Orasema masonicki, 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 : 68-70

Orasema masonicki n. sp.

urn:lsid:zoobank.org:act:7F6A453B-2948-4839-BA71-42FF6ADFB39A

( Fig. 37)

Diagnosis. Distinguished from O. heacoxi by features provided in the key.

Description. Female. Length 1.9–2.2 mm ( Fig. 37A). Color. Scape brown. Mandible brown. Femora brown with strong iridescence. Gaster dark brown with strong blue-green iridescence. Head ( Fig. 37B). Head in frontal

view elongate; HW:HH = 0.7–1.0; longitudinal groove between eye and torulus absent; IOD:EH = 1.0–1.1; MS:EH = 0.3–0.6; malar depression weakly impressed adjacent to mouth; epistomal sulcus distinct and sharply defined. Occiput deeply emarginate in dorsal view. Pedicel small and globose. FL:HH = 0.6–0.9; F2L:F2W = 1.0–1.5, F2L:F3L = 1.0 ( Fig. 37D). Mesosoma ( Fig. 37C, F, G). ML:MH = 1.4–1.6. Mesoscutal midlobe reticulate. Scutoscutellar sulcus broad, narrowly separated from transscutal articulation; frenum reticulate; axillula reticulate. Mesepisternum reticulate laterally, weakly reticulate ventrally. Upper mesepimeron weakly reticulate; lower mesepimeron reticulate; transepimeral sulcus weakly impressed. Metepisternum laterally reticulate. HCL:HCW = 1.2–1.8, reticulate; HFL:HFW = 4.6–6.3. FWL:FWW = 2.2–3.9, FWL:ML = 1.9–2.4. Metasoma. PTL:PTW = 2.5–3.4, PTL:HCL = 1.1–1.7, lateral margin rounded, ventral sulcus present with margins narrowly separated. Apical setae of hypopygium with several setae on each side of midline.

Male. Length 2–2.1 mm. HW:HH = 0.9–1.1. Scape brown; FL:HH = 0.9–1.2; F2L:F2W = 0.8–1.4 ( Fig. 37E). Tibiae yellow. PTL:PTW = 5.5–7.5, PTL:HCL = 2.2–3.3.

Hosts. Unknown.

Plant associates. Unknown.

Distribution ( Fig. 35). Costa Rica: AL, GU, HE. Collected January–May.

Material examined. Holotype. COSTA RICA. Guanacaste: Est. Pitilla, 9 km S Santa Cecilia , P.N. Guanacaste, 700m, 10°59’28”N, 85°25’39”W, iii.1995, P. Rios, #4359 [♀, deposited in INBIO: INBIOCRI02242095].

Paratypes. COSTA RICA. Alajuela: Sect. San Ramon de Dos Rios , 620m, 10°52’54”N, 85°24’41”W, 16.i- 3.ii.1995, F.A. Quesada, #4400 [1³, INBIO: INBIOCRI02192938]; 20.ii-5.iii.1995, #4401 [4³ 1?, INBIO: IN- BIOCRI02138790 , INBIOCRI02138802 , INBIOCRI02138811 , INBIOCRI02138832 , INBIOCRI02138835 ]; C. Cano, #4396 [15³ 4♀, INBIO: INBIOCRI02133093, INBIOCRI02133101–02, INBIOCRI02133144, INBIOC- RI02133155–56, INBIOCRI02133159, INBIOCRI02133164–66, INBIOCRI02133183, INBIOCRI02133195, IN- BIOCRI02133204 , INBIOCRI02133209 , INBIOCRI02133213–15 , INBIOCRI02133225 , INBIOCRI02133227 ]; 20.ii-3.iii.1995, #4398 [10³ 8♀, INBIO: INBIOCRI02174676–77, INBIOCRI02174679–80, INBIOCRI02174682, INBIOCRI02174686–87, INBIOCRI02174691, INBIOCRI02174714, INBIOCRI02174730, INBIOCRI02174755, INBIOCRI02174760, INBIOCRI02174776, INBIOCRI02174783, INBIOCRI02174787–88, INBIOCRI02174793, INBIOCRI02174800]; 11-15.iv.1994, C. Moraga, #2840 [1³, INBIO: INBIOCRI01780190]; 13-28.iii.1994, K. Tay- lor, #2763[4³ 1♀, INBIO:INBIOCRI01712287, INBIOCRI01712554, INBIOCRI01712730, INBIOCRI01712733, INBIOCRI01760375] . Guanacaste: Est. Pitilla, 9 km S Santa Cecilia, P.N. Guanacaste, 700m, 10°59’28”N, 85°25’39”W, 2-19.iii.1992, P. Rios [1♀, INBIO: INBIOCRI00420518]. Sector Las Pailas , 800m, 10°46’31”N, 85°20’59”W, 12.iv-3.v.1995, K. Taylor, #4810 [2³ 1♀, INBIO: INBIOCRI02425608, INBIOCRI02425621, IN- BIOCRI02425633 ]; 16-30.iii.1995, #4811 [8³, INBIO: INBIOCRI02403459, INBIOCRI02403595, INBIOC- RI02403602–03, INBIOCRI02403778, INBIOCRI02403840, INBIOCRI02403851, INBIOCRI02403878] . Heredia: Send. Terciopelo, Est. Magsaysay, P.N. Braulio Carrillo, 220m, 10°24’2”N, 84°02’53”W, 1991, malaise trap [1³, INBIO: INBIOCRI01194079] .

Etymology. Named in honor of Paul Masonick, an entomologist who has helped to collect specimens of Orasema , including those of the heacoxi group.

Unplaced Orasema species

( Figs 38–44)

Discussion. Several species could not be confidently placed to species group, especially those lacking molecular phylogenetic data. Placing these taxa into species groups described herein would make the species group key more difficult to use, so we prefer to treat them as unplaced until more data can be collected.