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

Orasema acuminata n. sp.

urn:lsid:zoobank.org:act:DC49B37D-98C3-4BFA-8F87-57BFCF21891C

( Fig. 27 )

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

Description. Female. Length 3.2–3.7 mm ( Fig. 27A ). Color. Head and mesosoma iridescent green-blue-purple. Pedicle brown. Femora pale brown, tips yellow. Head ( Fig. 27B ). 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 ). Mesosoma ( Fig. 27C, F, G ) 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 ). 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 ). 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)] .

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] . 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] . 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] .

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

Figures

FIGURE 26. Distribution map of species in the Orasema acuminata species group.

FIGURE 27. Orasema acuminata. Holotype female (UCRCENT00415025): A, habitus, lateral; B, head, anterior; C, mesosoma, lateral; D, antenna; F, mesosoma, dorsal; G, propodeum, posterior. Paratype male (UCRCENT00247959): E, antenna.