Xoridesopus amamiensis, 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 : 106-108

Xoridesopus amamiensis sp. nov.

(Standard Japanese name:Amami-shima-togari-himebachi)

( Figs. 1L , 2C, H , 3J , 12A–G )

Holotype. KPM-NK 69529 , F, JAPAN, Kagoshima Pref., Amamioshima Is., Mt. Yuidake , 27. VII. 2004, H. Makihara leg. (MsT).

Paratypes. JAPAN: KPM-NK 69530–69532 , 3 F, same data of holotype ; KPM-NK 69533 , 69534 , 2 F, ditto, 2. VII. 2004 ; KPM-NK 69535 , F, ditto, 24. VIII. 2004 ; KPM-NK 69536–69539 , 4 F, ditto, 19. IX. 2004 ; KPM-NK 69540 , 69541 , 2 F, ditto, 14. X. 2004 ; KPM-NK 69542 , F, Kagoshima Pref., Amamioshima Is., Nase, Chuo-rindo, 4. VI. 2007, K. Watanabe leg. ; KPM-NK 69525–69527 , 3 M, Kagoshima Pref., Tokunoshima Is., Kedoku, 21. V. 2008, A. Sakai leg. ; KPM-NK 69546 , 69547 , 2 F, Kagoshima Pref., Tokunoshima Is., Tete, Mt. Amamigdake , 27. III. 2011, K. Watanabe leg. ( KPMNH:).

Description. Female (n=16). Body length 8.5–13.5 (HT: 13.5) mm, mat, covered with silver setae.

Head 0.65 times as long as wide. Clypeus 0.5 times as long as wide, slightly convex, sparsely punctate dorsally, its anterior margin with a minute median tooth. Face 0.5–0.55 (HT: 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 0.6–0.7 (HT: 0.7) times as long as BWM. OOL 1.2–1.5 (HT: 1.2) times as long as OD. POL 0.8–0.9 (HT: 0.8) times as long as OD. Antenna with 23–24 (HT: 23) flagellomeres. F1 1.05–1.2 (HT: 1.1) times as long as F2.

Mesosoma. Epomia present, weak and short. Lateral area of pronotum largely covered with longitudinal striae ( Fig. 12D ), 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 and pleural carina ( Fig. 2C ), covered with irregular rugae except for area anterior to anterior transverse carina densely punctate. Posterior transverse carina of propodeum sometimes indistinct dorsolaterally. Propodeal apophysis absent ( Fig. 2C ). Propodeal spiracle oval ( Fig. 2C ). Fore wing length 6.5–10.5 (HT: 10.5) mm. Areolet medium-sized, hexagonal, with sides convergent anteriorly ( Fig. 1L ). Nervulus based on basal vein. Nervellus intercepted posterior to midpoint ( Fig. 12E ). Fore tibia with a bulge except for basal 0.25. Hind femur 5.0–5.9 (HT: 5.0) times as long as maximum depth in lateral view. Hind TS2: TS1, TS3, TS4 and TS5 = 2.0: 5.0–5.5 (HT: 5.3), 1.1, 0.8–0.9 (HT: 0.8) and 1.8–2.0 (HT: 1.9).

Metasoma densely punctate. T1 1.5–1.85 (HT: 1.5) times as long as maximum width, with a pair of small triangular teeth at base ( Fig. 2H ). Median dorsal carina and dorsolateral carina of T1 complete. T2 0.8–0.9 (HT: 0.85) 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. 3J .

Coloration ( Figs. 12A–E ). Body (excluding wings and legs) black, except for: clypeus except for dorsal margin and small median spot of anterior margin, face except for a pair of longitudinal black stripes, mandible except for apex, all orbits except for dorsal end of temporal orbit and black area along antennal socket, gena, malar space, palpi, collar (sometimes only anteriorly), dorsal margin of pronotum, a median spot of mesoscutum, scutellum, postscutellum, tegula, subalar prominence, speculum, a posterior spot of mesopleuron, two spots of metapleuron, a spot of propodeum, posterior band of T1–T6 and lateral side of T5–T8 whitish yellow to yellow; F6–F13 (sometimes also F5, F14 and F15) with a white band; apical part of antenna slightly tinged with reddish brown; ovipositor reddish brown. Wings hyaline; veins and pterostigma blackish brown to brown except for yellow wing base. Fore and mid legs whitish yellow to reddish yellow except for TS4 and TS5 tinged with blackish brown. Hind leg whitish yellow, except for: coxa largely black, trochanter and trochantellus tinged with blackish brown; hind femur reddish brown except for brown apex; hind tibia reddish brown to blackish brown; TS4 and TS5 blackish brown.

