Messatoporus opacus Santos & Aguiar 2013, sp. nov.
Creators: name: Santos, Bernardo F.
name: Aguiar, Alexandre P.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Messatoporus
Messatoporus opacus

description: Messatoporus opacus Santos, sp. nov.   
(Figs 12, 61, 145, 159, 179, 224, 267, 350)  
 Female. Fore wing 7.35 mm. HEAD: Mandible with moderately sparse and long hairs; MLW 1.81; MWW 0.3; dorsal tooth in front view projected upwards, much longer than ventral tooth; ventral tooth triangular. MSM 0.22. Clypeus basally convex, apically abruptly flattened, centrally concave; CHW 2.46; CWW 1.73; apical area medially straight, laterally with distinct triangular lobes, its margin regular, not raised. Antenna with 24 flagellomeres; flagellum uniform; apex of apical flagellomere much narrower than base, distinctly tapered. Supraantennal area mat, with moderately dense punctation, distinctly striate near antennal sockets, ventrally distinctly concave, median line distingishable only as a weakly smoother area. Occipital carina uniformly curved, fading out at distance shorter than basal width of mandible from the hypostomal carina. Temple and gena narrow, gena regular (as in Fig. 260).   
THORAX: Pronotum glabrate, mat, impunctate, ventrally moderately striate; epomia very weak, complete, short, ending far from dorsal margin of pronotum, after diverging from pronotal collar approximately straight. Mesoscutum moderately convex, flattened posteriorly, subcircular, 1.19 × as long as wide, densely covered with short hairs, mat, densely punctulate; notaulus reaching about 0.92 of mesoscutum length, moderately impressed, surface over notaulus with weak and short transverse wrinkles; scuto-scutellar groove moderately deep, with vestigial longitudinal wrinkles. Subalar ridge moderately projected; epicnemial carina reaching about 0.7 of distance to subalar ridge, irregular; sternaulus moderately strong, wide and shallow at posterior 0.25, strongly sinuous, with vestigial vertical wrinkles; scrobe very shallow; mesopleural suture with vestigial longitudinal wrinkles. Mesosternum medially without transverse wrinkles or depressions; median portion of posterior transverse carina of the mesothoracic venter short, straight. Transverse sulcus at base of propodeum moderately wide, about 0.64 × as long as anterior area of propodeum, impunctate; metapleuron densely and finely punctulate, without transverse wrinkles, dorsally moderately pilose, ventrally densely pilose; juxtacoxal carina absent. Fore tibia weakly swollen. Mesal lobe of t4 with a distinct cluster of stout bristles. Hind coxa with moderately strong punctures separated by more than their own diameter.  
PROPODEUM: 1.11 × as long as wide, mat, moderately pilose; anterior area punctate-coriarious; spiracle elliptic, SWL 2.8; anterior transverse carina medially slightly arched forwards. Propodeal wrinkles moderately strong, very closely spaced, mostly complete, mostly slightly curved or somewhat sinuous (and anteriorly with two converging areas fore and backwards); posterior transverse carina entirely absent.  
WINGS: Fore wing vein 1-Rs+M distinctly sinuous, with bulla placed on basal 0.25; crossvein 1m-cu irregular, limit between 1m-cu and 1-Rs+M more or less traceable; vein 1M+Rs anteriorly straight, posteriorly curved; fore wing crossvein 1 cu-a basad of 1M+Rs by 0.31 of its own length; vein 2Cua 0.76 × as long as crossvein 2cu-a; bulla of crossvein 2m-cu placed mostly on posterior half; cell 1+2Rs small, APH 0.66, pentagonal, about as high as wide, AWH 0.99; crossvein 3r-m fully spectral, 2r-m and 3r-m distinctly convergent, about same length; vein 3-M about as long as 2-M; 4-Rs distinctly sinuous; 4-M tubular, slightly curved backwards. Hind wing vein 1-M forming straight angle with vein Cua; vein 2-Rs entirely tubular, apically weaker, reaching wing margin; HW1C 1.25; vein Cub distinctly convex on posterior half, forming distinctly obtuse angle with vein Cua (not curved); vein 2-1A reaching 0.91 of distance to posterior wing margin.  
METASOMA: First tergite moderately long, about 0.41 × as long as T2–8, somewhat depressed, ventrolaterally angled, dorsally sparsely pilose, laterally moderately pilose; T1LW 4.4; T1WW 1.48; spiracle on 0.49 of its length, slightly prominent; median depression elongate, very shallow; lateral and median posterior depressions absent; ventrolateral carina weak, medially interrupted. T2LW 1.41; T2WW 2.49; thyridium longer than wide, without small circular depression just behind it; T2–8 covered with small, shallow foveae, densely and uniformly pilose. OST 0.61; ovipositor slender, slightly sinuous, basally cylindric, apically distinctly depressed; dorsal valve without ridges; ventral valve apex with 6 teeth, 1st, 2nd and 3th widely spaced; surface anterior to first tooth rugulose.  
