Messatoporus nigriscapus 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 : 156-157

Messatoporus nigriscapus Santos , sp. nov.

( Figs 72 , 347 )

Female. Fore wing 10.00 mm. HEAD: Mandible densely covered with moderately long hairs; MLW 1.74; MWW 0.35; dorsal tooth in front view projected upwards, much longer than ventral tooth; ventral tooth triangular. MSM 0.27. Clypeus basally convex, apically abruptly flattened, centrally concave; CHW 2.71; CWW 1.08; apical area medially concave, laterally slightly projected, its margin very sharp, raised. Antenna with 22 flagellomeres; flagellum strongly flattened and compressed on apical 0.3; apex of apical flagellomere about as wide as base, not distinctly tapered. Supra-antennal area shiny, scarcely punctate, not striate near antennal sockets, ventrally and around ocelli slightly concave, with slight median 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 glabrous, shiny, impunctate, ventrally with strong wrinkles; epomia moderately strong, complete, short, ending far from dorsal margin of pronotum, after diverging from pronotal collar distinctly curved. Mesoscutum moderately and uniformly convex, subcircular, 1.07 × as long as wide, sparsely pilose, shiny, asperous; notaulus reaching about 0.72 of mesoscutum length, moderately impressed, surface over notaulus not wrinkled; scuto-scutellar groove moderately deep, with distinct longitudinal wrinkles. Subalar ridge weakly projected; epicnemial carina reaching about 0.7 of distance to subalar ridge, more or less uniformly curved; sternaulus complete but weak, strongly sinuous, smooth; scrobe very shallow; mesopleural suture with strong longitudinal wrinkles along entire length. 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 moderately wide, about 0.62 × as long as anterior area of propodeum, impunctate; metapleuron moderately punctate, without transverse wrinkles, dorsally moderately pilose, ventrally densely pilose; juxtacoxal carina represented by very short ridges. Fore tibia distinctly 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: 1.17 × as long as wide, shiny, sparsely pilose; anterior area scarcely punctate; spiracle elliptic, SWL 3.37; anterior transverse carina medially slightly arched forwards. Propodeal wrinkles strong, closely spaced, anteriorly faint at median portion, posteriorly partly complete and partly incomplete, mostly slightly curved or somewhat sinuous; posterior transverse carina faintly suggested as a stronger wrinkle.

WINGS: Fore wing vein 1-Rs+M distinctly sinuous, with bulla placed on basal 0.4; crossvein 1m-cu irregular, limit between 1m-cu and 1-Rs+M clearly traceable; vein 1M+Rs anteriorly straight, posteriorly curved; fore wing crossvein 1 cu-a basad of 1M+Rs by 0.41 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 0.71, pentagonal, about as high as wide, AWH 0.93; 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 tubular, straight. Hind wing vein 1-M forming distinctly obtuse angle with vein Cua; vein 2-Rs entirely tubular, apically weaker, reaching wing margin; HW1C 1.1; vein Cub distinctly convex on posterior half, forming distinctly obtuse angle with vein Cua (basally curved); vein 2-1A reaching 0.83 of distance to posterior wing margin.

METASOMA: First tergite short, about 0.34 × as long as T2–8, strongly depressed, ventrolaterally rounded, dorsally glabrate, laterally moderately pilose; T1LW 3.27; T1WW 1.79; spiracle on 0.51 of its length, slightly prominent; median depression subcircular, distinct; median posterior depression absent; lateral depressions elongate, very shallow; ventrolateral carina absent, but traceable as limit between lateral and ventral portions. T2LW 1.1; T2WW 2.26; thyridium much longer than wide, without small circular depression just behind it; T2–8 smooth between punctures, moderately and uniformly pilose. Ovipositor moderately stout, straight, basally cylindric, apically slightly depressed; dorsal valve with four moderately strong ridges; ventral valve apex with 8 teeth, apical teeth progressively more closely spaced; surface anterior to first tooth not rugulose.

Color. Head, mesosoma and metasoma black with light yellow marks. Head: black; clypeus, mouthparts, supra-clypeal area except small ventral spot and orbital band shortly interrupted at dorsal margin of eye, light yellow (234,205,108); f5–8 entirely white, f4 apically white and f9–15 with dorsal white longitudinal band. Mesosoma: black; anterior 0.2 of collar, posterior 0.6 of dorsal margin of pronotum, subcircular spot on mesoscutum, scutellar carina, scutellum, axillar carinae, postscutellum, tegula, subalar ridge, central mark on mesopleuron somewhat S-shaped, mesosternum almost entirely, dorsal division of metapleuron, transverse sulcus anteriorly, metapleuron except anterior and posterior margins and arc-shaped mark on propodeum, light yellow; fore and mid legs light yellow, brighter apically, except posterior face of fore coxa, sparse marks at mid coxa, basal mark at first fore and mid trochanters, dorsal stripe on femora, both t5 and mid t3-4, black; hind coxa light yellow with two longitudinal stripes, posterior one reaching apical margin; hind first trochanter with basal blackish mark, second trochanter almost entirely black; hind femur deep yellow (219,163,050), dorsal face black. Metasoma: black; anterior 0.5 and posterior 0.2 of T1, light yellow; T1–7 with posterior bright yellow stripes, progressively wider and occupying lateral areas, T8 only laterally yellow; S1–7 yellow, S3–5 with anterior dark brown areas.

Male. Unknown

Comments. Messatoporus nigriscapus is part of a group of four very close species, which apparently form a monophyletic group ( Figs 71–75 ; see Comments under M. compressicornis ). Among these species, M. nigriscapus can be differentiated from M. compressicornis by having hind femur deep yellow, dorsal face black (vs. entirely orange); mandible entirely black (vs. basally yellow); orbital band shortly interrupted at dorsal margin of eye (vs. complete); collar black (vs. yellow); thyridium much longer than wide (vs. about as wide as long); and ovipositor dorsal valve with four moderately strong ridges (vs. five).

It can be isolated from both M. keraiopetalus sp. nov. and M. depressifrons sp. nov. by the orbital band shortly interrupted (vs. complete); mandible entirely black (vs. basally yellow); collar black (vs. yellow); supra-antennal area with slight median carina (vs. median carina indistinct, represented only by a smoother area or depression); median portion of posterior transverse carina of the mesothoracic venter arched forwards (vs. arched backwards); and spiracle of propodeum elliptic, SWL 3.37 (vs. elongate, SWL 4.86–6.25).

Biology. Unknown.

Etymology. From the Latin words nigrum, meaning “black”, and scapus; in reference to the entirely black scape, in contrast to the very close species M. keraiopetalus and M. depressifrons .

Material examined. Holotype ♀ from COSTA RICA, Puntarenas, 1959, CWPalmer ( AMNH). Pinned. Apical third of right antenna, right mid leg apicad to coxae, right hind leg and left hind leg apicad to femur missing; apical half of left antenna broken and re-glued to the specimen.

Distribution. Recorded only from the type locality, in southern Costa Rica ( Fig. 347 ).

Figures

FIGURES 71–75. Lateral view. 71, M. compressicornis*. 72, M. nigriscapus*. 73, M. depressifrons*. 74, M. keraiopetalus. 75, M. arcuatus.

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.