Lutnes ornaticornis Cameron 1884
Creators: name: Gibson, Gary A. P.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Eupelmidae
Lutnes
Lutnes ornaticornis

description: Lutnes ornaticornis Cameron
Figs 37–45
Lutnes ornaticornis Cameron, 1884: 125 –126.
Lutnes ornaticornis; Gibson, 1995: 219; figs 461, 462, 464. Compared with L. biguttatus.
Material examined. Type material. Syntype ♀ (BMNH): “Type / V. de Chiriqui, | 25-4000 ft. | Champion. / Lutnes | ornaticornis Cam. type | BCaii 125 [hand written] / B.C.A. Hymen. I. | Lutnes | ornaticornis, Cam. / B.M. TYPE | HYM. | 5.957 / NHMUK010749025”.
The label data given above is based on notes I took April 1984 and images supplied by Natalie Dale-Skey Papilloud (BMNH). The BMNH type is a syntype because Cameron’s original description notes variation in collection altitude as well as for body length and scape and flagellar color pattern, which demonstrates he based the species on more than one specimen, and certainly more than two. It is possible that his specimens represented more than one species and perhaps even more than one genus based on his statement “the number and position of the testaceous joints of the flagellum vary—sometimes it is the eighth to tenth, in other specimens the fourth to sixth”. I did not re-examine the remaining syntype for this study, but it is glued to a broad card point by about the posterior half of its venter with its anterior half extending beyond the point in the direction of the point. A minutien pin extends through its right axilla, which indicates it was originally minutien-mounted but sometime in the past has been remounted. It is uncontorted and mostly complete except both antennae and left hind wing are missing and the left protarsus is glued to the point behind the specimen. A card rectangle is pinned under the point to further protect the specimen.
Additional material examined. Colombia. Mocoa, Narino, 700 m, 2.III.1955, E.I. Schlinger & E.S. Ross (1♀ CASC). Ecuador. NAPO, Res. Ethnica Waorani, 1 km S Onkone Gare Camp, Trans. Ent., 220 m, 00°39'10"S 076°26'W, 220 m, 6.X.1994 (Sta. 2, Lot# 871: 1♀ CNC, CNC Photo 2017-4; 1♀ USNM, CNC Photo 2017-7), 9.X.1994 (Sta. 9, Lot# 928: 1♀ USNM, CNC Photo 2017-5), 10.X.1994 (Sta. 9, Lot# 948: 1♀ USNM), T.L. Erwin et al., Insecticidal fogging of mostly bare green leaves, some with covering of lichenous or bryophytic plants in terre firme forest, Project MAXUS. French Guiana. Montagne des Chevaux, 4°43'0.01"N 52°25'0.12"W, 2.X.2011, S.E. A.G. [Société entomologique Antilles-Guyane] via Y. Braet, MT (1♀ CNC). Réserve du Mont Grand Matoury, Sous-bois fermé, piège vitre, S.E. A.G., 24.VIII.2012 (1♀ AICF), 23. XII.2 0 12 (1♀ AICF). Saül, 3°37’22.08"N 53°12’33.84"W, 7.III.2011, S.E.A.G. via Y. Braet, flight intercept trap (1♀ CNC, CNC Photo 2017- 6). Saül, IX-XI.2010, S.E.A.G (1♀ AICF). Venezuela. Lara Yacambu Nat. Park, 1200 m cloud forest, V.1981, H.K. Townes, MT (1♀ CNC).
