Alloplasta satana, Watanabe, 2022

Watanabe, Kyohei, 2022, Revision of the genus Alloplasta Förster, 1869 (Hymenoptera, Ichneumonidae Banchinae) from Japan, Zootaxa 5188 (1), pp. 55-73 : 68-70

Alloplasta satana sp. nov.

( Figs 9 A–C )

Type series. Holotype: F, JAPAN, Tsushima Is., Nagasaki Pref., Kamitsushima Town, Izumi, Shitazaki , 8 May 2015, T. Kurihara leg. ( KPMNH) . Paratypes: JAPAN: [Honshu] 1 F, Tokyo, Chiyoda-Ku, Imperial Palace , 6–13 Apr. 2010, MT ( NSMT) ; 1 F, ditto, 14–26 Apr. 2011 ( NSMT) ; 1 F, Mie Pref., Ise City, Tsurugi-toge , 3 May 2002, A. Kawazoe leg. ( KPMNH) ; 1 F, Osaka Pref., Shimamoto Town, Shakudai , 7 Apr. 2003, R. Matsumoto leg. ( OMNH) . [Kyushu] 1 F, Kagoshima Pref., Terayama , 1 May 1970, K. Kusigemati leg. ( SEHU) . [Iki Is.] 1 F, Nagasaki Pref., Katsumoto Town, Higashifure , 25 Mar. 2021, K. Otsui leg. ( KPMNH) .

Description. Female (n = 7). Body length 8.0–10.5 (HT: 9.9) mm, polished and covered with punctures and silver setae.

Head 0.55–0.6 (HT: 0.6) × as long as wide. Clypeus 2.3–2.5 (HT: 2.4) × as broad as high, sparsely punctate, slightly convex in lateral view. Face 2.1–2.15 (HT: 2.1) × as broad as high, densely punctate ( Fig. 9 B ), convex medially in lateral view. Malar space 0.5–0.6 (HT: 0.6) × as long as basal mandibular width. POL 1.7–2.05 (HT: 1.7) × as long as OD. OOL 1.25–1.4 (HT: 1.25) × as long as OD. Vertex with long setae, ca. 2.0 × as height as lateral ocellus in lateral view. Antenna with 33 flagellomeres. FL I 3.6–4.0 (HT: 4.0) × as long as maximum depth in lateral view and 1.6–1.65 (HT: 1.65) × as long as FL II.

Mesosoma densely punctate. Epomia absent. Speculum with a conspicuous smooth area. Mesosternum with long and dense setae, ca. 1.2 × as long as maximum depth of FL I in lateral view. Propodeum rugulose-punctate dorsally, posterior transverse carina largely absent except for short, trace-like ridge ( Fig. 9 C ). Fore wing length 7.0–9.0 (HT: 8.3) mm. Areolet received vein 2m-cu slightly distant of the outer angle. Nervellus intercepted at middle. Hind femur 5.4–5.8 (HT: 5.8) × as long as maximum depth in lateral view. Ratio of length of hind first to fifth tarsomeres 4.1–4.25 (HT: 4.2): 2.0: 1.3–1.4 (HT: 1.3): 0.8: 1.05–1.1 (HT: 1.05). Hind second tarsomere 3.3–3.6 (HT: 3.3) × as long as maximum depth in lateral view. Tarsal claws pectinate.

Metasoma. T I 1.25–1.35 (HT: 1.25) × as long as maximum width, densely punctate except for smooth areas on apex and base, with minute transverse striae dorsally. T II 0.7–0.8 (HT: 0.8) × as long as maximum width. T II to T V finely punctate, with minute transverse striae. Ovipositor sheath 1.7–1.8 (HT: 1.8) × as long as hind tibia.

Coloration ( Figs 9 A–C ). Body (excluding wings and legs) black. Clypeus reddish brown with except for dorsal black area. Mandible except for apex and base weakly tinged with reddish brown. Face usually entirely black, rarely with a pair of small yellow markings along eye near antennal socket. Mesoscutum usually entirely black, rarely with a pair of yellow markings antero-laterally. Each posterior margin of T II to T VI black or narrowly, slightly tinged with reddish brown. Ovipositor reddish brown. Wings hyaline. Veins and pterostigma blackish-brown except for brown wing base. Legs black except for tibiae with white base (white area sometimes indistinct). Tibial spurs partly tinged yellowish brown.

Male. Unknown.

Distribution. Japan (Honshu, Kyushu and Iki Island).

Bionomics. Host unknown. Adults were collected in April and May.

Etymology. The species name is derived from the Latin “satana”, meaning devil in English. The almost entirely black coloration of the body is reminiscent of the devil.

Remarks. This species resembles A. nigripes and A. septentrionalis sp. nov. but can be distinguished from these species by the following combination of character states: hind tarsus entirely black (with a white area in A. septentrionalis ); ovipositor sheath 1.7–1.8 × as long as hind tibia (1.0–1.2 × in A. nigripes , 1.05–1.1 × in A. septentrionalis ).

Figures

FIGURE 9. Alloplasta satana sp. nov., female, holotype—A: lateral habitus; B: head, frontal view; C: propodeum, dorso-lateral view.