Distictus caligaris, Supeleto & Santos & Aguiar, 2019

Supeleto, Fernanda A., Santos, Bernardo F. & Aguiar, Alexandre P., 2019, Revision of Distictus Townes, 1966 (Hymenoptera, Ichneumonidae, Cryptinae), with descriptions of ten new species, European Journal of Taxonomy 542, pp. 1-64 : 26-29

Distictus caligaris sp. nov.

urn:lsid:zoobank.org:act:62DFB390-DCE7-4552-9DA9-37DFC094E52B

Figs 8 , 16E

Etymology

From the Latin ‘ caliga ’, meaning ‘soldier’s shoe or boot’, in reference to the black apex of the posterior tibia and base of basitarsus.

Material examined

Total of 1 specimen.

Holotype

PERU • ♂ (pinned; right fore tarsomeres 2–5 missing; otherwise in good condition); Avispas , near Marcapata; alt. 30 m; Sep. 1962; L. Peña leg.; USUC {0}.

Description

Male (holotype)

SIZE. Fore wing 6.40 mm long.

HEAD. Clypeus basally moderately convex, at midlength not distinctly emarginated, CHW 0.44; median tubercle small, pointed, placed entirely on apical area; apical area moderately long. Mandible moderately pilose, MLW 1.55, MWW 0.55. MSM 0.73. Supra-clypeal area moderately pilose, minutely coriariouspunctate. Antenna with 28 flagellomeres. Supra-antennal area minutely, faintly coriarious and sparsely punctate, medially coriarious, ventrally and around ocelli slightly concave, with delicate median line.

MESOSOMA. Pronotum glabrate, weakly striate along posterior margin, elsewhere faintly coriarious; epomia delicate, distinct and aproximately straight only after diverging from pronotal collar, short, ending far from dorsal margin of pronotum. Mesoscutum densely covered with short hairs, densely punctate, 1.13 × as long as wide; notauli medially distinctly convergent, 0.48 × as long as mesoscutum; scuto-scutellar groove moderately deep, weakly carinulate. Mesopleuron mostly finely punctate, on dorsal area between hypoepimeron and epicnemial carina weakly lineate; subalar ridge moderately wide, not keeled; epicnemial carina irregular, reaching about 0.85 of distance to subalar ridge; sternaulus moderately deep, posterior 0.4 almost indistinct, with distinct vertical wrinkles; sulcus between sternaulus and scrobe absent; mesopleural fovea represented only by moderately deep pit; mesopleural suture distinctly carinulate inside. Metapleuron rugulose, densely pilose; juxtacoxal carina represented by short ridge. Hind coxa densely punctate.

PROPODEUM. Sparsely pilose; anterior margin medially concave; spiracle oval, SWL 1.05; anterior area coriarious-punctate; posterior area strigate-rugulose; anterior transverse carina almost straight; posterior transverse carina entirely absent.

WINGS. Fore wing vein 1M+Rs anteriorly straight, posteriorly curved; crossvein 1cu-a weakly convex, arising slightly basad of 1M+Rs; crossvein 1m-cu more or less uniformly curved, not distinct from 1-Rs+M; 1m-cu continuous with 1-Rs+M; vein 1-Rs+M with bulla placed near basal 0.3; vein 2Cua 1.18 × 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 1.00, AAW 0.50; areolet 0.44 × as high as wide; APH 0.84; vein 4-M nebulous, slightly sinuous. Hind wing with 6 hamuli; vein M+Cu apically moderately convex; vein M forming distinctly obtuse angle with Cua; HW1C 1.71; vein Cub almost straight, basally slightly curved, forming distinctly obtuse angle with Cua; vein 2-Rs apically nebulous.

METASOMA. T1LW 3.41, T1WW 2.12; spiracle distinctly prominent, at 0.46 of T1 length; median depression very shallow; lateral depression absent; dorsolateral carina represented by blunt ridge; ventrolateral carina delicate but complete. T2LW 2.19, T2WW 1.89; thyridium about as wide as long. Tergites 2–8 coriarious-punctate; pilosity progressively denser on posterior tergites, also laterally denser than dorsally.

