Xoridesopus tokarensis, Watanabe, 2019

Kyohei Watanabe, 2019, Taxonomic and Zoogeographical Notes of Japanese Cryptinae (Hymenoptera, Ichneumonidae), with Description of Five New Species, Bulletin of the Kanagawa Prefectural Museum (Natural Science) 48, pp. 81-113 : 109-110

Xoridesopus tokarensis sp. nov.

(Standard Japanese name: Tokara-shima-togari-himebachi) ( Figs. 3K , 13G–K )

Holotype. KPM-NK 69548, F, Kagoshima Pref., Tokara Isls., Nakanoshima Is. , Satomura , 5–8. VI. 2005, T. Mita leg. ( Yellow pan trap).

Description. Female (n=1). Body length 11.5 mm, mat, covered with silver setae.

Head 0.65 times as long as wide. Clypeus 0.55 times as long as wide, slightly convex, sparsely punctate dorsally, its anterior margin with a minute median tooth. Face 0.5 times as long as wide, slightly convex medially. Frons slightly concave above antennal socket, sparsely punctate laterally, smooth ventrally, with irregular rugae mediodorsally. Occipital carina complete, its lower end joined with hypostomal carina. MSL 0.7 times as long as BWM. OOL 1.4 times as long as OD. POL 0.8 times as long as OD. Antenna with 23 flagellomeres. F1 1.05 times as long as F2.

Mesosoma. Epomia present, weak and short. Lateral area of pronotum covered with longitudinal striae medially ( Fig. 13J ), punctate dorsally and ventrally. Notauli distinct and deep on anterior 0.6 of mesoscutum. Mesoscutum densely punctate except for a median area with irregular rugae. Scutellum slightly convex, punctate. Epicnemial carina distinct, its dorsal end close to subalar prominence. Mesopleuron with striae along epicnemial carina, subalar prominence and speculum. Speculum smooth. Metapleuron covered with irregular rugae. Propodeum with anterior transverse carina, posterior transverse carina (weak laterally) and pleural carina, covered with irregular rugae except for area anterior to anterior transverse carina densely punctate. Propodeal apophysis absent. Propodeal spiracle oval. Fore wing length 8.0 mm. Areolet medium-sized, hexagonal, with sides convergent anteriorly. Nervulus based on basal vein. Nervellus intercepted posterior to midpoint. Fore tibia with a bulge except for basal 0.25. Hind femur 6.0 times as long as maximum depth in lateral view. Hind TS2: TS1, TS3, TS4 and TS5 = 2.0: 4.9, 1.1, 0.9 and 1.5.

Metasoma densely punctate. T1 1.75 times as long as maximum width, with a pair of small triangular teeth at base. Median dorsal carina and dorsolateral carina of T1 complete. T2 0.8 times as long as maximum width. Posterior margin of T8 truncate, its dorsal corner almost right angle in lateral view. Ovipositor sheath 1.0 times as long as hind tibia.Apex of ovipositor as Fig. 3K .

Coloration ( Figs. 13G–K ). Body (excluding wings and legs) black, except for: clypeus except for dorsal margin, face except for a pair of longitudinal black stripes, all orbits except for dorsal end of temporal orbit, malar space and black area along antennal socket, gena except for posterior margin, palpi, median spot of collar, posterodorsal corner of pronotum, a median spot of mesoscutum, scutellum, postscutellum, anterior small spot of tegula, subalar prominence, small spot of speculum, a posterior small spot of mesopleuron, two spots of metapleuron, a spot of propodeum, posterior band of T1–T3 and T6, lateral small spot of T7 and T8 whitish yellow to yellow; F7–F12 with a white band; apical part of antenna and posterior margin of T4 and T5 slightly tinged with reddish brown; ovipositor reddish brown. Wings hyaline; veins and pterostigma blackish brown to brown except for yellow wing base. Legs reddish brown, except for: coxae black with a whitish yellow marking apically; trochanters and trochanteli yellowish brown with blackish brown marking; apex of hind femur blackish brown; hind tibia blackish brown except for a subbasal small yellow area; hind tibial spurs blackish brown; hind tarsus whitish yellow except for base of TS1, dorsal part of TS4 and TS5 blackish brown.

Distribution. Japan (Nakanoshima Is. of Tokara Isls.).

Etymology. The specific name is from the type locality, Tokara Islands.

Remarks. This species apparently resembles X. schuleri ( Dalla Torre, 1902) from India, Burma and Indonesia, but it can be distinguished by the following combination of character states: hind coxa largely black ( Figs. 13G, J ) (largely yellow or yellowish brown in X. schuleri ); scutellum densely punctate (not densely punctate in X. schuleri ).

Figures

Fig. 3. Giraudia japonica sp. nov. (A, B, KPM-NK 69946), Apsilops scotinus (Tosquinet, 1903) (C, KPM-NK 69932), Dihelus hylaevorus (Momoi, 1966) (D, paratype, MNHAH), Eurycryptus sakaguchii (Uchida, 1932) (E, NIAES), Hedycryptus ohshimensis (Uchida, 1930) (F, NIAES), Ischnus splendens sp. nov. (G, KPM-NK 69406), Nematopodius (Nematopodius) montanus sp. nov. (H, KPM-NK 69554),Torbda sauteri Uchida, 1932 (I, KPM-NK 69501),Xoridesopus amamiensis sp. nov. (J, KPM-NK 69529) andX. tokarensis sp. nov. (K, KPM-NK 69548), female ― A–K, apex of ovipositor, lateral view.

Fig. 13. Xoridesopus infuscatus Gupta & Gupta, 1983 (A–F) and X. tokarensis sp. nov. (G–K), KPM-NK 5006283 (A–D), 5006289 (E, F) and 69548 (G–K), females (A–D, G–K) and male (E, F) ― A, F, habitus, lateral view; B, G, head, mesosoma and metasoma, dorsolateral view; C, H, head, frontal view; D, head and mesosoma, lateral view; E, nervellus of hind wing.