Messatoporus unidentatus 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 unidentatus

description: Messatoporus unidentatus Santos, sp. nov.   
(Figs 55, 190, 252, 371)  
 Female. Fore wing 9.88 mm. HEAD: Mandible densely covered with moderately long hairs; MLW 1.39; MWW 0.35; dorsal tooth in front view projected upwards, enlarged and wide, ventral tooth indistinct. MSM 0.27. Clypeus almost entirely flattened, centrally concave; CHW 2.85; CWW 1.64; apical area medially straight, laterally slightly projected, its margin regular, not raised. Antenna with 21 flagellomeres; flagellum uniform; apex of apical flagellomere about as wide as base, not distinctly tapered. Supra-antennal area mat, scarcely punctate, distinctly striate near antennal sockets, ventrally and around ocelli slightly concave, dorsally with very weak median line, ventrally fading. Occipital carina dorsally acuminate, fading out at distance distinctly longer than basal width of mandible from the hypostomal carina. Temple and gena moderately wide, gena somewhat swollen and projected (as in Fig. 261).   
THORAX: Pronotum glabrate, shiny, impunctate, ventrally with strong wrinkles; epomia moderately strong (, apically 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, 1.2 × as long as wide, sparsely pilose, shiny, impunctate; notaulus reaching about 0.77 of mesoscutum length, weakly impressed, surface over notaulus not wrinkled; scuto-scutellar groove moderately deep, without wrinkles. Subalar ridge moderately projected; epicnemial carina reaching about 0.7 of distance to subalar ridge, irregular; 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 short, distinctly arched forwards. Transverse sulcus at base of propodeum moderately wide, about 0.66 × as long as anterior area of propodeum, medially with very weak transverse striation; metapleuron moderately punctate, 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 a distinct cluster of stout bristles. Hind coxa with moderately strong punctures separated by more than their own diameter.  
PROPODEUM: 1.04 × as long as wide, mat, moderately pilose; anterior area scarcely punctate; spiracle elongate, SWL 3.53; anterior transverse carina medially slightly arched forwards. Propodeal wrinkles strong, closely spaced, mostly complete, distinctly curved backwards; posterior transverse carina entirely absent.  
WINGS: Fore wing vein 1-Rs+M very weakly sinuous, with bulla placed on basal 0.25; crossvein 1m-cu more or less uniformly curved, limit between 1m-cu and 1-Rs+M clearly traceable; ramellus only slightly suggested; vein 1M+Rs anteriorly straight, posteriorly curved; fore wing crossvein 1 cu-a basad of 1M+Rs by 0.56 of its own length; vein 2Cua 0.69 × as long as crossvein 2cu-a; bulla of crossvein 2m-cu placed mostly on posterior half; cell 1+2Rs small, APH 0.61, pentagonal, distinctly higher than wide, AWH 0.82; 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 2.25; 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 0.41 × as long as T2–8, strongly depressed, ventrolaterally angled, dorsally glabrate, laterally moderately pilose; T1LW 2.66; T1WW 1.96; spiracle on 0.54 of its length, distinctly prominent; median depression absent; lateral and median posterior depressions absent; ventrolateral carina absent, but traceable as limit between lateral and ventral portions. T2LW 1.1; T2WW 1.63; thyridium longer than wide, without small circular depression just behind it; T2–8 minutely coriarious, moderately and uniformly pilose. OST 1.2; ovipositor moderately stout, straight, basally cylindric, apically distinctly 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 rugulose.  
