Orasema caesariata, Burks, Roger A., Mottern, Jason & Heraty, John M., 2015

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 : 525-526

Orasema caesariata n. sp.

urn:lsid:zoobank.org:act:FF3C936C-B788-4F0E-AE4E-D6CC7617FE5D ( Figs 7–10 )

Diagnosis. Face flattened and smooth, lacking a groove or depression between torulus and eye ( Fig. 7 ). Head triangular in frontal view with prominent bulging eyes, and body including eyes with long setae. Petiole laterally expanded near midlength, with one or two dorsal irregular longitudinal carinae ( Fig. 10 ).

Similar to O. reburra based on the setation of the head and body, rugose mesoscutum, and presence of irregular dorsal carinae on the petiole. However, O. reburra has at most minute setae on the eyes, the head is more distinctly subtriangular ( Fig. 27 ), and the petiole is more nearly parallel-sided.

Female. Length, 3.4–3.6 mm. Head and mesosoma metallic bluish green to purple or red; pedicel and anellus pale brown, flagellum dark brown; procoxa yellow, base of meso- and metacoxae dark brown and apex yellow, metatrochanter dark brown medially; petiole metallic blue to purple; gaster brown dorsally with purplish reflections, ventrally pale brown, except anterior region of Ms2 black with metallic luster.

Head triangular with prominent bulging eyes ( Fig. 7 ), 1.5–1.6× as broad as high. Face without depression or groove between torulus and eye, sparsely covered with long hairs; scrobal depression medially with irregular carina bordered laterally by foveate furrow. Eye with long setae. Labrum with 8–10 digits. Palpal formula 2-1. Pedicel as broad as F2; flagellum 2.3× height of head; F2 2.6–3.0× as long as broad, F2 1.1–1.2× as long as F3.

Mesosoma with long setae ( Figs 8, 9 ); mesoscutum with irregular transverse carinae but becoming areolaterugose posteromedially, lateral lobe evenly sculptured. Axilla with oblique carinae; mesoscutellar disc coarsely areolate-rugose, slightly longer than broad, narrowly separated from transscutal articulation by deep fovea; frenum areolate-rugose. Propodeal disc areolate-rugose, median carina lacking; callus smooth, with a few long setae. Metafemur with sparse semi-erect setae. Fore wing 2.6–2.8× as long as broad; stigmal vein 2.0–2.5× as long as broad, perpendicular to anterior margin.

Metasoma with petiole 1.4–1.5× as long as metacoxa ( Fig. 10 ), 2.4–2.6× as long as broad, laterally expanded near midlength, weakly rugose with one or two dorsal longitudinal carinae (sometimes a single longitudinal carina is split, as in Fig. 10 ). Hypopygium with few setae apically. Ovipositor strongly curved cephalad; ventral (1st) valvula with subapical lateral line of 6–8 narrowly spaced blunt teeth; dorsal (2nd) valvula with 8–12 rasp-like annuli meeting along midline.

Male. Length, 3.1–3.3 mm. Similar to female except for following character states: antenna with flagellum 3.5–3.8× head height; F2 3.2–3.9× as long as broad; metasoma with petiole 1.8–1.9× as long as metacoxa, 3.5–3.9× as long as broad. Genitalia: parameres long and narrow, digitus with 5 broadly spaced marginal teeth.

Description of egg. Information from ovarian eggs exposed in gaster of paratype (UCRCENT322671). Similar in form to other Orasema , length of egg body 0.10–0.12 mm, length of egg stalk 0.10–0.11 mm.

Material examined. Holotype. Peru: Huánuco: Monson Valley, Tingo Maria, 750m, 9°17'59"S, 75°59'05"W, 10.x.1954, E.I. Schlinger & E.S. Ross [1♀, CASC: UCRCENT00417462]. Paratypes. Peru: Huánuco: same data as holotype [2♀, CASC: UCRCENT00417461, CASC: UCRCENT00417463]. Huannes, Tingo Maria, 670m, 9°17'43"S, 75°59'51"W, 10.x.1946, J.C. Pallister [1♂, AMNH: UCRCENT00238127]. Monson Valley, Tingo Maria, 620m, 9°17'59"S, 75°59'05"W, 5–12.x.1964, C.C. Porter [1♂ 1♀, CASC: UCRCENT00322671, MCZ: UCRCENT00318633]. Cusco: Villa Carmen Biological Station, trail 8, 560m, 12°54'01.3"S, 71°24'25.6"W, 2.viii.2014, J. Mottern, rainforest, sweep [1♂, UCRC: UCRCENT00434574].

Etymology. From the Latin caesariatus meaning “covered with hair”; referring to the complete covering of the face and eyes with long setae.

Figures

FIGURES 7 – 10. Orasema caesariata. 7 – 9, paratype female (UCRCENT 00322671): 7, head, anterior; 8, mesosoma, dorsal; 9, mesosoma, lateral. 10, holotype female (UCRCENT 00417462): petiole, dorsal.

FIGURES 26 – 29. Orasema reburra. 26 – 28, holotype female (UCRCENT 00316397): 26, habitus, lateral; 27, head, anterior; 28, mesosoma, dorsal. 29, paratype female (UCRCENT 00092181): petiole, dorsal.