COLOUR. Head and mesosoma black and yellow; metasoma mostly orange. Head mostly light yellow; apical 0.5 of mandible, supra-antennal area medially, vertex, occiput and posterior 0.2–0.5 of gena on its dorsal 0.4 black. Orbital band covering almost entire width of gena on its ventral 0.6. Antenna mostly dark brown; scape ventrally mostly bright yellow; f10–21 entirely white, f9 and f22 mostly white. Mesosoma black; collar, dorsal margin of pronotum, propleuron, central spot on mesoscutum, tegula, scutellum, postscutellum, subalar ridge, central mark on mesopleuron, hypoepimeron, dorsal division of metapleuron and sublateral marks covering most of posterior area of propodeum light yellow. Fore and mid coxae and first trochanters light yellow; fore and mid second trochanters and femora ventrally yellowish, dorsally light fuscous on fore leg, orange on mid one; fore and mid tibia yellowish; fore tarsus basally yellowish, brownish towards apex; mid tarsus brownish. Hind coxa orange, with dorsobasal yellow spot and sparse blackish marks; hind first trochanter marked with orange, blackish and yellow; second trochanter and femur orange, extreme apex of femur blackish; basal 0.7 of hind tibia deep yellow, apical 0.3 blackish; basal 0.3 of hind t1 and apex of t5 blackish; remainder of tarsus whitish. Wings hyaline. Metasoma mostly bright orange, T2–3 somewhat darker anteriorly; T1 mostly light yellow, median 0.5 blackish; T2–4 with posterior yellow stripes.

Female

Unknown.

Comments

The examined specimen is very similar to males of D. tibialis , from which the present species can be differentiated by having T2–4 with posterior yellow stripes ( Figs 8 C–8D) (vs fully orange, Fig. 15E ); anterior transverse carina of propodeum almost straight ( Fig. 8B ) (vs distinctly arched forwards in the center, Fig. 15F ); white band formed by 14 flagellomeres (vs 5–9); scape dorsally pale yellow (vs dark brown, rarely with apical yellow spot); sublateral yellow marks covering most of posterior area of propodeum, the marks close to each other (vs not covering most of posterior area of propodeum, the marks well separated). Also similar to males of D. paratibialis sp. nov., from which it can be readily differentiated by having the metapleuron entirely black (vs with distinct yellow mark); mesosternum black (vs yellow); and crossvein 1cu-a arising slightly basad of 1M+Rs (vs distinctly basad of 1M+Rs).

Distribution records

Peru.

Figures

Fig. 8. Distictus caligaris sp. nov., holotype (USUC), ♂. A. Head, frontal view. B. Propodeum + hind coxa + first tergite, dorsal view. C. Habitus. D. Dorsal view.

Fig. 16. Distribution records for Distictus spp. A. D. mexicanus Kasparyan & Ruíz, 2005. B. D. ateles sp. nov. C. D. paratibialis sp. nov. D. D. tibialis (Brullé, 1846). E. Least common species: D. commatus sp. nov. (star), D. daelus sp. nov. (triangle), D. asterios sp. nov. (circle), D. notabilis sp. nov. (lozenge), D. ardens sp. nov. (square), D. caligaris sp. nov. (thin lozenge) and D. apaensis sp. nov. (pentagon). F. D. terrosus sp. nov.

Fig. 15. Distictus tibialis (Brullé, 1846). A–B. Head, frontal view (A: UFES; B: CNCI). C. Mesosoma, left side (UFES). D. ♀, habitus (DZUP). E. ♂, habitus (UFES45305). F. Propodeum + coxae + first tergite, dorsal view (UFES51229). G. ♀, habitus (UFES). H. Apex of ovipositor, left side (UFES45337).