Spilopteron pyrrhonae Kusigemati 1981
Creators: name: Ito, Masato
name: Maeto, Kaoru
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Spilopteron
Spilopteron pyrrhonae

description: Spilopteron pyrrhonae Kusigemati, 1981
Figs 2i, 3i, 4i, 5i, 6i, 7 o–p, 8h
Spilopteron pyrrhonae Kusigemati, 1981: 123. Type locality: Japan, Kagoshima Pref.
Spilopteron pyrrhonae – Yu et al. 2005, 2012.
Material examined
Holotype
JAPAN: 1 ♀, Takachiho-gawara, Kagoshima Pref., 24 Apr. 1975, Y. Minami (SEHU).
Other material examined
JAPAN: 3 ♀♀, 2 ♂♂, Kamiyu, Hakone-machi, Kanagawa Pref., 20 Dec. 2003 (emerged), K. Watanabe (KPMNH); 1 ♀, 1 ♂, Amagi-kogen, Izu-shi, Shizuoka Pref., Apr. 2008 (emerged), H. Kawai (KPMNH); 1 ♀, 1 ♂, Amagi-toge, Kawazu-shi, Shizuoka Pref., 27 Apr. 2013 (emerged), A. Kosaki (LC041988, LC041989 OMNH); 1 ♀, same locality, 27 Apr. 2013 (emerged), Y. Shiozawa (LC041990 NIAES); 1 ♀, Kurodake, Oita Pref., 8–9 Jun. 1985, T. Hirowatari (NIAES); 1 ♂, Katamukiyama, Ogata-machi, Oita Pref., 6 Jun. 1992, R. Noda (NIAES); 1 ♂, Hikosan, Fukuoka Pref., 19 Apr. 1980 (emerged), R. Noda (NIAES); 1 ♀, 1 ♂, same locality, Jun. 1982 (emerged), R. Noda (NIAES); 1 ♀, same locality, 30 Mar. 1982 (emerged), R. Noda (NIAES).
Differential diagnosis
This species resembles S. brachyurum sp. nov. and S. nigrum sp. nov.; however, it can be distinguished from them by the rounded apical dark mark on the fore wing (extending downwards in S. brachyurum sp. nov. and S. nigrum sp. nov.), and turned up clypeus in lateral view (not turned up in S. brachyurum sp. nov. and S. nigrum sp. nov.). It is also easily distinguished from other Japanese Spilopteron by the above character states.
Description
Female (n = 11)
BODY LENGTH. 10.5–13.0 mm.
HEAD. Vertex 0.6–0.7 times as long as maximum length of eye in dorsal view. Frons without a depression between eye and antennal socket in frontal view (Fig. 2i). Clypeus 0.6 times as long as wide, with two strong lateral projections, and anterior margin turned up (Figs 2i, 3i). Face 0.6–0.7 times as long as wide. Length of malar space 0.9–1.2 times as long as basal mandibular width. Ocello-ocular line/lateral ocellar diameter = 1.4–1.8. Postocellar line/lateral ocellar diameter = 0.9–1.4. Antenna with 32–33 flagellomeres; first flagellomere 1.3 times as long as second flagellomere.
MESOSOMA. Propleuron densely punctate (Fig. 5i). Lateral area of pronotum densely punctate and transversely striate medially (Fig. 5i). Collar weakly punctate. Mesoscutum densely punctate. Subalar prominence extensively punctate (Fig. 5i). Scutellum weakly punctate in dorsal view. Postscutellum flattened in lateral view (Fig. 5i). Metapleuron weakly punctate (Fig. 5i). Propodeum strongly carinate (Fig. 6i). Area externa and area dentipara punctate (Fig. 6i). Area basalis polished (Fig. 6i). Area superomedia weakly carinate (Fig. 6i). Area petiolaris polished (Fig. 6i). Fore wing length 9.5–10.0 mm. Vein cu-a basad of vein Rs&M (Fig. 4i). Vein rs-m opposite vein 2m-cu (Fig. 4i). Hind femur 3.5–3.9 times as long as maximum depth in lateral view, without distinct convexity ventrally. Hind tibia 10.8– 11.8 times as long as maximum depth in lateral view. First hind tarsomere 2.4–2.6 times as long as second and 2.2–2.5 times as long as longer hind tibial spur.
METASOMA. T1 2.2–2.5 times as long as maximum width, 2.0–2.3 times as long as T2. T2 0.6–0.7 times as long as maximum width. T1 weakly and sparsely punctate. T2–T8 weakly densely punctate. S1 without distinct sharp projection basally. Ovipositor sheath 2.0–2.1 times as long as hind tibia.
COLOR. Body black (Fig. 5i). Antennal flagellum with a white band. Inner margin of eye and hind tarsomeres 3–5 white to yellowish white. Fore and mid legs brown. Fore wing with a rounded apical dark mark (Fig. 4i).
Male (n = 7; genitalia, n = 2)
Similar to female. Clypeus 0.6–0.8 times as long as wide. Length of malar space 1.0–1.3 times as long as basal mandibular width. Ocello-ocular line/lateral ocellar diameter = 1.4–2.0. Postocellar line/lateral ocellar diameter = 1.1–1.5. Antenna with 37–39 flagellomeres; first flagellomere 1.2–1.3 times as long as second flagellomere. Hind femur 3.4–4.1 times as long as maximum depth in lateral view. First hind tarsomere 2.1–2.7 times as long as second and 2.7–3.3 times as long as longer hind tibial spur. Metasoma. T1 2.6–3.0 times as long as maximum width, 1.9–2.3 times as long as T2. T2 0.8–1.0 times as long as maximum width. Face, basal area of mandible, hind tarsus and apices of T1 and T2 yellowish white. Fore and mid legs, trochanters and trochantelli yellowish brown.
Subgenital plate pentagonal with basal angle obtuse (Fig. 8h), its length ca 0.7 times as long as aedeagus. Paramere short, basal part strongly projecting towards base of subgenital plate (Fig. 7o). Aedeagus gently curved, its penis valve ca 1.3 times as long as basal apodeme (Fig. 8h).
Distribution
Japan (Honshu, Shikoku and Kyushu).
Bionomics
Kusigemati (1981) reported that this species is a parasitoid of Pyrrhona laeticolor (Cerambycidae). Adults fly in May and June.
description: Published as part of Ito, Masato & Maeto, Kaoru, 2017, Revision of the genus Spilopteron Townes, 1965 (Hymenoptera: Ichneumonidae: Acaenitinae) from Japan, pp. 1-33 in European Journal of Taxonomy 356 on pages 24-25, DOI: 10.5852/ejt.2017.356, http://zenodo.org/record/3836333