 Color. Head, mesossoma and metasoma black with bright yellow marks. Head: black; clypeus, mandible except apex, mouthparts, supra-clypeal area and orbital band shortly interrupted at dorsal temple, light yellow (229,219,125); malar space brownish; pedicel dorsally with yellowish mark; f6–9 entirely white, f5 apically white, f10–11 dorsally white, f12 dorsally white on basal 0.3. Mesosoma: black: collar and propleuron light yellow; dorsal corner of pronotum, subcircular spot on mesoscutum, scutellum, axillar carina, postscutellum, tegula, subalar ridge, central mark on mesopleuron reaching ventral corner, dorsal division of metapleuron, metapleuron except anterior border and arc-shaped, somewhat pointed mark on propodeum, bright yellow; fore and mid legs light yellow at coxa, bright yellow towards apex, except for posterior brown stripes at mid first trochanter, fore and mid second trochanters and basal 0.8 of femora; fore tibial spurs, basal 0.2 of t1 and t5, brown; hind tibia anteriorly brownish (lighter towards median portion), posteriorly bright yellow; hind trochanters and femur bright orange (193,094,043), tibia and tarsus light yellow. Metasoma: black; T1 mostly bright orange, dark brown laterally at anterior 0.8 and posteriorly at median 0.4; T2 anteriorly with small brownish mark; T2–7 with posterior and lateral bright yellow stripes; T8 only with lateral yellow stripe.   
 Male. Unknown.   
 Variation. Fore wing 8.30–11.38 mm long. Antenna with 21–23 flagellomeres. One specimen with brown stripes at fore and mid femora expanded and covering most of its surface; hind coxa mostly yellowish, anteriorly blackish; black areas at T2–3 partially turning to brownish orange; one specimen with f7–9 entirely white, f10 mostly white and f6 and f11 partially white; dorsal corner of pronotum not yellow; hind coxa anteriorly blackish, medially brownish orange and posteriorly yellow.   
 Comments. More similar to M. atlanticus sp. nov., from which it can be differentiated by having mesosternum black (vs. yellow); scape ventrally black (vs. with yellow spot); hind coxa with one anterior blackish mark (vs. with three distinct black marks, median and posterior ones apically connected); hind femur orange (vs. dark brown); ventral tooth of mandible indistinct (vs. distinct and triangular); transverse sulcus moderately long, 0.66 × as long as anterior area of propodeum (vs. very long, 1.05 × as long as anterior area); and ovipositor dorsal valve with four ridges (vs. four). Also somewhat similar to M. teutonicus, from which it can be promptly isolated by hind coxa and T2–8 marked with yellow and black (vs. orange); supra-clypeal area entirely yellow (vs. mostly blackish); metapleuron mostly yellow (vs. mostly black, only posterior 0.3 yellow); thyridium longer than wide (vs. about as wide as long); and cell 1+2Rs small, APH 0.61, distinctly higher than wide, AWH 0.82 (vs, of moderate size, APH 0.93, and as wide as high, AWH 1.00).   
 Biology. One specimen from Minas Gerais reared from a nest of unidentified Pompilidae (labeled as “ Psammocharidae ”).   
 Etymology. From the latin word dentis, meaning “tooth”, added to the prefix uni-, indicating one, and the possessive suffix –atus; in reference to the indistinct ventral tooth at mandible, leaving just one visible tooth.   
 Material examined. 7 ♀. Holotype ♀ Belo Horizonte, Estação Ecológica UFMG, 4.I.1993, trap nests, reared from pompilid nest, HRPimenta (UFES). Pinned. Right mid t3–5, left mid t5 and right hind t2–5 missing; otherwise in good shape.   
Paratypes: 1 ♀ from PANAMA, Canal Zone, Margarita, III.1960, SBreeland. 1 ♀ from PANAMA, Veraguas, PN Coiba, Isla Coiba, Cerro la Torre, 7–13.III.1998, Malaise trap, RCambra. 1 ♀ from BRAZIL, Mato Grosso, Chapada dos Guimarães, 800 m, VII.1983, MAlvarenga. 1 ♀ from BRAZIL, Minas Gerais, Cáceres, XI.1984, Malvarenga (AEIC); 1 ♀, same data except Belo Horizonte, Estação Ecológica UFMG, trap nests, reared from pompilid nest, HRPimenta; 1 ♀, same data except 1.III.1993 (UFES).  
 Distribution. Recorded from widely spaced and ecologically distinct sites in southeastern Brazil, Brazilian Cerrado and Panama (Fig. 371).
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 198-199, DOI: 10.11646/zootaxa.3634.1.1, http://zenodo.org/record/5262081