Messatoporus tenuiorbis 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 : 182-183

Messatoporus tenuiorbis Santos , sp. nov.

( Figs 56 , 175 , 363 )

Female. Fore wing 7.57 mm. HEAD: Mandible densely covered with long hairs; MLW 2.16; MWW 0.34; dorsal tooth in front view projected upwards, much longer than ventral tooth; ventral tooth triangular. MSM 0.34. Clypeus basally evenly convex, apically gradually flattened, centrally straight; CHW 2.83; CWW 2.97; apical area medially concave, laterally with distinct triangular lobes, its margin regular, not raised. Flagellum uniform; apex of apical flagellomere much narrower than base, distinctly tapered. Supra-antennal area mat, coriarious, weakly rugulose near antennal sockets, ventrally and around ocelli distinctly concave, medially with a distinct depression but without a distinct line. Occipital carina uniformly curved, fading out at distance about as long as basal width of mandible from the hypostomal carina. Temple and gena moderately wide, gena regular (as in Fig. 260 ).

THORAX: Pronotum centrally glabrate, moderately pilose at dorsal margin, shiny, densely punctate, with moderately strong striation restricted to ventral corner; epomia weak, complete, short, ending far from dorsal margin of pronotum, after diverging from pronotal collar distinctly curved. Mesoscutum moderately and uniformly convex, ovoid, 1.32 × as long as wide, densely covered with short hairs, shiny, densely punctulate; notaulus reaching about 0.65 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 weakly projected; epicnemial carina reaching about 0.7 of distance to subalar ridge, more or less uniformly curved; sternaulus moderately strong, wider on posterior apex, strongly sinuous, with vestigial vertical wrinkles; scrobe moderately deep; mesopleural suture with weak longitudinal wrinkles along entire length. Mesosternum medially with short transverse wrinkles; median portion of posterior transverse carina of the mesothoracic venter indistinct. Transverse sulcus at base of propodeum moderately wide, about 0.56 × as long as anterior area of propodeum, laterally with weak longitudinal wrinkles, medially not wrinkled; metapleuron coriarious-rugulose, without transverse wrinkles, dorsally moderately pilose, ventrally densely pilose; juxtacoxal carina absent. Fore tibia distinctly swollen. Mesal lobe of t4 with 3–4 bristles. Hind coxa entirely coriarious.

PROPODEUM: 1.06 × as long as wide, shiny, densely pilose; anterior area densely punctate; spiracle elliptic, SWL 3.14; anterior transverse carina medially straight. Propodeal wrinkles anteriorly very close and moderately strong, posteriorly stronger and more widely spaced, mostly complete, mostly slightly curved or somewhat sinuous; posterior transverse carina entirely absent.

WINGS: Fore wing vein 1-Rs+M distinctly sinuous, with bulla placed on basal 0.4; crossvein 1m-cu more or less uniformly curved, limit between 1m-cu and 1-Rs+M more or less traceable; vein 1M+Rs anteriorly straight, posteriorly weakly curved; fore wing crossvein 1 cu-a basad of 1M+Rs by 0.36 of its own length; vein 2Cua 0.6 × as long as crossvein 2cu-a; bulla of crossvein 2m-cu placed mostly on posterior half; cell 1+2Rs of moderate size, APH 0.85, pentagonal, distinctly higher than wide, AWH 0.79; crossvein 3r-m fully spectral, 2r-m and 3r-m distinctly convergent, about same length; vein 3-M distinctly shorter than 2-M; 4-Rs distinctly sinuous; 4-M semispectral, irregular. Hind wing vein 1-M forming distinctly obtuse angle with vein Cua; vein 2-Rs tubular, apically spectral, reaching wing margin; HW1C 1.51; vein Cub distinctly convex on posterior half, forming straight angle with Cua; vein 2-1A reaching 0.81 of distance to posterior wing margin.

