Orasema spyrogaster,

Baker, Austin J. & Heraty, John M., 2020, The New World ant parasitoid genus Orasema (Hymenoptera: Eucharitidae), Zootaxa 4888 (1), pp. 1-84: 64-65

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Orasema spyrogaster

n. sp.

Orasema spyrogaster  n. sp.


( Fig. 34View FIGURE 34)

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

Description. Female. Length 2.5–3.3 mm ( Fig. 34AView FIGURE 34). Color. Scape brown; flagellum dark brown. Coxae brown with iridescence. Head ( Fig. 34BView FIGURE 34). HW:HH = 1.2–1.3; face smooth; eyes covered in long, erect setae, IOD:EH = 1.3–1.4; MS:EH = 0.6–0.7; malar depression absent. Mandibular formula 3:2. Temples present, angulate. Flagellum with 8 funiculars, FL:HH = 1.6–1.7; anellus disc-shaped; F2L:F2W = 2.3–2.6, F2L:F3L = 1.3–1.4; following funiculars subequal in length, gradually broader ( Fig. 34DView FIGURE 34). Mesosoma ( Fig. 34C, FView FIGURE 34). ML:MH = 1.5–1.8. Mesoscutal midlobe smooth; notauli shallow. Scutoscutellar sulcus narrow; frenal line indistinct; axillular sulcus indicated by a strong longitudinal carina. Propodeal disc broadly rounded ( Fig. 34GView FIGURE 34). Prepectus smooth. Mesepisternum weakly areolate laterally, smooth ventrally, nearly straight anterior to mid coxa. HCL:HCW 1.9–2; HFL:HFW 4.5–4.6. FWL:FWW 2.5–2.6, FWL:ML = 2.1–2.2; entirely densely setose. Hind wing costal cell entirely setose. Metasoma. PTL:PTW = 1.6–1.8, PTL:HCL = 0.8–1.0, lateral margin rounded. Antecostal sulcus foveate to smooth posteriorly; acrosternite posteriorly rounded.

Male. Unknown.

Hosts. Unknown.

Plant associates. Unknown.

Distribution ( Fig. 32View FIGURE 32). Brazil: PA, RR. Collected in April, December.

Material examined. Holotype. BRAZIL. Roraima: Amajari, Serra do Tepequem , 3 ° 44’24”N, 61 ° 45’0”W, 1-15.iv.2016, Rafael et al., Malaise [♀, deposited in INPA: UCRCENT00504573]GoogleMaps  . Paratype. BRAZIL. Par: Utinga, Belem , 1 ° 25’12”S, 48 ° 26’24”W, xii.1966, S.J. Oliveira [1♀, BLCU: UCRCENT00251376 (former AEIC specimen)]GoogleMaps  .

Etymology. From Greek spyr meaning “basket and gaster meaning “stomach in reference to the odd basketlike structure of the valvifer.

Discussion. In all other species of Orasema  the valvifer is invariable, being apically rounded with long thin setae covering the surface ( Fig. 33EView FIGURE 33), whereas O. spyrogaster  uniquely has thick cuticular projections (or digits) at the apex giving it a comb-like appearance, as well as having long thin setae covering the surface ( Fig. 34EView FIGURE 34).


American Entomological Institute