.

Material examined. Holotype: ♀, USA, “VA: Shenandoah N.P. Big. Meadows 1300m 8.vii-20.viii 1987; MT Natural meadow BRC HYM. TEAM ”, “ Stenetra ”, “ Stenetra sp #4 Det. G.A.P. Gibson, 2011”, “ HOLOTYPE Stenetra longuncus ♀ Tselikh, Burks ” ( CNC).

Paratypes: 1 ♀, USA, “Brownsville,.21.Tex., JC Bridwell”, “ USNM: UCRC _ ENT00471769 ”, “ PARATYPE Stenetra longuncus ♀ Tselikh, Burks ” ( USNM) ; 1 ♀, “USA California, Nacimiento , 14.viii.1969, B. Hocking ” , PARATYPE Stenetra longuncus ♀ Tselikh, Burks ” ( USNM) .

Distribution. USA (Texas, Virginia).

Etymology. The name is derived from the word long and Latin word uncus, referring to the distinctive long uncus of stigma fore wing.

Comments. This species is very similar to S. miyazakii ; the differences between these species are given in the key. The Brownsville specimen has a dirty basal cell and it is difficult to see its pubescence.

Figures

FIGURES 52–60. Stenetra longuncus Tselikh & Burks sp. nov. (♀ holotype). 52, stigmal vein and stigma of fore wing; 53, fore wing; 54, antenna; 55, head frontal view; 56, head dorsal view; 57, propodeum, dorsal view; 58, metasoma dorsal view; 59, habitus, dorsal view; 60, habitus, lateral view.