Messatoporus nigriscutus 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 : 157-159

Messatoporus nigriscutus Santos , sp. nov.

( Figs 2 , 8 , 13 , 16 , 50 , 139 , 174 , 218 , 266 , 285 , 348 )

Female. Fore wing 13.08 mm. HEAD: Mandible densely covered with moderately long hairs; MLW 2.21; MWW 0.51; dorsal tooth in front view projected upwards, much longer than ventral tooth; ventral tooth somewhat rhomboid. MSM 0.29. Clypeus basally convex, apically abruptly flattened, centrally straight; CHW 2.41; CWW 1.71; apical area medially straight, laterally slightly projected, its margin very sharp, raised. Antenna with 24 flagellomeres; flagellum uniform; apex of apical flagellomere about as wide as base, not distinctly tapered. Supraantennal area shiny, scarcely punctate, not striate near antennal sockets, ventrally distinctly concave, dorsally with very weak median line, ventrally fading. Occipital carina uniformly curved, fading out at distance shorter than basal width of mandible from the hypostomal carina, meeting hypostomal carina far from mandible base. Temple and gena narrow, gena regular (as in Fig. 260 ).

THORAX: Pronotum moderately pilose, shiny, finely punctate at dorsal margin and collar, centrally weakly rugulose, weakly striate restricted to ventral corner; epomia weak, distinct only after diverging from pronotal collar, short, ending far from dorsal margin of pronotum, after diverging from pronotal collar distinctly curved. Mesoscutum strongly and uniformly convex, ovoid, 1.33 × as long as wide, densely covered with short hairs, shiny, densely punctate; notaulus reaching about 0.74 of mesoscutum length, moderately impressed, surface over notaulus with weak and short transverse wrinkles; scuto-scutellar groove deep, without wrinkles. Subalar ridge weakly projected; epicnemial carina reaching about 0.7 of distance to subalar ridge, irregular; sternaulus complete and strong, wider on posterior apex, weakly sinuous, with weak vertical wrinkles; 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 indistinct. Transverse sulcus at base of propodeum very wide, about 0.75 × as long as anterior area of propodeum, impunctate; metapleuron punctaterugulose, without transverse wrinkles, 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 about their own diameter.

PROPODEUM: 1.26 × as long as wide, shiny, densely pilose; anterior area densely punctate; spiracle elongate, SWL 5.33; anterior transverse carina medially straight. Propodeal wrinkles anteriorly very close and moderately strong, posteriorly stronger and more widely spaced, central wrinkles complete, anterior and posterior ones incomplete and overlapped, mostly slightly curved or somewhat sinuous; posterior transverse carina entirely absent.

WINGS: Fore wing vein 1-Rs+M distinctly sinuous, with bulla placed around its midlength; crossvein 1m-cu irregular, limit between 1m-cu and 1-Rs+M clearly traceable; vein 1M+Rs anteriorly irregular, posteriorly curved; fore wing crossvein 1 cu-a basad of 1M+Rs by 0.49 of its own length; vein 2Cua 0.34 × as long as crossvein 2cu-a; bulla of crossvein 2m-cu placed on midlength; cell 1+2Rs small, APH 0.66, pentagonal, distinctly wider than high, AWH 1.24; crossvein 3r-m partially spectral, 2r-m and 3r-m subparallel, about same length; vein 3-M distinctly shorter than 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 0.99; vein Cub distinctly convex on posterior half, forming distinctly obtuse angle with vein Cua (basally curved); vein 2-1A reaching 0.99 of distance to posterior wing margin.

METASOMA: First tergite moderately long, about 0.41 × as long as T2–8, approximately cylindrical, ventrolaterally rounded, dorsally glabrate, laterally densely pilose; T1LW 4.17; T1WW 1.7; spiracle on 0.52 of its length, distinctly prominent; median depression elongate, very shallow; lateral and median posterior depressions absent; ventrolateral carina absent. T2LW 1.47; T2WW 1.98; thyridium longer than wide, without small circular depression just behind it; T2–8 minutely coriarious, moderately and uniformly pilose except glabrate posterodorsal area in T2–3. OST 1.59; ovipositor moderately stout, slightly upcurved, basally cylindric, apically slightly depressed; dorsal valve with five moderately strong ridges; ventral valve apex with 11 teeth, apical teeth progressively more closely spaced; surface anterior to first tooth rugulose.

