Orasema taku Burks, Heraty & Dominguez, 2018

Burks, Roger A., Heraty, John M., Dominguez, Chrysalyn & Mottern, Jason L., 2018, Complex diversity in a mainly tropical group of ant parasitoids: Revision of the Orasema stramineipes species group (Hymenoptera: Chalcidoidea: Eucharitidae), Zootaxa 4401 (1), pp. 1-107 : 90-93

Orasema taku Burks, Heraty & Dominguez n. sp.

urn:lsid:zoobank.org:act:C5CD1FD7-552A-4241-B552-E1A497998734 ( Figs 215–224 )

Diagnosis. Head areolate-reticulate dorsally. Mesoscutal midlobe areolate-reticulate. Mesoscutellar disc and axillula areolate-reticulate.

The strongly areolate-reticulate sculpture of the head dorsally ( Fig. 216 ) is unique in this group. Description. Female. Length 3.8 mm.

Color: Head and mesosoma green to reddish-green with bronze luster dorsally, bluish-green laterally. Pedicel brown; anellus yellowish brown; flagellum brown. Coxae green, becoming yellow apically; fore femur mostly brown, tips pale; mid femur mostly brown, tips pale; hind femur mostly yellow, with small brown area near midlength. Fore wing hyaline; venation yellowish brown. Petiole green with yellowish luster; gaster brown or green with blue to purple luster.

Head: Head width:head height 1.3; dorsally areolate-reticulate, ventrally reticulate; longitudinal groove between eye and torulus absent; eyes bare, inter-ocular distance:eye height 1.8; malar space:eye height 0.9; supraclypeal area slightly broader than long, smooth medially, with weak sculpture dorso-laterally; clypeus weakly sculptured. Flagellum length:head height 1.2; F2 2.7× as long as broad, 1.1× as long as F3; following funiculars subequal in width, progressively shorter.

Mesosoma: Mesosoma length:height 1.3. Mesoscutal midlobe areolate-reticulate, with minute setae; lateral lobe areolate-reticulate. Axilla areolate-reticulate; mesoscutellar disc areolate to areolate-reticulate, mixed with faint reticulate sculpture; frenal line as weakly sculptured groove; frenum rugose-reticulate; axillular groove anteriorly narrow, broad and foveate posteriorly; axillula areolate. Propodeum with areolate-reticulate median furrow flanking irregular median carina; propodeal disc laterally reticulate to areolate-reticulate; callus reticulate, with a few small setae. Mesepisternum reticulate to areolate-reticulate laterally, smooth ventrally, broadly rounded anterior to mid coxa. Upper mesepimeron smooth anteriorly, weakly sculptured posteriorly; lower mesepimeron reticulate to areolate-reticulate; transepimeral sulcus distinct. Metepisternum laterally reticulate. Hind coxa elongate, more than 1.5× as long as broad; hind femur 5.1× as long as broad. Fore wing 2.6× as long as broad, 1.4× as long as mesothorax; stigma with 4 sensilla separated into pairs. Hind wing costal cell with a broad bare area.

Metasoma: Petiole 1.6× as long as broad, 0.8× as long as hind coxa, areolate to areolate-reticulate, anterior carina weak. Antecostal sulcus irregularly sculptured; acrosternite posteriorly angulate.

Male. Length 2.4–2.8 mm. Head width:head height 1.2–1.3; scape brown; flagellum length:head height 1.4– 1.5, F2 2.0–2.3× as long as broad. Fore femur mostly brown, tips pale; fore tibia yellow; mid femur mostly brown, tips pale; mid tibia mostly yellowish-brown, tips pale; hind femur mostly brown, tips pale. Hind tibia mostly yellowish-brown, tips pale. Petiole 4.3–5.8× as long as broad, petiole length:hind coxa length 1.8–2.1.

Distribution. Bolivia.

Material examined. Holotype: BOLIVIA: Villazon, 3500m, 22°05'08"S, 65°35'37"W, 30.xii.1984, L. Pena [1 ♀, UCRCENT00320963 ], deposited in CNC . Paratypes: Villazon , 3500m, 22°05'08"S, 65°35'37"W, 30.xii.1984, L. Pena [4♂, CNC: UCRCENT00320964–67 ] .

Etymology. The Quechua word for “rough,” referring to the surface sculpture of the head.

Figures

FIGURES 215–220. Orasema taku. Holotype ♀: 215. Habitus. 216. Head. 217. Antenna, with F2 plus pedicel, and F6–F7 inset.218.Mesosoma, dorsal view. 219.Axillula. 220.Stigma and postmarginal vein.

FIGURES 221–224. Orasema taku. Holotype ♀: 221. Propodeum. 222. Petiole (paratype). ♂: 223. Antenna, with F2 plus pedicel, and F6–F7 inset.224. Petiole, hind coxa.