Macreupelmus erwini, Gibson, Gary A. P., 2016

Gibson, Gary A. P., 2016, Revision of the Neotropical genus Macreupelmus Ashmead (Hymenoptera: Chalcidoidea: Eupelmidae), Zootaxa 4161 (1), pp. 81-115 : 102-104

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Macreupelmus erwini

n. sp.

Macreupelmus erwini n. sp.

Figs 72–86 View FIGURES 72 – 80 View FIGURES 81 – 86

Type material. Holotype ♀ (USNM). ECUADOR: Napo, Transect Ent. | 1 km S. Onkone Gare Camp | Reserva Etnica Waorani | Onkone Gare Camp , 220 m | 00º39'10"S, 76º26'00"W / T.L. Erwin et al. | Lot # 1146, fogging | terre firme forest / HOLOTYPE ♀ | Macreupelmus | erwini | Gibson GoogleMaps . Holotype point-mounted by meso- and metacoxae; entire; uncontorted.

Paratypes. ECUADOR. Same data as holotype except—insecticidal fogging of mostly bare green leaves, some with covering of lichenous or bryophytic plants in terre firme forest, Project MAXUS, at Trans 4, Sta. 3, Lot 924 (1 CNC, CNC Photo 2016-11), Sta. 5, Lot 944 (1 USNM, CNC Photo 2016-12). Orellana, Tiputini Biodiversity Station , 00º37'55"S 76º08'39"W, 216m, 22.X.1998, T.L. Erwin et al., insecticidal fogging of mostly bare green leaves, some with covering of lichenous or bryophytic plants in terre firme forest, Lot # 1973, Transect #8 (1 CNC, 1 USNM) GoogleMaps . FRENCH GUIANA. Montagnes Tortue , 4º15.007'N, 52º21.512'W, 9.I.2003, V. Soon (1 AICF) GoogleMaps . PERU. Madre de Dios, Rio Tambopata Res., 30 km (air) SW Pto. [Puerto] Maldonado , 12º50'S, 69º17'W, 290m, 12.XI.1983, T.L. Erwin et al. colls., Smithsonian Institution Canopy Fogging Project, 20/02/47 (1 USNM) GoogleMaps .

Etymology. Named in honor of Terry Erwin, Smithsonian Institution, Washington, DC, USA, who collected the holotype of this species as well as specimens of other species through his innovative collecting technique of insecticidal fogging, which has resulted in the collection of numerous eupelmids over the years.

Description. FEMALE (habitus: Figs 72, 77 View FIGURES 72 – 80 ). Head ( Fig. 73 View FIGURES 72 – 80 ) with lower face variably extensively green but usually with at least some reddish-violaceous to coppery lusters between clypeus and malar sulcus; interantennal prominence variably extensively green to blue or purple; gena extensively reddish-violaceous to partly purple or blue behind outer orbit, the region contiguous with or almost contiguous with outer orbit but tapered toward malar sulcus ( Fig. 79 View FIGURES 72 – 80 ); scrobal depression variably green to partly blue or purple at least to dorsal limit of interantennal prominence, though scrobes usually more reddish-violaceous ventrally near torulus and depression above level of interantennal prominence darker, more similar in color to frons mesally; parascrobal region variably extensively green to blue or purple ventrally and narrowly along inner orbit through frons, the region darker with reddishviolaceous to partly purple luster dorsomesally along with upper part of scrobal depression and frons ( Fig. 78 View FIGURES 72 – 80 ) to slightly behind posterior ocelli, except narrowly along inner orbits and sometimes within ocellar triangle; vertex and occiput mostly green to blue; vertex with dark setae mesally between inner orbits. Head with interorbital distance about 0.28–0.33× head width; OOL: POL: LOL: MPOD = 0.5–0.6: 1.3–1.6: 1.2–1.5: 1.0; distance between anterior ocellus and inner orbit about 1.5–1.6× MAOD; anterior ocellus about 1.0–2.0× MAOD from dorsal extent of scrobal depression, with sulcus extending between ventral margin to within depression dorsally; frons ( Fig. 78 View FIGURES 72 – 80 ) micropunctate-reticulate to reticulate-rugulose between posterior ocelli and scrobal depression compared to more uniformly meshlike reticulate within ocellar triangle and on vertex. Antenna ( Fig. 74 View FIGURES 72 – 80 ) dark brown except extreme apex of scape and most of clava pale, the clava dorsally or basally somewhat darker brownish; scape robust-subcylindrical, about 4.6–5× as long as medial width, and in lateral view apex of pedicel extending obviously beyond apical ventral margin when at right angle to scape ( Fig. 74 View FIGURES 72 – 80 ).

