Messatoporus nigriangulatus Santos, 2013

Santos, Bernardo F. & Aguiar, Alexandre P., 2013, <strong> Phylogeny and revision of <em> Messatoporus </ em> Cushman (Hymenoptera, Ichneumonidae, Cryptinae), with descriptions of sixty five new species </ strong>, Zootaxa 3634 (1), pp. 1-284 : 154-155

Messatoporus nigriangulatus Santos , sp. nov.

( Figs 59 , 157 , 346 )

Female. Fore wing 6.88 mm. HEAD: Mandible densely covered with long hairs; MLW 2.09; MWW 0.41; dorsal tooth in front view projected upwards, much longer than ventral tooth; ventral tooth triangular. MSM 0.34. Clypeus slightly and more or less uniformly convex, centrally straight; CHW 2.06; CWW 1.78; apical area medially straight, laterally with distinct triangular lobes, its margin regular, not raised. Antenna with 27 flagellomeres; flagellum uniform; apex of apical flagellomere much narrower than base, distinctly tapered. Supra-antennal area shiny, scarcely punctate, not striate near antennal sockets, ventrally and around ocelli slightly concave, median line distingishable only as a weakly smoother area. Occipital carina dorsally distinctly bell-shaped, fading out at distance about as long as basal width of mandible from the hypostomal carina. Temple and gena narrow, gena regular (as in Fig. 260 ).

THORAX: Pronotum centrally glabrate, moderately pilose at dorsal margin, shiny, impunctate, with strong wrinkles at ventral half of posterior margin; epomia weak, complete, short, ending far from dorsal margin of pronotum, after diverging from pronotal collar distinctly curved. Mesoscutum moderately and uniformly convex, ovoid, 1.3 × as long as wide, anteriorly densely pilose, posteriorly sparsely pilose, shiny, anteriorly densely punctate, posteriorly almost impunctate; notaulus reaching about 0.74 of mesoscutum length, weakly impressed, surface over notaulus not wrinkled; scuto-scutellar groove shallow, without wrinkles. Subalar ridge moderately projected; epicnemial carina reaching about 0.7 of distance to subalar ridge, more or less uniformly curved; sternaulus moderately strong, wide and shallow at posterior 0.25, strongly sinuous, with weak vertical wrinkles; scrobe moderately deep; mesopleural suture ventrally with weak longitudinal wrinkles, wrinkles dorsally vestigial. Mesosternum medially with short transverse wrinkles; median portion of posterior transverse carina of the mesothoracic venter short, distinctly arched forwards. Transverse sulcus at base of propodeum very wide, about 1.2 × as long as anterior area of propodeum, posteriorly with longitudinal wrinkles; metapleuron moderately punctate, posteriorly also weakly rugulose, without transverse wrinkles, dorsally sparsely pilose, ventrally moderately pilose; juxtacoxal carina represented by very short ridges. Fore tibia weakly swollen. Mesal lobe of t4 with 3–4 bristles. Hind coxa foveolate-areolate, interior face rugulose.

PROPODEUM: 1.15 × as long as wide, shiny, sparsely pilose; anterior area scarcely punctate; spiracle elliptic, SWL 2.5; anterior transverse carina medially straight. Propodeal wrinkles anteriorly weak, posteriorly strong, closely spaced, anteriorly complete, posteriorly mostly incomplete and overlapped, anteriorly more or less straight, posteriorly slightly arched forwards; posterior transverse carina entirely absent.

WINGS: Fore wing vein 1-Rs+M distinctly sinuous, with bulla placed on basal 0.25; crossvein 1m-cu more or less uniformly curved, totally continuous with 1-Rs+M; vein 1M+Rs anteriorly straight, posteriorly curved; fore wing crossvein 1 cu-a basad of 1M+Rs by 0.29 of its own length; vein 2Cua 0.31 × as long as crossvein 2cu-a; bulla of crossvein 2m-cu placed mostly on posterior half; cell 1+2Rs small, APH 0.52, subquadratic, about as high as wide, AWH 1.09; crossvein 3r-m fully spectral, 2r-m and 3r-m subparallel, about same length; vein 3-M about as long as 2-M; 4-Rs distinctly sinuous; 4-M spectral, slightly curved backwards. Hind wing vein 1-M forming distinctly obtuse angle with vein Cua; vein 2-Rs tubular, apically spectral, reaching wing margin; HW1C 1.08; vein Cub distinctly convex on posterior half, forming distinctly obtuse angle with vein Cua (not curved); vein 2-1A reaching 0.77 of distance to posterior wing margin.