Color. Head and metasoma black with whitish marks, metasoma mostly black and dark orange. Head: black; clypeus, mouthparts, supra-clypeal area except small ventral mark and narrow orbital band with two short interruptions at supra-antennal area dorsal margin of eye, pale yellow (235,205,133); f6–10 entirely white, f11 partially white. Mesosoma: black; scutellar carina, lateral portion of scutellum, axillar carinae, tegula, subalar ridge, anterior margin of epicnemium dorsally, dorsal 0.3 of dorsal division of metapleuron, transverse sulcus medially and small spot over propodeal crest, pale yellow (226,192,095); ventral 0.6 of epicnemium and mesopleuron, hypoepimeron and mesosternum, deep orange (201,091,047), except black mark over anterior 0.4 of sternaulus; ventral 0.7 of dorsal division of metapleuron, metapleuron and posterior spot surrounding propodeal crest, dark orange; all coxae, fore and mid femora, dark orange, except fore femur dark orange, sparse marks at fore coxa, dorsal narrow stripe on basal 0.8 of fore femur and ventral stripe on apical 0.6 of mid femur, brownish; fore tibia and tarsus, whitish; mid and hind tibiae and tarsi, bright yellow (231,181,070); hind trochanter sparsly marked with dark orange and black; hind femur black. Metasoma: black; T1–8 with posterior and lateral whitish stripes; S1–7 whitish.

Male. Fore wing 10.06–12.71 mm long. Very similar to female, except for the following: antenna with 30 flagellomeres; scape ventrally light brown; white band at flagellum distinctly only dorsally; orbital band complete, though much narrower near dorsal margin of eye, very wide at gena; pronotum smaller, with dorsal margin anteriorly slightly concave; fore and mid coxae, trochanters and femora without distinct dark marks; apical stripe on T1 very narrow.

Variation. Fore wing 11.38–13.08 mm long. Orbital band sometimes not interrupted at supra-antennal area, at gena very narrow to moderately wide; ventral mark at supra-clypeal area sometimes indistinct; vertical wrinkles on propodeum sometimes strong; posterior area of propodeum medially dark brown to black; fore trochanters and femuithr sometimes deep yellow; mid and hind tibiae and tarsi sometimes light yellow or whitish; posterior whitish stripes on T1–8 sometimes almost indistinct; S3–6 sometimes with lateral dark brown marks; orange areas at mesosoma varying from bright (218,112,044) to dark orange (182,077,049). Specimens from Paraná and Santa Catarina usually with less extensive black marks at mesosoma, showing some or all of the following variations: epicnemium and mesopleuron sometimes entirely orange; propodeum sometimes almost entirely orange, black marks restricted to the borders of anterior area and small median spot posterior to anterior transverse carina; stripes at fore and mid femora sometimes indistinct.

Comments. Similar to M. albiaterartus sp. nov., from which it can be isolated mainly by having anterior area and part of posterior area of propodeum black (vs. entirely orange); pronotum entirely black (vs. collar pale yellow or whitish); mesopleuron dorsally black (vs. orange); orbital band widely interrupted near dorsal margin of eye (vs. complete); and hind tibia bright yellow (vs. mostly black).

M. nigriscutus can also be mistaken with the most extensively orange specimens of M. transversostriatus , particularly because both species have generally large size ( M. nigriscutus 11.38–13.08 mm; M. transversostriatus 14.69–16.66 mm) and occur in sympatry along southern and southeastern Brazil. However, M. nigriscutus can be isolated from M. transversostriatus by having pronotum, mesoscutum and anterior area of propodeum entirely black (vs. with whitish or pale yellow marks); orbital band widely interrupted (vs. complete); epomia distinct only after diverging from collar (vs. complete); notaulus smooth (vs. with distinct transverse wrinkles); and anterior transverse carina of propodeum medially straight (vs. slightly arched forwards).

Biology. Unknown.

Etymology. From the Latin words nigrum, meaning “black”, and scutum, meaning “shield”; in reference to the entirely black mesoscutum.

Material examined. 14 ♀, 7 ♂♂. Holotype ♀ from BRAZIL, Espírito Santo, Domingos Martins, Pico do Eldorado , Pt. B 1, XI–XII.2004, Malaise trap, MTTavares et al ( UFES). Mounted on black triangle point. Left mid leg apicad to femur missing; otherwise in good shape.

