Messatoporus amplithorax 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 amplithorax

description: Messatoporus amplithorax Santos, sp. nov.   
(Figs 68, 187, 253, 294)  
 Female. Fore wing 10.11 mm. HEAD: Mandible densely covered with moderately long hairs; MLW 1.59; MWW 0.47; dorsal tooth in front view projected upwards, much longer than ventral tooth; ventral tooth triangular. MSM 0.33. Clypeus basally convex, apically abruptly flattened, centrally concave; CHW 2.59; CWW 2.29; apical area medially concave, 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. Supra-antennal area shiny, scarcely punctate, not striate near antennal sockets, ventrally and around ocelli distinctly concave, with slight median line. Occipital carina uniformly curved, apically very faint, meeting hypostomal carina far from mandible base. Temple and gena moderately wide, gena somewhat swollen and projected (as in Fig. 261).   
THORAX: Pronotum sparsely pilose, shiny, scarcely punctate, ventrally moderately striate; epomia moderately strong, complete, short, ending far from dorsal margin of pronotum, after diverging from pronotal collar distinctly curved. Mesoscutum moderately convex, flattened posteriorly, ovoid, 1.29 × as long as wide, anteriorly densely pilose, posteriorly sparsely pilose, shiny, anteriorly densely foveolate, posteriorly scarcely punctate; notaulus reaching about 0.74 of mesoscutum length, moderately impressed, surface over notaulus with weak and short transverse wrinkles; scuto-scutellar groove moderately deep, with distinct longitudinal wrinkles. Subalar ridge weakly projected; epicnemial carina reaching about 0.85 of distance to subalar ridge, distinctly sinuous; sternaulus complete and strong, wider on posterior apex, strongly 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 short and almost indistinct, straight. Transverse sulcus at base of propodeum very wide, about 0.72 × as long as anterior area of propodeum, medially with very weak transverse striation; metapleuron moderately punctate, without transverse wrinkles, dorsally moderately pilose, ventrally densely pilose; juxtacoxal carina absent. 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: 1.16 × as long as wide, shiny, moderately pilose; anterior area moderately punctate; spiracle elongate, SWL 5.00; anterior transverse carina medially straight. Propodeal wrinkles strong, closely 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 around its midlength; crossvein 1m-cu irregular, 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 0.67 of its own length; vein 2Cua 0.75 × as long as crossvein 2cu-a; bulla of crossvein 2m-cu placed on midlength; cell 1+2Rs small, APH 0.59, subquadratic, about as high as wide, AWH 1.18; crossvein 3r-m fully spectral, 2r-m and 3r-m parallel, about same length; vein 3-M almost indistinct; 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 1.05; vein Cub distinctly convex on posterior half, forming distinctly obtuse angle with vein Cua (not curved); vein 2-1A reaching 0.93 of distance to posterior wing margin.  
METASOMA: First tergite short, about 0.34 × as long as T2–8, strongly depressed, ventrolaterally angled, dorsally glabrate, laterally densely pilose; T1LW 3.27; T1WW 1.75; spiracle on 0.5 of its length, distinctly prominent; median depression elongate, distinct; lateral and median posterior depressions absent; ventrolateral carina absent. T2LW 1.17; T2WW 2.09; thyridium longer than wide, without small circular depression just behind it; T2–8 minutely coriarious, densely and uniformly pilose. OST 1.56; ovipositor moderately stout, slightly upcurved, basally cylindric, apically slightly depressed; dorsal valve with five moderately strong ridges; ventral valve apex with 5 teeth, apical teeth progressively more closely spaced; surface anterior to first tooth rugulose.  
 Color. Head, mesosoma and metasoma black and pale yellow. Head: black; clypeus, mouthparts, supra-clypeal area and complete orbital band, pale yellow (219,197,129); f7–11 entirely white, f12 mostly white, f13 basally white. Mesosoma: black; collar, dorsal margin of pronotum, propleuron laterally, subcircular spot on mesoscutum, scutellar carina, scutellum except posterior margin, tegula, subalar ridge, central mark on mesopleuron, most of mesosternum, dorsal division of metapleuron, metapleuron except anterior margin and small posterior spot, pale yellow; pale yellow, arc-shaped mark on propodeum medially interrupted forming two distinct lateral marks; fore leg pale yellow, except posterior face of coxa, dorsal stripe at first trochanter and femur and ventral mark at tibia, black; fore t5 blackish; mid and hind coxae deep orange (175,094,059), with small pale yellow and blackish basal marks; mid and hind trochanters and extreme base of mid femur bright orange, mid first trochanter and hind second trochanter with dorsal blackish mark; mid femur ventrally pale yellow, dorsally blackish; hind femur blackish; mid and hind tibiae and tarsi pale yellow, darker apically. Metasoma: black; T1 with anterior 0.5 dorsally and posterior 0.2 pale yellow; S1 pale yellow; T2 anteriorly with sublateral pale yellow marks, at lateral midlength with oval pale yellow spot; T2–7 with posterior pale yellow stripes, T2–5 with very narrow brownish posterior lines over pale yellow area; S2–6 pale yellow, S2–5 with progressively smaller lateral marks; T8 with lateral pale yellow mark.   
