Orasema festiva (Fabricius)

Burks, Roger A., Mottern, Jason & Heraty, John M., 2015, Revision of the Orasema festiva species group (Hymenoptera: Chalcidoidea: Eucharitidae), Zootaxa 3972 (4), pp. 521-534 : 530-532

Orasema festiva (Fabricius)

urn:lsid:zoobank.org:act:9158E6C1-5171-4A6C-BBC1-2DC2DF6156AD ( Figs 22–25 )

Eucharis festiva Fabricius, 1804: 157 .

Orasema festiva ; combination by Kirby 1886: 29; Heraty 2002: 52 (taxonomy).

Diagnosis. Face flattened and smooth, with very short setae, and with a strongly impressed longitudinal groove between torulus and eye. Mesoscutal midlobe transversely costate, lateral lobe strigate ( Fig. 23 ). Petiole without a dorsal carina, smooth and parallel-sided ( Fig. 24 ).

Similar to O. alvarengai , which has a more finely strigate midlobe and a laterally expanded petiole.

Female. Length, 3.4–4.5 mm. Head and mesosoma metallic bluish green to purple; pedicel and anellus pale brown, flagellum dark brown; coxae yellow, metatrochanters dark brown medially; petiole black with metallic luster; gaster dorsally dark brown with metallic luster, ventrally pale brown without metallic luster, except anterior region of Ms2 black with metallic luster.

Head triangular, 1.5× as long as broad ( Fig. 22 ). Face with broad depression enclosing longitudinal groove lateral to torulus, smooth and glossy with sparse setae; scrobal depression medially with a broad flat median carina bordered laterally by narrow foveate furrow. Eye bare. Labrum with 8 digits. Palpal formula 3-2. Pedicel as broad as F2; flagellum 2.0–2.1× height of head; F2 2.2–2.4× as long as broad, F2 1.1–1.2× as long as F3.

Mesosoma ( Fig. 23 ). Mesoscutum with midlobe transversely costate and lateral lobe strigate with patch of fine sculpture near its center, dorsally with minute setae. Axilla obliquely strigate; mesoscutellar disc areolate-rugose, as long as broad, broadly separated from transscutal articulation at base by deep fovea; frenum areolate-rugose anteriorly. Propodeal disc areolate-rugose with irregular median longitudinal carina; callus smooth, with a few tiny setae. Fore wing 2.6× as long as broad; stigmal vein 2.0–2.5× as long as broad, slightly angled to anterior margin.

Metasoma with petiole 1.5–1.6× as long as metacoxa, 4.0× as long as broad, parallel-sided in dorsal view, dorsally smooth, without longitudinal dorsal carina ( Fig. 24 ). Hypopygium with few minute setae apically. Ovipositor weakly curved cephalad; ventral (1st) valvula with subapical lateral line of 6–8 blunt teeth; dorsal (2nd) valvula with 8–11 rasp-like annuli meeting along midline.

Male. Unknown.

Type material examined. Lectotype. “ TYPE, E: festiva , ex Am: mer: Schmidt. LECTOTYPE, Eucharis festiva, Fabricius, 1804 , Det: Heraty” [♀, ZMUC: zmuc00241186, images of specimen and labels available from ZMUC online database].

Additional material examined. BRAZIL: Mato Grosso: [no locality], 7.iii.1968, O.W. Richards, R.S.& R.G.S. Exped., gallery forest [1♀, BMNH: UCRCENT00239435; homotype established by Heraty]; Barra do Tapirapé, 180m, 10°40'00"S, 50°33'00"W, 10.xii.1962, B. Malkin [1♀, CASC: UCRCENT00417464].

Figures

FIGURES 22 – 25. Orasema festiva. Female (UCRCENT 00417464): 22, head, anterior; 23, mesosoma, dorsal; 24, petiole, dorsal; 25, metasoma, ventral, acs = antecostal sulcus.