Orasema acuminata, Baker & Heraty, 2020

Baker, Austin J. & Heraty, John M., 2020, The New World ant parasitoid genus Orasema (Hymenoptera: Eucharitidae), Zootaxa 4888 (1), pp. 1-84 : 53

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Orasema acuminata

n. sp.

Orasema acuminata n. sp.


( Fig. 27 View FIGURE 27 )

Diagnosis. Distinguished from O. cerulea by the features given in the key.

Description. Female. Length 3.2–3.7 mm ( Fig. 27A View FIGURE 27 ). Color. Head and mesosoma iridescent green-blue-purple. Pedicle brown. Femora pale brown, tips yellow. Head ( Fig. 27B View FIGURE 27 ). HW:HH = 1.0–1.2; face rugose-reticulate; IOD:EH = 1.4–1.6; MS:EH = 0.6–0.8; malar depression weakly impressed between mouth and eye margin; supraclypeal area longer than broad, weakly sculptured; anteclypeus distinct, nearly straight. FL:HH = 0.9–1.0; F2L:F2W = 1.6–1.8, F2L:F3L = 1.1–1.2; funiculars subequal in length distally, equal in width; clava subconical ( Fig. 27D View FIGURE 27 ). Mesosoma ( Fig. 27C, F, G View FIGURE 27 ) ML:MH = 1.3–1.6. Axilla dorsally rounded, on roughly the same plane as the mesoscutellum; scutoscutellar sulcus meeting transscutal articulation medially; frenal line indicated by a strong dorsal carina; axillular sulcus indicated by a strong longitudinal carina. Upper mesepimeron areolate; lower mesepimeron rugose-reticulate. Metepisternum rugose-areolate. HCL:HCW = 1.6–2.0, weakly reticulate; HFL:HFW = 4.9–5.7. FWL:FWW = 2.7–2.9, FWL:ML = 2.1–2.4; basal area and speculum bare, costal cell and wing disc densely setose; submarginal vein with small setae; stigmal vein perpendicular to anterior wing margin. Metasoma. PTL:PTW = 2.2–2.4, PTL:HCL = 1.1–1.3, lateral margin with weak longitudinal carina. Apical setae of hypopygium with several long setae on either side of the midline. Ovipositor not visible.

Male. Length 2.6–3.2 mm. HW:HH = 1.1–1.2. Scape yellow; flagellum with 7 funiculars, FL:HH = 1.1–1.4; anellus disc-shaped; F2L:F2W = 1.2–1.7 ( Fig. 27E View FIGURE 27 ). Femora pale brown, darker medially; tibiae yellow. PTL:PTW = 5.5–6.5, PTL:HCL = 2.0–2.4.

Hosts. Unknown.

Plant associates. Unknown.

Distribution ( Fig. 26 View FIGURE 26 ). Ecuador: NA, ZC; Peru: CS, MD. Collected in February–August.

Material examined. Holotype. ECUADOR. Zamora-Chinchipe: Yacwambi , 33 ° 5’42”S, 78 ° 55’41”W, 3.iv.1965, Luis Peña [♀, deposited in BLCU: UCRCENT00415025 (former AEIC specimen)] GoogleMaps .

Paratypes. EC-UADOR. Napo: Limoncocha, on Rio Napo , 05 ° 8’59”S, 77 ° 49’1”W, 15.vii.1974, Boyce A. Drummond, III, Malaise Trap [1♀, FSCA: UCRCENT00411896] GoogleMaps . PERU. Cusco: Quince Mil , 633m, 13°13’3”S, 70°43’40”W, 23- 31.viii.2012, J.A. Rafael; R.R. Cavichioli; D.M. Takiya, Malaise [1³, INPA: UCRCENT00504574] GoogleMaps . Madre de Dios: Rio Tambopata Res. , 30 km (air) SW Puerto Maldonado, 290m, 12°50’0”S, 69°17’0”W, 1.iii.1982, T.L. Erwin et al. [1³, USNM: UCRCENT00247953]; 25.ii.1984 [1³, USNM: UCRCENT00247958]; 7.v.1984 [1³, USNM: UCRCENT00247951, UCRCENT00247955, UCRCENT00247959] GoogleMaps .

Etymology. From Latin acumin meaning “pointed” in reference to the pointed clava.


American Entomological Institute