Messatoporus xanthogaster 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 xanthogaster

description: Messatoporus xanthogaster Santos, sp. nov.   
(Figs 86, 375)  
 Female. Fore wing 8.00 mm. HEAD: Mandible densely covered with long hairs; MLW 2.00; MWW 0.44; dorsal tooth in front view projected upwards, much longer than ventral tooth; ventral tooth triangular. MSM 0.26. Clypeus basally convex, apically abruptly flattened, centrally concave; CHW 2.38; CWW 2.3; apical area medially concave, laterally with distinct triangular lobes, its margin very sharp, raised. Antenna with 23 flagellomeres; flagellum uniform; apex of apical flagellomere much narrower than base, distinctly tapered. Supra-antennal area shiny, coriarious, not striate near antennal sockets, ventrally and around ocelli slightly concave, without median line. Occipital carina uniformly curved, apically weak, meeting hypostomal carina far from mandible base. Temple and gena moderately wide.   
THORAX: Pronotum centrally glabrate, moderately pilose at dorsal margin, mat, minutely rugulose, ventrally with strong wrinkles; epomia almost indistinct, distinct only after diverging from pronotal collar, short, ending far from dorsal margin of pronotum. Mesoscutum strongly and uniformly convex, ovoid, 1.25 × as long as wide, densely covered with short hairs, mat, densely punctulate; notaulus reaching about 0.69 of mesoscutum length, weakly impressed, surface over notaulus not wrinkled; scuto-scutellar groove moderately deep, with vestigial longitudinal wrinkles. Subalar ridge moderately 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 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 0.67 × as long as anterior area of propodeum, colliculate; metapleuron minutely rugulose, without transverse wrinkles, dorsally sparsely pilose, ventrally moderately pilose; juxtacoxal carina represented by very short ridges. Fore tibia distinctly swollen. Mesal lobe of t4 with 3–4 bristles. Hind coxa punctate-coriarious.  
PROPODEUM: 1.07 × as long as wide, shiny, densely pilose; anterior area asperous and densely punctulate; spiracle elliptic, SWL 2.67; anterior transverse carina medially slightly arched forwards. Propodeal wrinkles weak, very closely spaced, mostly incomplete and overlapped, with some disperse complete wrinkles, 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 0.52 of its own length; vein 2Cua 0.71 × as long as crossvein 2cu-a; bulla of crossvein 2m-cu placed mostly on posterior half; cell 1+2Rs of moderate size, APH 0.88, pentagonal, about as high as wide, AWH 0.97; crossvein 3r-m fully spectral, 2r-m and 3r-m distinctly convergent, 3r-m distinctly shorter; vein 3-M distinctly longer than 2-M; 4-Rs very weakly sinuous; 4-M spectral, straight. Hind wing vein 1-M forming straight angle with vein Cua; vein 2-Rs tubular, apically spectral, reaching wing margin; HW1C 1.14; vein Cub distinctly convex on posterior half, forming distinctly obtuse angle with vein Cua (basally curved); vein 2-1A reaching 0.86 of distance to posterior wing margin.  
METASOMA: First tergite moderately long, about 0.38 × as long as T2–8, approximately cylindrical, ventrolaterally angled, uniformly, densely pilose; T1LW 3.23; T1WW 2.11; spiracle on 0.51 of its length, slightly prominent; median depression absent; lateral and median posterior depressions absent; ventrolateral carina absent, but traceable as limit between lateral and ventral portions. T2LW 1.46; T2WW 1.57; thyridium longer than wide, without small circular depression just behind it; T2–8 densely punctate and minutely and weakly coriarious, densely and uniformly pilose. OST 1.27; ovipositor slender, slightly sinuous, basally cylindric, apically distinctly depressed; dorsal valve with four weak ridges; ventral valve apex with 8 teeth, apical teeth progressively more closely spaced; surface anterior to first tooth rugulose.  
 Color. Head dark brown and bright yellow, mesosoma orange, metasoma bright yellow and brown. Head: dark brown (054,047,042); clypeus except apical and lateral marks, mouth parts, malar space, supra-clypeal area and complete orbital band, bright yellow (233,215,088); f10–13 entirely white, f9 mostly white, f8 and f14 partially white. Mesosoma: bright orange (209,086,045); pronotal collar and dorsal margin of pronotum connected, propleuron, scutellar carina, scutellum except posterior margin, tegula, subalar ridge and dorsal division of metapleuron, bright yellow; ventral 0.6 of pronotum, scutellum posteriorly, mesopleural suture ventrally, longitudinal median line at anterior area of propodeum and most of surface over anterior transverse carina, black; fore coxa mesal face pale orange, external face bright yellow; fore trochanters, femur and tibia pale yellow; trochanters and femur with dorsal longitudinal stripe, dark brown at fist trochanter, dark orange at femur; tibia with ventral brown stripe; t1–4 light orange, t5 blackish; mid coxa with sparse apical brownish marks; mid first trochanter dorsally dark brown, ventrally light brown; second trochanter and femur orange, dorsally darker; mid tibia light fuscous, mid t1–4 brown, t5 blackish; hind coxa with lateral longitudinal brown stripe on apical 0.6; hind trochanters almost entirely dark brown; femur dark brown; sub-basal 0.2 of hind tibia, apical 0.75 of t1, t2–4 and basal 0.4 of t5, whitish; extreme base and apical 0.7 of tibia, basal 0.25 of t1 and apical 0.6 of t5, blackish. Metasoma: bright yellow; T1 bright orange at median 0.3; S1 orange with anterior dark brown marks; T2 anteriorly light orange; T3 light brown at anterior 0.4; T4–7 dark brown at anterior 0.5; S3–6 with small lateral brown marks.   
 Male. Similar to female, except for the following: mandible bright yellow except apex; supra-clypeal area without brown marks; antenna with 24 flagellomeres; orange area on pronotum almost indistinct; lateral borders of mesoscutum and surface over notaulus marked with blackish; mesopleuron dorsally with small yellowish area; anterior area of propodeum blackish, posterior area with small blackish mark close to insertion of T1; 1+2Rs about as wide as high, vein 2-M distinctly longer than 3-M.   
 Variation. Blackish mark at hind coxa sometimes very small; T1 sometimes posteriorly orange; posterior area of propodeum sometimes with weak, arched yellow mark.   
 Comments. Similar to M. argentinus sp. nov., from which it can be differentiated by having T2 anteriorly light orange, posteriorly bright yellow (vs. anteriorly dark brown, posteriorly pale yellow); pronotum ventrally blackish (vs. orange); metapleuron and propodeum without yellow marks (vs. metapleuron with posterior yellow mark, propodeum with sublateral yellow marks); T 7–8 in lateral view longer than T5–6 (vs. about the same length or shorter); ovipositor dorsal valve with four weak ridges (vs. without ridges).   
 Biology. Unknown.   
 Etymology. From the Greek words xanthos, meaning “yellow”, and gaster, meaning “stomach”; in reference to the mostly yellow metasoma.   
 Material examined. 2 ♀, 1 ♂. Holotype ♀ from PERU, Machu Picchu, 1.XII.1965, HTownes & MTownes (AEIC). Pinned. In good shape.   
Paratypes: 1 ♀ from PERU, Machu Picchu, 1.XII.1965, HTownes & MTownes; 1 ♂, same data except 28.XI.1965 (AEIC).  
 Distribution. Recorded only from the type locality, in Peru (Fig. 375).
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 206-208, DOI: 10.11646/zootaxa.3634.1.1, http://zenodo.org/record/5262081