Jethsura euthenia, Claridge, 2021

Claridge, Brandon, 2021, Revision of the genus Jethsura Cameron, 1902 (Hymenoptera: Ichneumonidae: Ichneumoninae: Phaeogenini), Zootaxa 5071 (2), pp. 223-241 : 225-228

Jethsura euthenia sp. nov.

Figs 1–2 , 12

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Diagnosis. Jethsura euthenia is similar to J. gonawindua , both being overall black and with the mesosoma not laterally flattened. The black mandible with a dark reddish apex is sufficient to distinguish J. euthenia from the latter species which has a brown to light brown mandible with a dark brown apex. Additionally the head morphology differs significantly between the two species. In anterior view, the head in J. euthenia is slightly longer and tapers ventrally and the clypeus and supraclypeal area are slightly convex in profile. In males, however, the differences in head morphology are less pronounced.

Description. Female ( Fig. 1A–H ). Body length: 6.9–8.1 mm; fore wing length: 4.4–4.9 mm.

Color. Primarily black with few yellow and yellowish-white markings and partially brownish legs. Head black, except for mandibular brown with black base and dark reddish-brown apex, paraocular area with narrow light yellowish mark medially dorsal to antennal base and at dorsolateral corner (25% of specimens with venterolateral corner brownish). Antenna black, except for pedicel apically brownish. Mesosoma black, except for dorsal margin of pronotum and tegula yellowish-white. Fore leg: coxa varying from entirely black to black and brownish anteriorly; trochanter black, except for apex brownish laterally; trochantellus brown; femur anteriorly brownish-yellow, except for basal 0.3 dark brown, posteriorly dark brown, except for apical 0.2; tibia brownish-yellow ventrally, darker dorsally; tarsus reddish-brown except tarsomere 5 dark brown to dark reddish-brown. Mid leg: coxa varying from entirely black to black and brownish anteriorly; trochanter black, except for apex anteriorly brownish; trochantellus brown; femur dark brown, except for anteriorly with apical 0.2 brownish-yellow, posteriorly varying from entirely dark brown to apical 0.1 brownish-yellow; tibia brownish-yellow, dark dorsally; tarsus reddish-brown except tarsomere 5 dark brown to dark reddish-brown. Hind leg: coxa black; trochanter black; trochantellus dark brown; femur dark brown to black except for apical 0.1 brownish; tibia brownish-yellow becoming brown dorsally; tarsomeres 1–4 reddish-brown with brownish-yellow bases; tarsomere 5 dark brown. MS1 black. T2-7 black with lateral and posterior margins light brownish. Wing: membrane clear; basal 0.1 of wing with veins white, remaining sections brown.

Head. Slightly tapering ventrally. Mandible moderately wide (MI: ~3.2×). Clypeus and supraclypeal area slightly convex in lateral view. Clypeus smooth and moderately to coarsely punctate with punctures separated by 0.5–1.8× their diameter. Supraclypeal area smooth and densely punctate with punctures varying from subadjacent to separated by 0.3× their diameter, 50% of specimens with dorsal punctures confluent forming rugulae submedially. Gena smooth and finely punctate with punctures separated by 1.5–2.5× their diameter. Supra-antennal area smooth and finely to moderately punctate with punctures subadjacent to separated by 0.3× their diameter, 20% of specimens with some punctures confluent and forming transverse rugulae. Vertex smooth and finely, sparsely punctate with punctures separated by 1.0–3.0× their diameter, denser medially. Hypostomal and occipital carinae meeting before mandible. Antenna with 24 flagellomeres.

Mesosoma . Of normal width, not laterally flattened. Pronotum varying from smooth and finely punctate dorsally to primarily rugulose and smoother anterodorsally. Propleuron smooth with fine, dense, shallow punctation. Mesonotum smooth with anterior 0.1 very finely, densely punctate, remainder moderately punctate with punctation varying considerably in size and density. Scutellum smooth and sparsely punctate with punctures separated by 1.0– 2.0× their diameter. Mesopleuron smooth and varying from densely, coarsely punctate with punctures subadjacent to densely punctate-rugulose. Speculum smooth and finely to moderately punctate. Ventral division of metapleuron smooth and sparsely to densely punctate. Propodeum: of normal width, length and width nearly equal; evenly rounded mediolaterally; dorsal face smooth and varying from densely, coarsely punctate to punctate-rugulose laterally becoming smoother medially; posterior face varying from rugulose to punctate-rugulose; carinae obsolete, except for pleural carina, posterior transverse carina, and median longitudinal carina posterior to posterior transverse carina subobsolete. Legs of normal length. Hind femur normal, not anteroposteriorly flattened.

Metasoma. MS1 smooth, postpetiole varying from moderately to densely, coarsely punctate, medially nearly impunctate. T2 smooth and with moderately dense punctation varying from fine to coarse. Gastrocoelus well-developed. Thyridium well-developed; narrow, 0.7–0.8× as wide as interthyridial width; distant from T2 anterior margin by 0.2× tergite length. T3–7 smooth and varying from moderately to finely punctate with punctation becoming sparser and finer posteriorly.