 Color. Head and mesosoma, black with pale yellow marks, metasoma dark brown with whitish stripes. Head: black; clypeus, mandible except apex, mouthparts, malar space, supra-clypeal area, scape ventrally and complete orbital band, pale yellow (225,205,128); scape dorsally and pedicel, dark brown; f10–15 entirely white, f9 and f16 partially white. Mesosoma: black; collar mostly pale yellow except posterior black mark covering 0.4 of its surface; propleuron, subcircular spot on mesoscutum, scutellar carina, scutellum, axillar carinae, postscutellum, tegula subalar ridge, central mark covering about 0.8 of mesopleuron, most of mesosternum, dorsal division of metapleuron, most of transverse sulcus, metapleuron except anterior 0.2 and arc-shaped mark on propodeum, pale yellow; anterior 0.2 of metapleuron light orange; fore leg pale yellow except dorsal stripe at femur, orange, and t5, blackish; mid coxa whitish with sparse brown marks; mid trochanters sparsely marked with blackish and orange; mid femur light orange, ventrally brown; mid tibia pale yellow with ventral brown stripe on basal 0.7; mid t1 light fuscous, t2–4 whitish, t5 blackish; hind coxa mostly dark orange (189,087,054), posteriorly yellowish, medially with black mark on basal 0.7; hind trochanters dark orange, hind femur black with dorsal face dark orange on basal 0.6; basal 0.4 of hind tibia, apical 0.7 of t1, t2–4 and basal 0.5 of t5, whitish; apical 0.6 of hind tibia, basal 0.3 of t1 and apical 0.5 of t5, blackish. Metasoma: mostly dark brown (099,059,045); dorsal face of T1 whitish (231,222,167) at anterior 0.5 and posterior 0.2, medially blackish; S1 whitish; T2–8 and S2–7 with posterior whitish stripes.   
 Male. Unknown.   
 Variation. Fore wing 7.49–8.03 mm long. Antenna with 24–27 flagellomeres; hind femur sometimes almost completely orange, only apical 0.25 black; apical 0.5 of hind t1 sometimes blackish; blackish mark at hind coxa sometimes very weak.   
 Comments. Very similar to some specimens of M. discoidalis, from which it can be differentiated by orbital band narrow at dorsal margin of eye (vs. wide); postscutellum pale yellow (vs. black); posterior blackish spot on propodeum weak (vs. strong); posterior transverse carina of propodeum entirely absent; (vs. distinct as very weak sublateral crests); clypeus centrally concave (vs. straight); supra-antennal area, pronotum and mesoscutum mat (vs. shiny); ovipositor shorter, OST 0.61 (vs. 0.83–0.90), its ventral valve with six teeth (vs. nine to eleven); and supraantennal area distinctly striate near antennal sockets (vs. not striate).   
 Biology. Unknown.   
 Etymology. From the Latin opacus, meaning “shady”, “dim”; in reference to the mat supra-antennal area, pronotum and mesoscutum, as opposed to most species in which those areas are shiny.   
 Material examined. 5 ♀. Holotype ♀ from BRAZIL, Espírito Santo, Santa Maria de Jetibá, Fazenda Clarindo Kruger, Pt. B 8, 29.XI–6.XII.2002, Malaise trap, MTTavares et al. (UFES). Mounted on triangle point. In good shape.   
 Paratypes: 1 ♀ from BRAZIL, Espírito Santo, Domingos Martins, Pico do Eldorado, Pt. B1, 3–10.XII.2004, Malaise trap, MTTavares et al .; 1 ♀, same data except Pt. T 7, 26.XI–3.XII.2004; 1 ♀, same data except Santa Maria de Jetibá, Fazenda Clarindo Kruger, Pt. B 6, 29.XI–6.XII.2002 (UFES). 1 ♀ from BRAZIL, Minas Gerais, Santa Bárbara, Serra do Caraça, I.1970, FMOliveira (AEIC).   
 Distribution. Atlantic Forest highlands in southeastern Brazil (Fig. 350).
description: Published as part of Santos, Bernardo F. & Aguiar, Alexandre P., 2013,  Phylogeny and revision of  Messatoporus  Cushman (Hymenoptera, Ichneumonidae, Cryptinae), with descriptions of sixty five new species , pp. 1-284 in Zootaxa 3634 (1) on pages 161-163, DOI: 10.11646/zootaxa.3634.1.1, http://zenodo.org/record/5262081