Distictus notabilis Supeleto & Santos & Aguiar 2019, sp. nov.
Creators: name: Supeleto, Fernanda A.
name: Santos, Bernardo F.
name: Aguiar, Alexandre P.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Distictus
Distictus notabilis

description: Distictus notabilis sp. nov.
urn:lsid:zoobank.org:act: 68AEC6E7-A939-4D0B-8288-2EC74110ACFE
Figs 12, 16E
Etymology
From the Latin ‘ notabilis ’, meaning ‘notable’, in reference to the large size, rich colour pattern and the overall beauty of the species, which draws attention.
Material examined
Total of 1 specimen.
Holotype
PERU • 1 ♀ (pinned; last seven apical flagellomeres missing, left hind wing perforated by pin; otherwise in good condition); Tingo Maria, Huan; alt. 2200 ft; 3 Nov. 1946; J.C. Pallister leg., donor Frank Johnson; AMNH {0}.
Description
Female (holotype)
SIZE. Fore wing 14.00 mm long.
HEAD. Clypeus basally moderately convex, at midlength distinctly emarginated, CHW 0.40; median tubercle small, blunt, placed entirely on apical area; apical area narrow. Mandible moderately pilose, MLW 1.31, MWW 0.55. MSM 0.83. Supra-clypeal area moderately pilose, minutely coriarious and sparsely punctate. Antenna with 30 flagellomeres. Supra-antennal area minutely, faintly coriarious, medially near ocelli rugulose, ventrally striate and distinctly concave, with distinct median line.
MESOSOMA. Pronotum sparsely pilose, weakly striate along posterior margin and collar, elsewhere impunctate; epomia delicate, distinct and slightly curved only after diverging from pronotal collar, short, ending far from dorsal margin of pronotum. Mesoscutum densely covered with short hairs, densely punctate, mesoscutum 1.02 × as long as wide; notauli medially weakly convergent, notaulus 0.54 × as long as mesoscutum; scuto-scutellar groove moderately deep, distinctly carinulate. Mesopleuron almost entirely lineate, otherwise punctate; subalar ridge wide, oval, not keeled; epicnemial carina more or less uniformly curved, reaching about 0.85 of distance to subalar ridge; sternaulus moderately deep, posterior 0.4 almost indistinct, with weak vertical wrinkles; sulcus between sternaulus and scrobe almost indistinct; mesopleural fovea shallow, not forming a central pit; mesopleural suture weakly carinulate inside. Metapleuron lineate-rugulose, densely pilose; juxtacoxal carina vestigial. Hind coxa, dorsally sparsely, otherwise densely punctate.
PROPODEUM. Sparsely pilose; anterior margin medially concave; spiracle elongate, SWL 1.67; anterior area coriarious-punctate; posterior area strigate; anterior transverse carina laterally approximately straight, medially slightly arched forwards; posterior transverse carina represented only by very slight sublateral crests.
WINGS. Fore wing vein 1M+Rs anteriorly straight, posteriorly curved; crossvein 1cu-a convex, arising a little basad of 1M+Rs; crossvein 1m-cu irregular, distinctly longer than vein 1-Rs+M; limit between veins 1m-cu and 1-Rs+M clearly traceable; fore wing vein 1-Rs+M with bulla placed near its midlength; vein 2Cua 1.20 × as long as crossvein 2cu-a; 3r-m nebulous, about as long as 2r-m; vein 3-M about as long as 2-M; AWH 0.92, AAW 0.51; areolet 0.28 × as high as wide; APH 1.08; vein 4-M nebulous, slightly sinuous. Hind wing with 9 hamuli; vein M+Cu apically moderately convex; vein M forming distinctly obtuse angle with Cua; HW1C 1.57; vein Cub almost straight, very slightly convex, forming distinctly obtuse angle with Cua (not curved); vein 2-Rs apically nebulous.
METASOMA. T1LW 1.43, T1WW 2.30; spiracle slightly prominent, on 0.51 of T1 length; median depression distinct; lateral depression very shallow; dorsolateral carina represented by blunt ridge; ventrolateral carina sharp, complete. T2LW 0.80, T2WW 1.83; thyridium about as wide as long. Tergites 2–8 coriarious; pilosity progressively denser on posterior tergites and laterally denser than dorsally. Ovipositor slightly downcurved; OST 0.64; dorsal valve moderately punctate; ventral valve distinctly overlapping dorsal valve, its apex with 6 teeth.
