Macreupelmus nigrispina, 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 : 109-111

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Macreupelmus nigrispina

n. sp.

Macreupelmus nigrispina n. sp.

Figs 106–115 View FIGURES 106 – 115

Type material. Holotype ♀ (USNM). ECUADOR: NAPO, Res. Ethnica | Waorani, 1 km S Onkone Gare | Camp , Transect Ent., 21 June 1994 | 220m, 00º39'10"S 076º26'W | T.L. Erwin, et al. / insecticidal fogging of mostly bare | green leaves, some with covering | of lichenous or bryophytic plants in | terre firme forest At 7 x-trans. | 73m mark Project MAXUS Lot 697 / HOLOTYPE ♀ | Macreupelmus | nigrispina | Gibson GoogleMaps . Holotype point-mounted by sternum; entire; uncontorted.

Paratypes. BOLIVIA. La Paz, Heath River Wildlife Centre, ~ 21 km SSW Puerto Heath, 12°40' 68°42'W, 3– 5.V.2007, Paiero & Kitts, treefall, yellow pan trap, debu00286407 (1 UGIC) . ECUADOR. Same data as holotype except— 10.X.1994, At Trans 4, Sta. 4, Lot 943 (1 USNM) ; 21.VI.1994, At 9 x-trans., 89m mark, Lot 719 (1 CNC). Napo, Yasuni Nat. Pk. Biol. Sta., 06ºS 76.39ºW, 18–26.V.1996, P. Hibbs (1 CNC, CNC Photo 2016-18) . FRENCH GUIANA. RN [Réserve Naturelle] Nourages, Saut Pararé , 4.VII.2010, S.E. A.G. [Société entomologique Antilles- Guyane] via Y. Braet, MT (1 CNC, CNC Photo 2026-16) . PERU. Madre de Dios, Rio Tambopata Res. , 30 km (air) SW Pto. Maldonado, 290m, 12º50'S 69º17'W, 7.III.1984, Smithsonian Inst. Canopy Fogging Project, T.L. Erwin et al. colls, 02/02/082 (1 USNM, CNC Photo 2016-17) GoogleMaps . SURINAME. Raleighvallen N.P., Fuengo Is., I.1985, A. Finnamore (1 CNC, CNC Photo 2016-19).

Etymology. From the Latin words niger (black) and spina (thorn) in reference to the black mesotibial spur, one of the diagnostic features that differentiates females from those of M. aurantispina .

Description. FEMALE (habitus: Fig. 106 View FIGURES 106 – 115 ). Head with face variably extensively green ventrally, but usually with at least some reddish-violaceous to purple or somewhat coppery lusters on one or more of interantennal prominence ventrally, clypeus, and lower face; interantennal prominence dorsally and/or scrobal depression often at least partly purple to blue or with some reddish-violaceous luster; parascrobal region usually green dorsally but variably green to blue or purple ventrally; frons comparatively dark reddish-violaceous to level somewhat behind posterior ocelli or variably extensively and distinctly greenish along inner orbits ( Fig. 113 View FIGURES 106 – 115 ); vertex and occiput mostly green to blue; gena usually mostly green or with some blue to purple luster behind outer orbit ( Fig. 112 View FIGURES 106 – 115 ), but sometimes with small coppery to reddish-violaceous region apically adjacent to malar sulcus; vertex with dark setae mesally between inner orbits. Head with interorbital distance about 0.2–0.23× head width; OOL: POL: LOL: MPOD = 0.1–0.25: 0.55–0.75: 0.9–1.1: 1.0; distance between anterior ocellus and inner orbit about 0.75–0.9× MAOD; frons with anterior ocellus about 0.9–1.0× MAOD from dorsal limit of scrobal depression and with sulcus extending from anterior ocellus to within depression dorsally; frons ( Fig. 113 View FIGURES 106 – 115 ) distinctly roughened, micropunctatereticulate to reticulate-rugulose between posterior ocelli and scrobal depression compared to more uniformly meshlike reticulate vertex. Antenna ( Fig. 112 View FIGURES 106 – 115 ) dark brown except extreme apex of scape usually and apical two clavomeres with micropilose sensory regions paler; scape robust-compressed, about 3–3.2× as long as medial width, and in lateral view apex of pedicel extending to ventral margin when at right angle to scape ( Fig. 112 View FIGURES 106 – 115 ).

Mesoscutum distinctly carinate mediolongitudinally from posterior of anteromedial lobe through about anterior half of posteromedial depressed region; scutellar-axillar complex with axillae and scutellum similarly coarsely meshlike reticulate but reticulations on scutellum aligned more longitudinally. Front leg dark brown except tarsus sometimes paler, more orangish. Middle leg sometimes entirely dark brown except femur apically, though usually trochantellus also variably paler to white except ventrobasally; posterior surface uniformly setose with comparatively long white setae over about apical half ( Fig. 110 View FIGURES 106 – 115 ); tibia with 4–6 pegs in straight or only slightly offset row ( Fig. 111 View FIGURES 106 – 115 ). Hind leg dark except apex of coxa and trochanter and trochantellus white, femur with subapical white region only about as long as high and not extending completely to either dorsoapical or apicolateral margins ( Fig. 109 View FIGURES 106 – 115 ), tibia with white region basally and tarsus sometimes with apical tarsomeres paler, more orangish-brown. Fore wing with dark setae continuously through hyaline basal cell onto infuscate basal part of disc, without any whitish setae on basal or mediocubital folds ( Fig. 107 View FIGURES 106 – 115 ); disc with hyaline region behind marginal vein tapered posterobasally, and with entirely dark setae within somewhat more hyaline region along posterior margin ( Fig. 107 View FIGURES 106 – 115 ); costal cell dorsally densely setose apically in front of parastigma and often basally, but either broadly bare medially ( Fig. 108 View FIGURES 106 – 115 ) or at most with comparatively sparse, irregular row of setae along length. Propodeum ( Fig. 114 View FIGURES 106 – 115 ) with foramen broadly ∩- incurved to transverse or shallowly incurved anterior margin so plical region sublinear medially, and in posterior view foramen raised into slender, vertical, shiny flange; plical region otherwise evident as tiny, transverse-triangular, concave region on either side of foramen lateral to callus.

Gaster mostly dark brown dorsally, but under some angles of light with purple to reddish-violaceous lusters laterally on Gt1–Gt4, Gt5 extensively blue to purple or partly reddish-violaceous laterally and usually dorsoapically, Gt6 blue to purple at least basally though sometimes more greenish apically, and syntergum usually with at least bluish to green luster ( Fig. 115 View FIGURES 106 – 115 ); Gt6 shallowly meshlike reticulate to imbricate ( Fig. 115 View FIGURES 106 – 115 ). Ovipositor sheaths obviously longer than metatibia, about 1.3–1.5× metatibia length.

Distribution (Map 1A). Bolivia, Ecuador, French Guiana, Peru, Suriname.

Remarks. Females of M. nigrispina form a species trio along with M. aurantispina and M. crassicornis , as discussed under M. aurantispina . Females of M. nigrispina have the least developed plical region of the three species, the propodeal foramen being incurved completely to the anterior margin of the propodeum so that this is sublinear medially and the posterior surface of the foramen is vertically raised into a slender, shiny, lunate band ( Fig. 114 View FIGURES 106 – 115 ). Females of the other two species have at least a very short, horizontal plical region ( Figs 26 View FIGURES 24 – 33 , 58 View FIGURES 52 – 62 ).


Smithsonian Institution, National Museum of Natural History


Canadian National Collection of Insects, Arachnids, and Nematodes