Eutrichosoma burksi, Baker & Heraty, 2020

Baker, Austin J. & Heraty, John M., 2020, Larval morphology and life history of Eutrichosoma mirabile Ashmead and description of a new species of Eutrichosoma (Hymenoptera, Chalcidoidea), Journal of Hymenoptera Research 75, pp. 67-85 : 67

Eutrichosoma burksi sp. nov.

Fig. 3A-F

Diagnosis.

Recognized from other Eutrichosoma by the following combination of characters: body with metallic green coloration; stigma enlarged, stigmal vein short and not elbowed; setae relatively thin and sparse; transversely imbricate sculpture on mesosoma dorsally; lacking vertexal carina.

Female. Length 1.9 mm.

Color. Head, mesosoma, scape, pedicel, and coxae dark green; anellus and flagellum brown; mandible reddish brown; maxilla and labium brown. Femora and tibiae dark brown with green reflections medially, pale at tips. Fore wing hyaline, venation pale brown. Gaster dark brown with green iridescence.

Head (Fig. 3B ). Head in frontal view subcircular; head width:height 1.24; face reticulate; scrobal depression shallow, laterally rounded; eyes with minute setae; malar sulcus present; clypeus smooth with rounded margin; epistomal sulcus distinct and sharply defined; anterior tentorial pit shallow; anteclypeus distinct, broadly rounded; palpal formula 4:3; mandibular formula not observed; occiput strigate, emarginate in dorsal view, dorsal margin evenly rounded; temples present, rounded. Antennal scape not reaching median ocellus; pedicel elongate, more than 1.5 × as long as broad; antenna with 12 flagellomeres, including small terminal button (F12) at end of clava (clava 4-segmented); flagellum length:head height 0.81; anellus disc-shaped; second flagellomere (F2) 0.78 × as long as broad, 0.75 × as long as F3; following flagellomeres subequal in length, gradually broader; clava subconical.

Mesosoma (Fig. 3C-F ). Mesosoma length:height 1.28; mesoscutal midlobe, lateral lobe, axilla, and mesoscutellum transversely imbricate to coriacious, sparsely setose (Fig. 3E ); notauli deeply impressed along entire length; axilla dorsally rounded, on roughly same plane as mesoscutellar disc; scutoscutellar sulcus broad, irregularly foveate, fused with transscutal articulation medially; propodeal disc broadly rounded, reticulate, with median carina (Fig. 3F ); callus bulbous, projecting posteriorly beyond the lateral margins of the propodeum, reticulate, with several long hairs; mesepisternum reticulate; upper mesepimeron smooth; lower mesepimeron reticulate; transepimeral sulcus distinct; propleuron nearly flat, transversely imbricate. Hind femur 3.39 × as long as broad, with long stout setae; hind tibia with long stout setae. Fore wing 2.13 × as long as broad, basal cell and speculum bare, costal cell sparsely setose, wing disc moderately setose; marginal fringe absent; submarginal vein with nine long setae dorsally; marginal vein with eight long setae along the margin; parastigmal vein slightly thicker than submarginal, constricted at connection with marginal vein; stigmal vein straight, narrow, short; stigma large, slightly angled; uncus absent; postmarginal vein short but obvious; hind wing costal cell with a broad bare area medially.

Metasoma. Gaster appears sessile, petiole short and indistinct; first gastral tergum longer than subsequent terga; sparsely setose dorsally, with more setae laterally. Ovipositor sheaths protruding a short distance past the last gastral tergum.

Male. Unknown.

Biology.

Unknown

Material examined.

Holotype: USA: California: San Bernardino Co.: Kelso Dunes Rd , 775m, 34°53'23"N, 115°43'05"W, 19.v.2001, D. Yanega [1 ♀, UCRCENT00221857 ], deposition UCRC.

Etymology.

Named in honor of Roger A. Burks, whose expertise led to the recognition of this specimen as a new species.

Figures

Figure 3. Eutrichosoma burksi sp. nov. holotype, adult female. A Lateral habitus B anterior head C lateral mesosoma D lateral wing E dorsal mesosoma F posterior propodeum.