METASOMA: First tergite moderately long, about 0.4 × as long as T2–8, somewhat depressed, ventrolaterally angled, dorsally glabrate, laterally densely pilose; T1LW 4.84; T1WW 1.71; spiracle on 0.47 of its length, slightly prominent; median depression absent; lateral and median posterior depressions absent; ventrolateral carina absent. T2LW 2.04; T2WW 2.18; thyridium much longer than wide, without small circular depression just behind it; T2–8 minutely coriarious. OST 0.65; ovipositor moderately stout, straight, basally cylindric, apically distinctly depressed; dorsal valve without ridges; ventral valve apex with 9 teeth, widely spaced; surface anterior to first tooth not rugulose.

Color. Head black and pale yellow, mesosoma black, orange and pale yellow, metasoma black and pale yellow. Head: black; mandible, mouthparts, clypeus, supra-clypeal area except lateral blackish marks, ventral spot at scape and orbital band shortly interrupted at dorsal margin, pale yellow (232,224,151); white band at flagellum starting at f8. Mesosoma: black; dorsal 0.5 of pronotal collar, sparse marks at propleuron, central spot on mesoscutum, scutellar carina, scutellum, tegula, subalar ridge, dorsal division of metapleuron and sublateral, subquadratic posterior spots on propodeum, pale yellow; ventral margin of mesopleuron, most of mesosternum, metapleural triangle, metapleuron and T-shaped mark at posterior area of propodeum, orange (225,148,057); postscutellum, transverse sulcus of propodeum medially, anterior area and somewhat subcircular anterior mark at posterior area, dark brown; fore leg whitish, fore coxa with brownish mesal spot, femur ventrally with orange longitudinal stripe, t5 blackish; mid and hind coxae and trochanters orange, hind second trochanter marked with brownish; mid and hind femora brown; mid tibia whitish, ventrally with brownish longitudinal stripe; basal 0.4 of hind tibia and apical 0.75 of t1, whitish; apical 0.6 of tibia and basal 0.25 of t1, brown. Mesosoma: black; T1 orange, dorsally marked with brownish, posterior 0.15 pale yellow; T2–7 with posterior and lateral pale yellow stripes.

Male. Unknown.

Comments. Similar to M. maculiscus sp. nov., from which it can be differentiated by the mesopleuron and mesosternum mostly blackish (vs. mesopleuron and mesosternum mostly orange, mesopleuron with central yellow mark); dorsal margin of pronotum black (vs. yellow); fore coxa distinctly swollen (vs. not swollen); fore wing vein 3-M distinctly shorter than 2-M (vs. 2-M about as long as 3-M); and pronotum densely punctate (vs. impunctate).

Biology. Reared from a nest of unidentified Pompilidae (labeled as “ Psammocharidae ”).

Etymology. From the Latin words tenuis, meaning “thin”, and orbis, meaning “circle” or “ring”; in reference to its narrow orbital band.

Material examined. Holotype ♀ from BRAZIL, Minas Gerais, Belo Horizonte, Estação Ecológica UFMG, 13.I.1993, HRPimenta, “67A/(08.01.93) // ex. Psammocharidae ” ( UFES). Pinned. Badly broken; tip of left antenna, apical two thirds of right antenna, left fore leg apicad to coxa, both mid tarsi, left hind tarsus, right t2–5 and right hind wing missing; hind legs apicad to trochanter and metasoma broken and re-glued to the specimen; S3–4 with a large perforation.

Distribution. Recorded only from the type locality, in southeastern Brazil ( Fig. 363 ).

Figures

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

FIGURES 171–179. Propodeum, dorsal view. 171, M. paraguayensis. 172, M. pallidus*. 173, M. fulvator. 174, M. nigriscutus*. 175, M. tenuirobis*. 176, M. elektor*. 177, M. versicolor*. 178, M. maculiscus. 179, M. opacus*.

FIGURES 361–368. Distribution maps for species of Messatoporus. 361, M. semiaurantigaster. 362, M. subalaris. 363, M. tenuiorbis. 364, M. tenuissimus. 365, M. terebrator. 366, M. teutonicus. 367, M. tibiator. 368, M. titans.

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.