Description. FEMALE (habitus: Figs 37, 38). Length = 3.5–4.3 mm. Head (Figs 37–40) sometimes mostly dark reddish-violaceous to blue or purple, though lower face, at least in part, and interocellar triangle usually more greenish, and frons often with more distinct reddish-violaceous to somewhat coppery lusters contrasting with mostly greenish to bluish rest of head. Head in lateral view moderately high-lenticular, about 1.7× as high as long, with frontovertex obtusely to almost right-angled relative to face; malar space about 0.5× eye height. Head in frontal view (Fig. 39) without differentiated ocellocular line between posterior ocellus and inner orbit; mostly punctate-reticulate, though interantennal prominence usually more finely reticulate-rugulose; with dense, whitishtranslucent, lanceolate setae on interantennal prominence and lower face near toruli, and on lower parascrobal region to about level of dorsal margin of torulus except more extensively along carinate margin of parascrobal region, but with longer, brownish hairlike setae on clypeus and lower face lateral of clypeus forming quite distinctly differentiated, much more sparsely setose band above oral margin between malar sulci (Figs 39, 40), and with longer, white, hairlike setae on parascrobal region above lanceolate setae continued onto frontovertex, including short white setae at confluence with occiput; scrobal depression bell-shaped but only about as high as wide, separated dorsally from anterior ocellus by distance similar to POL, not carinate dorsally but carinate lateral margins ventrally obviously recurved toward lower inner orbit lateral to torulus; interorbital distance about 0.4× head width; OOL slightly shorter to slightly longer than, but POL about 3× and LOL about 1.5× MPOD. Labiomaxillary complex yellowish. Eye distinctly setose (Figs 39, 40); about 1.4–1.6× as high as long; height about 1.3–1.6× and length 0.9–1.0× interocular distance, respectively. Antenna (Fig. 38) with scape slightly broadened apically but more or less cylindrical and slightly curved, usually almost entirely yellowish except narrowly brownish ventrobasally and sometimes dorsoapically, but sometimes more extensively brownish, pedicel and flagellum brown except usually fl5–fl8 entirely and sometimes fl4 partly to entirely orangish or orangishbrown, and sometimes orangish funiculars brown ventrally; fl1 transverse with both dorsal and ventral lengths less than width, with dorsal length only about 0.25× dorsal length of pedicel and about 0.3× dorsal length of fl2; fl2 the longest funicular, about 1.7× as long as wide and subsequent funiculars gradually decreasing in length such that at least fl4 slightly longer than wide but at least fl8 slightly transverse; clava slightly more than 2× as long as wide and about as long as combined length of fl8 + fl7 + about apical half of fl6.
Mesosoma (Figs 37, 38) dark with slight greenish to bluish lusters under most angles of light except usually with more distinct blue to purplish luster on propodeum (Fig. 45) and mesoscutal lateral flange and tegula variably dark brown (Fig. 42). Pronotum with white, slender-lanceolate setae posteriorly (Fig. 42); propleuron and prosternum with dark setae. Mesoscutum (Fig. 42) mostly punctate-reticulate except lateral flange more finely meshlike coriaceous-reticulate to transversely strigose, with lateral lobe longitudinally carinate over about posterior half; quite densely though variably setose, sometimes covered almost entirely with dark hairlike setae, though usually with longer and straighter dark hairlike setae anteriorly and shorter, more distinctly curved, whitishtranslucent, slender-lanceolate setae posteriorly (Fig. 42), or with the two different types of setae intermixed. Scutellar-axillar complex (Fig. 42) similarly punctate-reticulate as mesoscutum, and with entirely white setae. Prepectus (Fig. 43) bare, subdivided by vertical line near mid-length. Mesopleurosternum with conspicuous, slender-lanceolate white setae on mesopectus and anteriorly on acropleuron to about level equal with apex of tegula, plus a few dark, hairlike setae dorsally below tegula at junction of mesopectus and acropleuron above white lanceolate setae, some of which usually with converging apices so as to form more or less distinct setal tuft subdorsally (Fig. 43); acropleuron comparatively minutely reticulate-rugulose to punctulate over about anterior two-thirds, particularly mesally, but posterior one-third with much larger reticulations, more umbilicate-punctate. Macropterous (Figs 37, 38). Fore wing (Fig. 41) with ratio of cc: mv: stv: pmv = 5.8–8.3: 2.6–4.0: 1.0: 1.5–2.0; costal cell dorsally densely setose with dark brown hairlike setae except bare along extreme leading margin and extreme apex; basal cell hyaline to slightly infuscate but with uniform dark hairlike setae except usually with some white setae behind extreme base of smv and apically with slender region of white hairlike setae behind smv apically; discal region more distinctly infuscate with dark, broadly lanceolate setae from basal fold to about level of apex of stv, but more hyaline with dark hairlike setae over about apical half except for elongate-slender hyaline region with white setae extending along about apical half of mv to or virtually to base of stv and posteriorly at least half distance to and usually closer to medial fold (mv anterior to hyaline region more distinct because at least paler than elsewhere and sometimes with pale setae), much smaller transverse hyaline region with white setae posterior of medial fold, and posterobasal region with pale hairlike setae continuous with white setae apically in basal cell continuing across basal fold toward posterior hyaline region, but separated from basal cell over about its posterior half by distinct band of dark lanceolate setae on basal fold that continue along posterior margin of disc. Front leg dark brown except usually base of tibia narrowly paler to orangish; tibia at most obscurely concave anteroapically.