METASOMA: First tergite moderately long, about 0.42 × as long as T2–8, somewhat depressed, ventrolaterally rounded, dorsally glabrate, laterally sparsely pilose; T1LW 4.64; T1WW 1.1; spiracle on 0.5 of its length, distinctly prominent; median depression absent; lateral and median posterior depressions absent; ventrolateral carina absent, but traceable as limit between lateral and ventral portions. T2LW 1.74; T2WW 2.09; thyridium much longer than wide, without small circular depression just behind it; T2–8 densely punctate and minutely and weakly coriarious, densely and uniformly pilose. OST 0.67; ovipositor slender, slightly sinuous, basally cylindric, apically distinctly depressed; dorsal valve without ridges; ventral valve apex with 9 teeth, apical teeth progressively more closely spaced; surface anterior to first tooth not rugulose.

Color. Head black and whitish, mesosoma black, orange, whitish and pale yellow, metasoma black and pale yellow. Head: black; clypeus, mandible except apex, mouthparts, malar space, supra-clypeal area, scape ventrally and complete orbital band, pale yellow (238,219,156); f8–15 entirely white, f7 with small white mark. Mesosoma: mostly pale yellow, slightly darker than head (229,207,121); mesoscutum except subcircular spot, scuto-scutellar groove, scutellar carina, posterior 0.15 of scutellum, postscutellum, dorsal 0.4 of epicnemium and dorsal margin of mesopleuron, black; ventral 0.6 of epicnemium, transverse sulcus medially, metapleuron and propodeum orange (214,104,038), propodeum darker anteriorly (150,067,036); fore second trochanter, femur ventrally, tibia and t1–4, light fuscous; fore femur dorsally brownish, tibia with dorsal brown mark; t5 blackish; mid coxa, trochanters and femur light orange; mid tibia dorsally whitish, ventrally blackish on basal 0.8; mid tarsus blackish; hind coxa, trochanters and basal 0.6 of femur (dorsally 0.8) bright orange; apical 0.2–0.4 of hind femur, apical 0.75 of tibia and basal 0.3 of t1, blackish; basal 0.25 of hind tibia, apical 0.7 of t1 and t2–5, white. Metasoma: black; T1–7 with posterior whitish stripes; T1 dorsally whitish at anterior 0.5; S1 whitish; S2–6 dark brown, with posterior whitish stripes; T8 laterally whitish.

Male. Unknown.

Comments. Similar to M. maculiscus sp. nov., from which it can be differentiated by having pronotum entirely yellowish (vs. with distinct posterior blackish mark); anterior area of propodeum entirely orange (vs. mostly blackish); transverse sulcus of propodeum very wide, 1.20 × as long as anterior area (vs. moderately wide, 0.62 × as long as anterior area); hind femur blackish on apical 0.4 (vs. entirely orange, though apically darker); and fore wing veins 2r-m and 3r-m subparallel (vs. distinctly convergent).

Biology. Unknown.

Etymology. From the latin words niger, meaning “black”, and angulus, meaning “angle”, “corner”; in reference to the mesopleuron with only the anterior margin blackish.

Material examined. Holotype ♀ from PANAMA, Coclé, El Copé, P.N. Torrijos, 23–30.IX.1999, yellow pans, ASantos ( AEIC). Pinned. Apical two thirds of left antenna missing; otherwise in good shape.

Distribution. Recorded only from the type locality, in Panama ( Fig. 346 ).

Figures

FIGURES 56–60. Lateral view. 56, M. tenuiorbis*. 57, M. maculiscus*. 58, M. pleuriflavus*. 59, M. nigriangularus*. 60, M. elektor*.

FIGURES 153–161. Mesoscutum, dorsal view. 153, M. lissonotus. 154, M. copiosus*. 155, M. pallidus*. 156, M. semialbiventris*. 157, M. nigriangulatus*. 158, M. orientalis*. 159, M. opacus*. 160, M. bimaculatus*. 161, M. jalapa.

FIGURES 345–352. Distribution maps for species of Messatoporus. 345, M. mesosternalis. 346, M. nigriangulatus. 347, M. nigriscapus. 348, M. nigriscutus. 349, M. occidentalis. 350, M. opacus. 351, M. orientalis. 352, M. paeneater.

FIGURES 260–271. 260–261, Gena, lateral. 260, M. longicaudis*. 261, M. compressicornis. 262–264, Antenna. 262, M. tibiator. 263, M. compresscornis. 264, M. antennator, male. 265–266, Hind t4. 265, M. paeneater*. 266, M. nigriscutus*. 267–271, Metasoma and ovipositor. 267, M. opacus*. 268, M. discoidalis. 269, M. longicaudis*. 270, M. convexus. 271, M. townesi.