COLOUR. Head and mesosoma black with yellow marks; metasoma mostly orange. Head black; basal spot on mandible, clypeus except lateral borders and area around median tooth, mouthparts and most of supra-clypeal area light yellow. Supra-clypeal area with oblique blackish marks on ventral 0.3. Orbital band shortly interrupted on malar space, never covering entire width of gena; f6–12 entirely white, f5 and f13 partially white; f13–30 ventrally dark brown. Mesosoma black; collar, dorsal margin of pronotum, central spot on mesoscutum, tegula, scutellum, postscutellum, subalar ridge, central mark on mesopleuron, hypoepimeron, dorsal division of metapleuron, oval mark covering 0.5 of metapleuron and elongate sublateral marks extending from anterior area of propodeum to its posterior apex light yellow. Fore and mid coxae mesally black, laterally yellow; fore and mid first trochanters marked with light yellow and blackish; fore and mid second trochanters marked with light yellow, orange and blackish; fore and mid femur mostly light yellow; fore femur marked with brown and blackish on dorsal and posterior faces; mid femur blackish on anterior and posterior faces; all tibiae deep yellow; fore and mid tarsi basally yellow, blackish towards apex. Hind coxa, trochanters and femur bright orange, coxa with dorso-basal yellow spot and blackish marks on its extreme base; hind tarsus deep yellow. Wings hyaline. Metasoma bright orange; T1 mostly blackish with basal 0.2 and apical 0.25 yellow. Sternites slightly lighter than tergites.
Male
Unknown.
Comments
Structurally, D. notabilis sp. nov. differs from all other species in the genus by having one exclusive feature: pronotum weakly striate along posterior margin and collar, except impunctate elsewhere.
The new species is very similar in colour to D. ateles sp. nov., for which it can be easily mistaken. Distictus notabilis sp. nov. can be differentiated by having the supra-clypeal area ventrally with two oblique blackish marks (vs three blackish marks that almost connect centrally to form an inverted Y in D. ateles sp. nov.); orbital band shortly interrupted, almost meeting at eye margin (Fig. 12A) (vs widely interrupted on malar space, broadly disconnected at eye margin, Fig. 7A); large yellow mark dorsad of spiracle of propodeum (Fig. 12F) (vs very small yellow spot dorsad of spiracle, Fig. 7C); hind coxa with basal dorsal yellow spot not encircled by blackish ring (Fig. 12D) (vs encircled by blackish ring, Fig. 7D); hind femur fully bright orange (vs reddish, apically blackish). The new species is also most similar in structure to D. ateles sp. nov., but differs in 34 features, of which the most important are as follows: epicnemial carina reaching about 0.85 of distance to subalar ridge (vs reaching about 0.70 of distance to subalar ridge); pronotum weakly striate along collar (vs distinctly striate); median tubercle of clypeus small, placed entirely on apical area (vs large, placed mostly on apical area); fore wing crossvein 1cu-a arising a little basad of 1M+Rs (vs distinctly basad of 1M+Rs); spiracle of T1 slightly prominent (vs not prominent); ovipositor slightly downcurved (Fig. 12D) (vs straight, Fig. 7D); apical area of clypeus narrow (vs moderately wide); clypeus basally moderately convex (Fig. 12C) (vs basally nearly flat, Fig. 7D); areolet 0.28 × as high as wide (vs 0.45).
The new species is also similar in structure and colour to D. tibialis, but differs by having metapleuron with large yellow mark (Fig. 12D, G) (vs entirely black in D. tibialis, Fig. 15C, G) and anterior area of propodeum with yellow marks (Fig. 12C, F) (vs black, Fig. 15F). Structurally, it differs in 44 features, of which the most important are as follows: posterior area of propodeum strigate (as in Fig. 7C) (vs rugulose, Fig. 15F); mesoscutum densely punctate (vs punctate-coriarious); metapleuron lineaterugulose (vs rugulose); pronotum weakly striate (vs distinctly striate); epicnemial carina reaching about 0.85 of distance to subalar ridge and more or less uniformly curved (vs reaching subalar ridge, irregular); supra-antennal area ventrally distinctly concave (vs ventrally and around ocelli slightly concave); areolet 0.28 × as high as wide (vs 0.31–0.38).
The new species is also similar in colour and structure to D. paratibialis sp. nov., from which it can be isolated by having T1 mostly black (Fig. 12D) (vs orange, Fig. 13B); supra-clypeal area with blackish marks (vs entirely yellow); fore and mid coxae pale yellow, with small dorso-apical brown spots (Fig. 13D) (vs dorsally yellow, Fig. 12 C–D). Structurally, it differs in 52 features, of which the most important are as follows: posterior area of propodeum distinctly strigate (vs strigate-rugulose); metapleuron lineaterugulose (vs rugulose); FLGM 30.00 (vs 26.00–27.00); mesoscutum densely punctate (vs punctatecoriarious); spiracle slightly prominent (vs not prominent); epicnemial carina more or less uniformly curved (vs irregular); supra-antennal area with distinct median line (vs with delicate median line).
Distribution records
Peru.
description: Published as part of Supeleto, Fernanda A., Santos, Bernardo F. & Aguiar, Alexandre P., 2019, Revision of Distictus Townes, 1966 (Hymenoptera, Ichneumonidae, Cryptinae), with descriptions of ten new species, pp. 1-64 in European Journal of Taxonomy 542 on pages 40-43, DOI: 10.5852/ejt.2019.542, http://zenodo.org/record/3378752