Male ( Fig. 2A–C ). Body length: 6.9–8.1 mm; fore wing length: 4.4–4.9 mm. As in female except for: postpetiole of MS1 moderately to densely punctate, 10% of specimens with some punctures confluent becoming irregular longitudinal rugulae; T2–7 densely punctate with punctures separated by 0.3–0.5 their diameter and becoming sparser posteriorly. Antenna with 26 flagellomeres.

Material examined. Holotype: Colombia • 1♀; Boyacá, SFF Iguaque, Cabaña Mamarramos ; 2855m; 5°25’N, 73°27’W; 23.v.–08.vi.2000; P. Reina; P. Reina; M. 149; IAVH.

Paratypes: Colombia • 36♂♂, 3♀♀; same collection data as holotype; 19.iv.–0.6. v.2000; M.55; IAVH • 10♂♂, 4♀♀; same collection data as preceding; EMUSENT00004089, EMUSENT00004021, EMUSENT00003574, EMUSENT00004386, EMUSENT00004082, EMUSENT00004382, EMUSENT00003759, EMUSENT00003999, EMUSENT00004201, EMUSENT00003513, EMUSENT00003545, EMUSENT00004267, EMUSENT00003884, EMUSENT00003966 • 38♂♂, 5♀♀; same collection data as holotype; 06–23.v.2000; M.74; IAVH • 3♂♂, 3♀♀; same collection data as preceding; EMUSENT00003632, EMUSENT00003932, EMUSENT00003674, EMUSENT00003725, EMUSENT00004360, EMUSENT00003944 • 19♂♂, 5♀♀; same collection data as holotype; 23.v.–08.vi.2000; M.149; IAVH • 6♂♂, 2♀♀; same collection data as preceding; EMUSENT00003788, EMUSENT00004334, EMUSENT00004206, EMUSENT00004419, EMUSENT00004385, EMUSENT00003572, EMUSENT00004261, EMUSENT00004477 • 1♂; same collection data as holotype; SFF Iguaque , La Planada; 2850m; 23.v.–08.vi.2000; M.152; IAVH • 19♂♂, 6♀♀; same collection data as holotype; 08–25.vi.2000; M.184; IAVH • 1♀; same collection data as preceding; EMUSENT00003663 • 7♂♂; same collection data as holotype; 13-30.vii.2000; M. 380; IAVH • 10♂♂; same collection data as holotype; 30.vi-. 17.vii.2000; M. 390; IAVH • 12♂♂, 7♀♀; same collection data as holotype; 01–23.ix.2000; M.614; IAVH • 1♂♂, 1♀; same collection data as preceding; EMUSENT00003460, EMUSENT00003733 • 31♂♂, 8♀♀; same collection data as holotype; 23.ix.– 11.x.2000; M.752; IAVH • 1♀; same collection data as preceding; EMUSENT00004447 • 3♂♂; same collection data as holotype; 04–21.xii.2002; M.1080, IAVH • 6♂♂, 2♀♀; Boyacá, SFF Iguaque ; 5°25’12’’N, 73°27’24’’W; 2855m; 16.iii.–01.iv.2000; P. Reina; IAVH • 21♂♂, 9♀♀; Boyacá, SFF Iguaque, Cabaña Mamorramos ; 5°25’12’’N, 73°27’24’’W; 2855m; 17.viii.–15.ix.2000; P. Reina; IAVH • 12♂♂, 2♀♀; same collection data as preceding; 25.vi – 13.vii.2000; IAVH • 5♂♂, 5♀♀ ; same collection data as preceding; 28.ii.–16.iii.2000; M. 4; IAVH • 2♂♂, 3♀♀ ; same collection data as preceding; 01–18.iv.2000; M. 24; IAVH .

Distribution. Known only from type locality ( Fig. 12 ).

Etymology. Noun in apposition from Greek meaning abundance due to the large number (relatively) of specimens collected.

Comments. At the type locality, J. euthenia can be locally abundant as one Malaise trap yielded 46 males and 9 females within a three-week period.

Figures

FIGURE 1. Jethsura euthenia sp. nov. female holotype. A. Habitus. B. Mesosoma, lateral view. C. Head, frontal view. D. Mandible, venterolateral view. E. Propodeum, dorsolateral view. F. MS1–2, dorsolateral view. G. Metasomal apex, lateral view. H. Metasoma, dorsolateral view. Scale bars: 5.0 mm (A); 1.0 mm (B–H).

FIGURE 2. Jethsura euthenia sp. nov. male paratype. A. Habitus. B. Head, frontal view. C. Mandible, ventral view. Scale bars: 5.0 mm (A); 1.0 mm (B–C).

FIGURE 12. Distribution of Jethsura euthenia sp. nov., Jethsura gonawindua sp. nov., Jethsura serpentina sp. nov., and Jethsura sp. X.