Stenetra parvula Tselikh & Burks, 2020

Tselikh, Ekaterina & Burks, Roger, 2020, Revision of Stenetra Masi, 1931 (Hymenoptera: Chalcidoidea: Pteromalidae), Zootaxa 4759 (2), pp. 191-208 : 205-208

Stenetra parvula Tselikh & Burks sp. nov.

( Figs 70–77 )

urn:lsid:zoobank.org:act:5175E3C6-81BE-4C2C-B772-76B858ABA67B

Description. Female. Body length 3.3– 3.2 mm; fore wing length 1.9–2.0 mm. Head, mesosoma and propodeum black, the propodeum with dark blue metallic lustre, metasoma in dorsal view dark brown, in lateral view black with metallic green and diffuse coppery lustre; scape, pedicel, second and third segments of clava yellowish-brown, F1–F6 and first segment of clava 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 2.4–2.56× as broad as long and 1.22–1.23× as broad as mesoscutum; in frontal view 1.27–1.31× broader than high. POL 1.95–2.0× OOL. Eye height 1.48–1.5× eye length and 1.88–1.92× as long as malar space. Distance between antennal toruli and lower margin of clypeus 0.8× distance between antennal toruli and median ocellus. Clypeus radially striate, its lower margin emarginate. Antenna with scape 0.84–0.88× as long as eye height and 1.26–0.31× as long as eye length, not reaching anterior edge of median ocellus; pedicel 2.1–2.3× as long as broad and 1.1–1.27× as long as F1; combined length of pedicel and flagellum 0.9–0.93× breadth of head; flagellum almost filiform; anelli equal in length; F1 1.32–1.56× as long as broad and as long as F2, with 2 rows of dense sensilla, F2–F6 longer than broad; clava 2.1–2.26× as long as broad. Mesosoma 1.29–1.3× as long as broad. Scutellum finely reticulate, 0.87–0.88× as long as broad. Propodeum medially 0.42–0.45× as long as scutellum; median carina present, plicae absent; nucha short and alutaceous, 0.5× length of propodeum. Fore wing 2.46–2.5× as long as maximum width; basal cell pilose; speculum open; M 1.0–1.04× as long as P and 1.45–1.6× as long as S; stigma with short uncus. Metasoma lanceolate, 1.6–1.66× as long as mesosoma and head; Mt8 2.9–3.5× as long as broad and 1.1–1.35× as long as Mt7. Ovipositor sheath projecting slightly beyond apex of metasoma.

Material examined. Holotype: ♀, USA, “USA: GA, McIntosh Co., Sapelo Island 20.VI.-18.VII 1987 BRC Hym. Team, FIT live oak forest”, “ HOLOTYPE Stenetra parvula ♀ Tselikh, Burks ” ( CNC).

Paratypes: 1 ♀, USA, “ USA: GA, McIntosh Co., Sapelo Island 20. VI.-18.VII 1987 BRC Hym. Team, FIT live oak forest”, “ PARATYPE Stenetra parvula ♀ Tselikh, Burks ” ( ZISP) ; 1 ♀, “ USA: GA, McIntosh Co., Sapelo Island 9-21.IX 1987 BRC Hym. Team, FIT live oak forest, MT ”, “ PARATYPE Stenetra parvula ♀ Tselikh, Burks ” ( CNC) ; 1 ♀, “ USA: MO, Wayne Co. Williamsville 15-30. VI.1988 J. T. Becker”, “ Stenetra det. R. A. Burks 2004 ”, “ PARA- TYPE Stenetra parvula ♀ Tselikh, Burks ” ( CNC) , 1 ♀, MEXICO, “ Jacala, 7 Mi. NE. 4600’ Hidalgo, Mex. 27-VII- 1954 J.G. Chillcott ”, “ Stenetra det. R. A. Burks 2004 ”, “ PARATYPE Stenetra parvula ♀ Tselikh, Burks ” ( CNC) .

Distribution. USA (Georgia, Missouri), Mexico.

Etymology. The name is derived from the Latin word parvus, meaning “small”, referring to the small body sizes of this species.

Comments. Stenetra parvula is similar to S. californica by females having a pilose basal cell, but differ by having the pedicel longer than F1, Mt8 2.9–3.5× as long as broad, and the head and mesosoma with black coloration. Females of S. parvula are also very similar to S. longuncus and S. miyazakii , the differences between these species given in the key.

Figures

FIGURES 70–77. Stenetra parvula Tselikh & Burks sp. nov. (♀ holotype). 70, antenna; 71, fore wing; 72, head frontal view; 73, head dorsal view; 74, propodeum, dorsal view; 75, metasoma dorsal view; 76, habitus, dorsal view; 77, habitus, lateral view.