Mesoscutum ( Fig. 80 View FIGURES 72 – 80 ) not carinately margined mediolongitudinally; scutellar-axillar complex with axillae and scutellum similarly meshlike reticulate, though reticulations on scutellum aligned more longitudinally. Front leg dark brown except tarsus usually lighter, more orangish. Middle leg dark brown except trochantellus with dorsal surface at least lighter brown if not white, and ventral surface apically whitish and dark basally, and femur apically yellowish; femur with denser tuft of long white setae on posterior surface mesally ( Fig. 83 View FIGURES 81 – 86 ); tibia with 5–7 pegs in straight or only slightly offset row ( Fig. 84 View FIGURES 81 – 86 ). Hind leg dark brown except apex of coxa, trochanter and trochantellus white, femur with more yellowish to orangish region extending over about apical one-third to one-quarter dorsally, the region usually not quite extending to dorsoapical or apicolateral margins ( Fig. 82 View FIGURES 81 – 86 ), and tibia with short, similarly yellowish to orangish region basally. Fore wing ( Fig. 75 View FIGURES 72 – 80 ) with hyaline band with white setae extending posteriorly from submarginal vein basal to parastigma along basal fold and onto mediocubital fold basally ( Figs 75, 76 View FIGURES 72 – 80 ); disc with hyaline region behind marginal vein tapered posterobasally, and with hyaline region with white setae along posterior margin ( Fig. 76 View FIGURES 72 – 80 ); costal cell dorsally with at least two rows of setae along length ( Fig. 81 View FIGURES 81 – 86 ). Propodeum ( Fig. 85 View FIGURES 81 – 86 ) appearing medially elongate, with ∩-like incurved posterior margin superficially distant from anterior margin, though anterior margin medially deeply incised with contiguous to subcontiguous margins extending almost to more finely sculptured and lighter colored, transversely lunate region along foramen, the plical region otherwise reticulate-rugulose.

Gaster mostly brown dorsally, but under some angles of light with purple to reddish-violaceous lusters basally on Gt1 and laterally on Gt1–Gt5, with Gt6 and syntergum darker with variably distinct bluish to purple lusters; Gt6 almost completely, uniformly granular except sometimes near basal margin with more transversely imbricate to reticulate-imbricate ( Fig. 86 View FIGURES 81 – 86 ). Ovipositor sheaths at least 0.9× metatibia length, but always slightly shorter than metatibia ( Fig. 72 View FIGURES 72 – 80 ).

Distribution (Map 1B). Ecuador, French Guiana, Peru.

Remarks. Although the propodeal plical region superficially appears long medially, the anterior margin is actually deeply incised with contiguous or only narrowly separated margins so as often to appear to have a median sulcus anterior to a posterior lunate region along the foramen ( Fig. 85 View FIGURES 81 – 86 ). Except for the fore wing having a hyaline region with white setae extending from the submarginal vein at the boundary between the more hyaline basal cell and infuscate disc ( Figs 75, 76 View FIGURES 72 – 80 ), females of M. erwini closely resemble those of M. granulosus because of a similar superficially long propodeal plical region (cf. Figs 85 View FIGURES 81 – 86 , 94 View FIGURES 87 – 95 ), a granular Gt6 (cf. Figs 86 View FIGURES 81 – 86 , 95 View FIGURES 87 – 95 ), quite an extensive reddish-violaceous to purple or blue region on the gena behind the outer orbit (cf. Figs 79 View FIGURES 72 – 80 , 88 View FIGURES 87 – 95 ), and a more cylindrical scape so that the apex of the pedicel extends for a short, though quite obvious distance beyond the ventral margin of the scape when held at a right angle to the scape (cf. Figs 74 View FIGURES 72 – 80 , 88 View FIGURES 87 – 95 ). This latter feature is also similar to that of M. auranticrus ( Fig. 21 View FIGURES 15 – 23 , insert).


Canadian National Collection of Insects, Arachnids, and Nematodes


Smithsonian Institution, National Museum of Natural History