Orasema johnsoni, 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 : 61-63

publication ID

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

publication LSID




persistent identifier


treatment provided by


scientific name

Orasema johnsoni

sp. nov.

Orasema johnsoni n. sp.


( Fig. 33 View FIGURE 33 )

Diagnosis. Distinguished from O. spyrogaster by features given in the key.

Description. Female. Length 2.1–2.9 mm ( Fig. 33A View FIGURE 33 ). Color. Scape pale brown; flagellum brown. Fore coxa brown proximally, yellow distally; Mid and hind coxae brown with iridescence. Head ( Fig. 33B View FIGURE 33 ). HW:HH = 1.2– 1.3; face smooth to weakly coriaceous; longitudinal groove between eye and torulus present, small; eyes densely setose, IOD:EH = 1.5–1.7; MS:EH = 0.6–0.8; malar depression weakly impressed between mouth and eye margin. Mandibular formula not observed. Temples present, rounded. Flagellum with 7 or 8 funiculars (first and second funicular partially fused on lateral side of one antenna for one specimen; second and third partially fused medially on both antennae of second specimen), FL:HH = 1.3–1.5; anellus stout, about twice as broad as long; F2L:F2W = 1.6–2.0, F2L:F3L = 0.6–1.3; following funiculars subequal in length, equal in width ( Fig. 33D View FIGURE 33 ). Mesosoma ( Fig. 33C, F View FIGURE 33 ). ML:MH = 1.5–1.7. Mesoscutal midlobe transversely costate; notauli deep. Scutoscutellar sulcus broad; frenal line present as a shallow impression; axillular sulcus distinct and foveate. Propodeal disc flat ( Fig. 33G View FIGURE 33 ). Prepectus weakly rugose to smooth. Mesepisternum weakly rugose laterally, smooth ventrally, broadly rounded anterior to mid coxa. HCL:HCW = 1.6–1.9; HFL:HFW = 4.3–5.0. FWL:FWW = 2.5–2.7, FWL:ML = 2.0–2.2; basal area bare; speculum, costal cell, and wing disc densely setose. Hind wing costal cell with only 1 or 2 irregular rows of setae. Metasoma: PTL:PTW = 1.6–2.0, PTL:HCL = 0.9–1.0, lateral margin with longitudinal carina continuous with basal flange. Antecostal sulcus foveate; acrosternite posteriorly angulate.

Male. Unknown.

Hosts. Unknown.

Plant associates. Unknown.

Distribution ( Fig. 32 View FIGURE 32 ). Argentina: BA; Brazil: SP; Uruguay: TA. Collected in February, November.

Material examined. Holotype. URUGUAY. Tacuaremb : 40 km NW Tacuarembo, 200-300m, 31 ° 29’45”S, 56 ° 18’8”W, 2-9.ii.1963, J.K. Bouseman [♀, deposited in AMNH: UCRCENT00238022] GoogleMaps . Paratypes. ARGENTI-NA. Buenos Aires: San Isidro , 34 ° 28’15”S, 58 ° 31’43”W, iv.1958, J. Daguerra [1♀, USNM: UCRCENT00248388] GoogleMaps . BRAZIL. São Paulo: Anhembi , 455m, 22 ° 42’6”S, 48 ° 10’9”W, 12.xi.2012, E.N.L. Ferreira, Malaise [1♀, DEFS: UCRCENT00439199] GoogleMaps .

Etymology. Named in honor of James (Ding) Johnson, entomologist and Orasema collector.













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