 Male. Fore wing 6.02–8.57 mm long. Very similar to female, except for the following: mandible except apex and malar space, pale yellow; antenna with 26–27 flagellomeres; black marks at fore coxa, fore, mid and hind trochanters and hind femur less extensive to absent; T2 without anterior marks.   
 Variation. Fore wing 8.83–10.71 mm long. Antenna sometimes with 23 flagellomeres; yellow area at dorsal margin of pronotum sometimes very narrow; mesosternum sometimes mostly black; metapleural triangle sometimes yellow; propodeal pale yellow marks sometimes medially connected; pale yellow and black basal marks at mid and hind coxae sometimes indistinct; hind femur sometimes dorsally or almost entirely orange; anterior pale yellow marks at T2 sometimes medially connected. Pale yellow areas sometimes buff (214,168,096).   
 Specimen from Minas Gerais with several differences from those from Rio Grande do Sul, as follows: mesoscutum about 1.12 × as long as wide; epicnemial carina medially with distinct longitudinal wrinkles; apical longitudinal black mark on propodeum not connected to basal black area, so that a complete arc-shaped mark is present; dark brown marks at fore leg less extensive; mid coxa pale yellow with longitudinal blackish mark on apical 0.8; mid trochanters pale yellow with blackish marks; hind coxa pale yellow with two black marks, dorsal one extending on apical 0.8, medially narrow; hind trochanters and femur pale orange, with sparse blackish marks; hind tarsus pale yellow; T2 without anterior yellow marks. This specimen may be actually part of a new, close species, but in the absence of a variation series, and given its overall similarity with M. amplithorax, it is preferable not to describe it as a new species.   
 Comments. Very similar to M. interceptus sp. nov., from which it can be differentiated by having orbital band complete (vs. interrupted at dorsal margin of eye); propodeum large, in lateral view almost as high as thorax (vs. small and somewhat rounded, distinctly shorter than thorax in lateral view – Fig. 69); T1 laterally at least partially blackish (vs. laterally yellow); central mark on mesopleuron somewhat S-shaped (vs. approximately rectangular); and ovipositor dorsal valve with five moderately strong ridges (vs. three).   
 Also very similar to M. transversostriatus, from which it can be isolated by having anterior area of propodeum entirely black (vs. with two sublateral yellowish spots); yellow marks at posterior area wider posteriorly (vs. wider anteriorly; Figs 183, 181); T2 anteriorly with sublateral ovoid yellowish marks (vs. without anterior marks); mandible entirely black (vs. mostly pale yellow); central mark on mesopleuron distinctly separated from yellow spot at subalar ridge (vs. connected with spot at subalar ridge or almost so); anterior transverse carina medially straight (vs. slightly arched forwards); and ovipositor ventral valve with five teeth (vs. eight). It can be further differentiated from M. titans sp. nov. by having mid and hind coxae and hind trochanters and femur mostly bright to deep orange (vs. coxae yellow and black, trochanters and femur dark brown).   
 Male specimens can be mistaken as males of M. euryoikos sp. nov., because the mid and hind leg color pattern of the males of the latter species are much different from the female, which seems more similar to the males of M. amplithorax sp. nov.. However, males of M. euryoikos can be recognized as such by the posterior marks on propodeum, very similar to those of females (vs. much wider on midlength in M. amplithorax); and postscutellum pale yellow to whitish (vs. black).   
 Biology. Unknown.   
 Etymology. From the Latin amplus, meaning “large”, and thorax; in reference to its stout mesosoma.   
 Material examined. 9 ♀, 6 ♂♂. Holotype ♀ from BRAZIL, Rio Grande do Sul, Capão do Leão, 7 m, 28.II.2003, Malaise trap, RFKrüger (UFES). Mounted on triangle point. In good shape.   
 Paratypes: 1 ♂ from BRAZIL, Espirito Santo, Santa Teresa, Estação Biologica Santa Lucia, Trilha principal, 6–12.XI.2009, suspended Malaise trap at 6 m, MTTavares et al. 1 ♀ from BRAZIL, Minas Gerais, Parque Estadual do Rio Doce, Área da Tereza, primary forest, Pt. 1, 17–24.VI.2003, Malaise trap, JCRFontenelle. 1 ♀ from BRAZIL, Rio Grande do Sul, Arroio Grande, 101 m, 5.III.2004, Malaise trap, RFKrüger; 1 ♂, same data except Capão do Leão, 7 m, 19.III.2004; 1 ♀, same data except 2.IV.2004; 1 ♀, same data except 27.II.2004; 1 ♂, same data except 5.III.2004; 1 ♀, same data except 9.IX; 1 ♂, same data except Pelotas, 16 m, 28.II.2003; 1 ♀, same data except 7.II.2003; 1 ♂, same data except 21.II.2003; 1 ♂, same data except 16.I.2004; 1 ♀, same data except 5.XII.2003 (UFES). 1 ♀ from URUGUAY, Cerro Largo, Sierra de Vaz, Rio Tacuari, 20 km SE Melo, 23–26.III.1963, JKBouseman (AMNH).   
 Distribution. Subtropical lowland areas in southern Brazil and Uruguay, and one record for Atlantic Forest at southeastern Brazil (Fig. 294).
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 58-60, DOI: 10.11646/zootaxa.3634.1.1, http://zenodo.org/record/5262081