Orasema peraltai Baker & Heraty 2020
Creators: name: Baker, Austin J.
name: Heraty, John M.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Eucharitidae
Orasema
Orasema peraltai

description: Orasema peraltai species group
(Figs 29–31)
Diagnosis. Recognized by the following combination of characters: antenna with 7 funiculars (Figs 30D, E, 31F), occiput strongly curved such that in dorsal view the head is crescent shaped (Fig. 31C), face appearing thinner and more elongate than most Orasema, which is indicated by the IOD:HH (generally <0.7 compared to most other species groups tending to be>0.7), postgena converging (Fig. 31D), mesoscutal midlobe costate to costate-reticulate, and mesosoma relatively elongate, which is indicated by the MSL:MSH (generally>1.6 compared to most other species groups tending to be <1.6).
Description. Female. Length 2.3–4.2 mm. Color. Scape yellow; flagellum brown. Mandible pale brown; maxilla and labium pale brown to yellow. Tibiae yellow. Wing venation pale brown. Gaster brown with iridescence.
Head. Head in frontal view elongate. Face costate; scrobal depression deep, laterally rounded, with transverse striae; longitudinal groove between eye and torulus absent; eyes sparsely setose; supraclypeal area about as long as broad, shorter than clypeus; clypeus smooth; epistomal sulcus distinct; anterior tentorial pit strongly impressed; anteclypeus distinct, broadly rounded. Labrum with 4 digits. Mandibular formula 3:2. Occiput imbricate, deeply emarginate in dorsal view, dorsal margin abrupt. Scape not reaching median ocellus. Pedicel small and globose. Flagellum with 7 funiculars; anellus disc-shaped; following funiculars subequal in length, equal in width. Mesosoma. Mesoscutal lateral lobe smooth and shining; notauli deep. Axilla dorsally flat, on same plane as mesoscutellum; scutoscutellar sulcus narrowly separated from transscutal articulation; axillula areolate. Propodeal disc flat, areolate, occasionally with irregular median carina; callus with several long setae. Propleuron convex, coriaceous. Prepectus areolate-reticulate. Mesepisternum reticulate laterally, smooth ventrally, straight anterior to mid coxa; postpectal carina weak. Upper mesepimeron smooth; lower mesepimeron weakly reticulate; transepimeral sulcus distinct. Metepisternum weakly reticulate. Hind coxa reticulate. Fore wing basal area and speculum bare, costal cell and wing disc densely setose; marginal fringe relatively long; submarginal vein with several long setae; marginal vein pilose; stigmal vein slightly longer than broad, slightly angled toward wing apex. Metasoma. Petiole cylindrical, linear in profile, lateral margin rounded, ventral sulcus present with margins broadly separated. Antecostal sulcus foveate; acrosternite posteriorly rounded; apical setae of hypopygium present, minute.
Male. Length 2.1–2.7 mm. (Known only for O. chrysozona).
Phylogenetics. The peraltai group is placed sister to the clade containing the coloradensis -, sixaolae -, and monstrosa groups (Baker et al. 2020). Specimens sampled include one O. peraltai (designated “ Orasema _DF1_ ARG_AE_D4205”), and two O. chrysozona (designated “ Orasema _DF2_ARG_AE_D4885” and “ Orasema _DF3_ ARG_AE_D4884”). The decision to include “DF2” (UCRCENT00436599) and “DF3” (UCRCENT00169577) into the same species was partially the result of a small molecular distance between the two specimens when compared to other well-sampled species (e.g. O. coloradensis and O. sixaolae), despite these specimens having a large difference in body size.
Key to species of the Orasema peraltai species group
1) Head and mesosoma generally bright iridescent green (Fig. 31A); femora all pale yellow (Fig. 31A); notauli and scutoscutellar sulcus with small, shallow punctures (Fig. 31G) (widespread Neotropical)...................... Orasema peraltai n. sp.
- Head and mesosoma generally darker iridescent green (Fig. 30A); femora with a medial dark patch (Fig. 30A); notauli and scutoscutellar sulcus with larger, more irregular, deep punctures (Fig. 30F) (widespread Neotropical).................................................................................................. Orasema chrysozona n. sp.
description: Published as part of Baker, Austin J. & Heraty, John M., 2020, The New World ant parasitoid genus Orasema (Hymenoptera: Eucharitidae), pp. 1-84 in Zootaxa 4888 (1) on page 56, DOI: 10.11646/zootaxa.4888.1.1, http://zenodo.org/record/4297699