Middle leg dark brown except knee whitish and trochantellus and tibia variably broadly more orangish apically; tibia dorsally not carinate. Hind leg dark brown with trochanter, trochantellus, knee, tibia apically, and tarsus variably extensively paler, orangish to whitish. Propodeum (Fig. 45) with medial length about 0.2× length of scutellum; with deep and distinct furrows along foramen converging anteriorly on either side of midline to differentiate short median carina to v-like emarginate anteromedial margin, and transverse, lunate region posteromedially; callar region meshlike coriaceous-reticulate mesal to postspiracular groove and smooth and shiny lateral of groove except along lateral margin within setose region.
Gaster (Figs 37, 38) dark brown or only slightly paler dorsobasally though sometimes Gt6 apically and syntergum paler (Fig. 44) to more orangish; Gt1 smooth and shiny, Gt2 shiny but finely coriaceous, subsequent tergites progressively more distinctly sculptured (Fig. 37), with Gt4 or Gt5–syntergum meshlike granular, the sculptural cells convex and delineated by grooves (Fig. 44); Gt1 bare and Gt2 at most with single line of setae dorsally, but subsequent tergites more extensively setose with white hairlike setae; syntergum obviously transverse, only about one-third as long as Gt6 (Fig. 44).
Distribution. Neotropical: Colombia, Ecuador, French Guiana, Panama, Venezuela.
Remarks. Females of L. ornaticornis are uniquely differentiated by the apical gastral tergites, particularly Gt5, being meshlike granular rather than reticulate, the convex or pustulate-like sculpture (Fig. 44) being delineated by grooves rather than concave and delineated by ridges. Females otherwise most closely resemble those of L. aurantimacula, though they are readily differentiated by the fore wings lacking regions of orangish setae behind the marginal vein (cf. Figs 16, 41). Also, although females of the two species have the same number of usually pale funiculars, these usually are fl5–fl8 for L. ornaticornis (Fig. 38) and fl4–fl7 for L. aurantimacula (Fig. 12). Additionally, female L. ornaticornis have unusually dense lanceolate setae on the interantennal prominence and below the toruli, but hairlike setae on the clypeus so that there are two conspicuously differentiated setose bands across the lower face (Figs 39, 40). Female L aurantimacula have lanceolate setae on the clypeus as well so that distinctly differentiated bands of setae are lacking. Further, L. ornaticornis females uniquely have entirely white setae on the vertex (Fig. 42) rather than having some dark setae dorsally at the junction of the vertex and occiput. Although difficult to quantify accurately and therefore not described, female L. ornaticornis also have the most highly raised lower parascrobal regions above the toruli as well as the shortest scrobal depression relative to separation from the anterior ocellus so that the head more closely approximates the structure of L. afrotropicus. The mesosoma is similar for females of both L. aurantimacula and L. ornaticornis except the prepectus is bare and there are at least a few dark setae dorsally on the mesopleurosternum below the tegula in L. ornaticornis (Fig. 43) as well as in most females the white lanceolate setae below the dark setae forming more or less distinct setal tufts (Fig. 43). Finally, the gaster of L. ornaticornis has its venter entirely dark (cf. Figs 11, 38).
description: Published as part of Gibson, Gary A. P., 2018, Revision of Lutnes Cameron (Hymenoptera: Eupelmidae), pp. 330-356 in Zootaxa 4415 (2) on pages 347-350, DOI: 10.11646/zootaxa.4415.2.5, http://zenodo.org/record/1242004