Paratypes: 1 ♂ from BRAZIL, Espírito Santo, Domingos Martins, Pico do Eldorado Pt. B4, 3–10.XII.2004 , Malaise trap, MTTavares et al.; 1 ♀, same data except Santa Maria de Jetibá , Fazenda Clarindo Krïger, Pt. T 8, 29.XI–6.XII.2002 ( UFES) . 1 ♀ from BRAZIL, Paraná, Colombo , Embrapa, Br 476, 9.III.1987 , Malaise trap, PROFAUPAR; 2 ♀, same data except Ponta Grossa , Reserva IAPAR Br 376, 1.XII.1986 ; 1 ♀, same data except 17.XI.1986 ; 1 ♀, same data except 29.XII.1986 ; 1 ♀, same data except 4.V.1987 ; 1 ♂, same data except Telêmaco Borba , Reserva Samuel Klabin, 3.XI.1986 ; 1 ♀, same data except 13.IV.1987 ; 1 ♀, same data except 16.II.1987 ; 1 ♂, same data except 2.II.1987 ; 1 ♀, same data except 30.III.1987 ( DZUP) . 1 ♀ from BRAZIL, Paraná, Campina Grande, nr. Curitiba, 19.II.1966 , Townes & Townes. 1 ♀ from BRAZIL, Santa Catarina, Nova Teutônia , 300–500 m, XI.1968 , FPlaumann; 1 ♂, same data except I.1968 ; 1 ♀, same data except 12.III.1954 ( AEIC) . 1 ♂, same data except 19.II.1938 ( BMNH) . 1 ♀ 1 ♂, same data except XII.1967 ; 1 ♂, same data except II.1968 ( CNCI) .

Distribution. Atlantic Forest in southern and southeastern Brazil ( Fig. 348 ).

Figures

FIGURES 2–4. Terms for structures used in the present work. 2, Messatoporus nigriscutus. head, frontal view; aac, apical area of the clypeus; clp, clypeus; cma, clypeus maximum width; cmi, clypeus minimum width; clh, clypeus height; sca, supra-clypeal area; saa, supra-antennal area. 3, M. maculiscus; mdl, mandible length 4, M. orientalis; mls, malar space; mbw, mandible basal width; gen, gena.

FIGURES 6–9. Terms for structures used in the present work. 6, Messatoporus copiosus, dorsal view; teg, tegula; msc, mesoscutum; msl, mesoscutum length; msw, mesoscutum width; nl, notaulus; scc, scutellar carina; ssg, scuto-scutellar groove; sct, scutellum; axc1, first axillar carina; axc2, second axillar carina; psct, postscutellum. 7, M. orientalis, first metasomal tergite; tas, tergite length anterior to spiracle; tps, tergite length posterior to spiracle; dlc, dorsolateral carina. 8, M. nigriscutus, T1, dorsal view; t1l, length of T1; t1mw, minimum width of T1; t1xw, maximum width of T1. 9, M. amazonensis, T2, dorsal view; same codes of T1.

FIGURES 10–13. 10, M. convexus, propodeum, dorsal view; tsp, transverse sulcus of propodeum; pl, propodeum length; pw, propodeum width; amp, anterior margin of propodeum; aap, anterior area of propodeum; ps, propodeal spiracle; acp, anterior transverse carina of propodeum; pap, posterior area of propodeum. 11, M. orientalis; metasoma; T1–8, tergites 1–8; S1–8, sternites 1–8; spc, spiracle of first terhite; mdd, median depression of first tergite; trd, thiridium. 12, M. opacus, metasoma and ovipositor; ovp, ovipositor; psol, “pre-sheath” ovipositor length; os, ovipositor sheath. 13, M. nigriscutus, ovipositor tip; dvv, dorsal valve; vvv, ventral valve.

FIGURES 14–16. 14, Messatoporus jalapa, fore wing, codes for veins as interpreted from Sharkey and Wharton (1997); cell 1+2Rs in detail at bottom, left. 15, M. euryoikos, hind wing, codes for veins; vein 1-R1 in detail at right top. 16, M. nigriscutus, propodeal spiracle, lateral view; psl, propodeal spiracle length; psw, propodeal spiracle width.

FIGURES 46–50. Lateral view. 46, M. paralissonotus. 47, M. latissulcus*. 48, M. convexus*. 49, M. albiaterartus*. 50, M. nigriscutus.

FIGURES 139–152. Head, frontal view. 139, M. nigriscutus*. 140, M. transversostriatus. 141, M. maculiscus. 142, M. laevilatus. 143, M. elektor*. 144, M. versicolor*. 52. 145, M. opacus*. 146, M. semialbiventris*. 147, M. lunatus*. 148, M. bimaculatus*. 149, M. andinus*. 150, M. bennetti*. 151, M. teutonicus*. 152, M. paeneater*.

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 218–223. Hind leg. 218, M. nigriscutus. 219, M. bennetti*. 220, M. atlanticus. 221, M. lissonotus. 222, M. paeneater*. 223, M. orientalis.

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.

FIGURES 279–288. Ovipositor tip. 279, M. discoidalis. 280, M. paradoxus*. 281, M. tibiator. 282, M. citreocephalus*. 283, M. teutonicus*. 284, M. compressicornis. 285, M. nigriscutus*. 286, M. bennetti*. 287, M. semiaurantigaster*. 288, M. titans*.

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.