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

publication ID

https://doi.org/ 10.11646/zootaxa.4888.1.1

publication LSID




persistent identifier


treatment provided by


scientific name

Orasema masonicki

sp. nov.

Orasema masonicki n. sp.


( Fig. 37 View FIGURE 37 )

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

Description. Female. Length 1.9–2.2 mm ( Fig. 37A View FIGURE 37 ). Color. Scape brown. Mandible brown. Femora brown with strong iridescence. Gaster dark brown with strong blue-green iridescence. Head ( Fig. 37B View FIGURE 37 ). 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 View FIGURE 37 ). Mesosoma ( Fig. 37C, F, G View FIGURE 37 ). 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 View FIGURE 37 ). Tibiae yellow. PTL:PTW = 5.5–7.5, PTL:HCL = 2.2–3.3.

Hosts. Unknown.

Plant associates. Unknown.

Distribution ( Fig. 35 View FIGURE 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]. GoogleMaps

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] GoogleMaps . 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 GoogleMaps [1♀, INBIO: INBIOCRI00420518]. Sector Las Pailas , 800m, 10°46’31”N, 85°20’59”W, 12.iv-3.v.1995, K. Taylor, #4810 GoogleMaps [2³ 1♀, INBIO: INBIOCRI02425608, INBIOCRI02425621, IN-BIOCRI02425633 ]; 16-30.iii.1995, #4811 GoogleMaps [8³, INBIO: INBIOCRI02403459, INBIOCRI02403595, INBIOC-RI02403602–03, INBIOCRI02403778, INBIOCRI02403840, INBIOCRI02403851, INBIOCRI02403878] GoogleMaps . Heredia: Send. Terciopelo, Est. Magsaysay, P.N. Braulio Carrillo, 220m, 10°24’2”N, 84°02’53”W, 1991, malaise trap [1³, INBIO: INBIOCRI01194079] GoogleMaps .

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 View FIGURE 38 View FIGURE 39 View FIGURE 40 View FIGURE 41 View FIGURE 42 View FIGURE 43 View FIGURE 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.













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