Male (n=3). Similar to female ( Figs. 12F–H ). Body length 7.5–8.0 mm. Face 0.6 times as long as wide. POL 0.9–1.0 times as long as OD. F1 1.05–1.0 times as long as F2. F13 and F14 with a tyloid. Fore wing length 5.5–6.0 mm. Fore tibia without a bulge. Hind femur 6.0–6.6 times as long as maximum depth in lateral view. Hind TS2: TS1, TS3, TS4 and TS5 = 2.0: 3.3–3.4, 1.3–1.4, 0.8 and 0.8–0.9. T1 2.95–3.0 times as long as maximum width, sparsely punctate (smooth basally) and without a pair of conspicuous teeth at base. T2 1.85–2.05 times as long as maximum width. Face entirely whitish yellow. Antenna without a white band. Mesosternum largely whitish yellow. Posterior margin of T1–T7 with a white band. Hind tarsus blackish brown.

Distribution. Japan (Amamioshima Is. and Tokunoshima Is.).

Etymology. The specific name is from the type locality, Amamioshima Island.

Remarks. This species apparently resembles X. nigritibia Gupta & Gupta, 1983 , from Indonesia, but it can be distinguished by the following combination of character states: epomia weakly present (absent in X. nigritibia ); hind femur reddish brown (black in X. nigritibia ); T3 densely punctate (mat in X. nigritibia ).

Figures

Fig. 1. Giraudia japonica sp. nov. (A, KPM-NK 69946; G, KPM-NK 69947), Apsilops scotinus (Tosquinet, 1903) (B, H, KPM-NK 69931), Hedycryptus ohshimensis (Uchida, 1930) (C, J, NIAES), Dihelus hylaevorus (Momoi, 1966) (D, MNHAH), Ischnus splendens sp. nov. (D, E, K, KPM-NK 69406), Nematopodius (Nematopodius) montanus sp. nov. (F, KPM-NK 69583) and Xoridesopus amamiensis sp. nov. (L, KPM-NK 69529), female ― A–F, head, frontal (A, D), lateral (B, C, E) and posterolateral (F) view; G, H, I–L, areolet of right wing; J, areolet and second recurrent vein of right wing.

Fig. 2. Eurycryptus sakaguchii (Uchida, 1932) (A, D, NIAES), Pterocryptus takachihoensis (Momoi, 1966) (B, G, KPM-NK 5000304), Xoridesopus amamiensis sp. nov. (C, KPM-NK 69529; H, KPM-NK 69531), Hedycryptus ohshimensis (Uchida, 1930) (E, L, M, NIAES), Ischnus splendens sp. nov. (F, KPM-NK 69415), Cryptus dianae (Gravenhorst, 1829) (I–K, KPM- NK 69930) and Dihelus hylaevorus (Momoi, 1966) (N, paratype, MNHAH), female ― A–C, propodeum, lateral view; D, propodeum,T1, T2 and T3, dorsal view, punctures on right side and T3 omitted; E–H, T1, dorsal view; I, K, L, T1, lateral (I, L) and ventrolateral (K) view; J, M, cross-section of anterior part of T1, arrows indicate the carinae; N, apex of metasoma, lateral view. ATC, anterior transverse carina; PTC, posterior transverse carina; PC, pleural carina; TT, triangular tooth; DLC, dorsolateral carina; VLC, ventrolateral carina.

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. 12. Xoridesopus amamiensis sp. nov., KPM-NK 69529 (A–E) and 69545 (F–H), female (A–E) and male (F–H) ― 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.