Spilopteron nigrum sp. nov.

urn:lsid:zoobank.org:act: B1048E8D-173E-47D0-B0C1-9D38E8802E83

Figs 1 e–f, 2f, 3f, 4f, 5f, 6f

Etymology

The specific epithet of this new species is derived from the entirely black body.

Type material

Holotype

JAPAN: ♀, “ Mt. Mikuniyama, Katsuragi-cho, Wakayama Pref., Japan, 4 July 2003, R. Matsumoto leg.” (OMNH).

Paratypes

JAPAN: 3 ♀♀, Mt Soranumadake, Sapporo-shi, Hokkaido, Malaise trap, 4–27 Jul. 2007, A. Ueda (OMNH); 2 ♀♀, same locality, Malaise trap, 27 Jul.–21. Aug. 2007, A. Ueda (KPMNH); 1 ♀, Ashorocho, Hokkaido, Malaise trap, 15 Jul.–7Aug. 2008, A. Ueda (OMNH); 1 ♀, Nippu, Bifuka-cho, Hokkaido, Malaise trap, 19 Jun.–17 Jul. 2010, N. Kuhara and M. Sueyoshi (OMNH); 1 ♀, Shiretoko, Hokkaido, 13 Aug. 1996, T. Tachi (OMNH); 1 ♀, Nishirappu, Furano, Hokkaido, 26 Jun.–17 Jul. 2009, A. Ueda (OMNH); 2 ♀♀, Okawa, Nishimeya-mura, Aomori Pref., Malaise trap, 21–30 Jun. 2013, T. Nakamura (LC154920, LC154921 EUM); 2 ♀♀, Biwakubo-sawa, Masutomi, Hokuto-shi, Yamanashi Pref., 28 Jul. 2007, K. Watanabe (KPMNH); 2 ♀♀, same locality, Malaise trap, 28 Jul.–7 Aug. 2007, K. Watanabe (KPMNH); 1 ♀, Otaki-fudou, Katsunuma-cho, Koushu-shi, Yamanashi Pref., 9 Jul. 2007, K. Watanabe (KPMNH); 2 ♀♀, Gozaishi-onsen, Nirasaki-shi, Yamanashi Pref., Malaise trap, 8–17 Jul. 2005, K. Hosoda (OMNH); 5 ♀♀, Mt Kariyasu-yama, Kaga-shi, Ishikawa Pref., 28 Jun.–18 Jul. 2002, K. Esaki (OMNH); 1 ♀, same locality, 28 Jun.–19 Jul. 2002, K. Esaki (SEHU); 3 ♀♀, same locality, 19–31 Jul. 2002, K. Esaki (SEHU); 1 ♀, Hikagedaira, Gifu Pref., 24 Sep. 1980, E. Nishida (OMNH); 1 ♀, Utsukushimatsu, Nagawa-cho, Nagano Pref., 23 Aug. 2012, S. Fujie (KPMNH); 2 ♀♀, Nakajima, Onoshi, Fukui Pref., Malaise trap, 22 Jun.–13 Jul. 2014, S. Fujie and T. Hirooka (LC154917, LC154919 KPMNH); 1 ♀, Akasai-keikoku, Haga-cho, Hyogo Pref., 16 Jun. 2009, R. Matsumoto (OMNH); 2 ♀♀, Mt Hyonosen, Yabu-shi, Hyogo Pref., Malaise trap, 16 Jun.–14 Jul. 2013, M. Ito and S. Fujie (NIAES); 3 ♀♀, Niiya, Kami-cho, Hyogo Pref., Malaise trap, 16 Jun.–14 Jul. 2013, M. Ito and S. Fujie (NIAES); 1 ♀, 1 ♂, same locality, Malaise trap, 26 Jun.–18 Jul. 2011, S. Fujie (NIAES); 2 ♀♀, Mt Odaigahara, Nara Pref., Malaise trap, 25 Jul.–1 Aug. 2005, A. Kawazoe (EUM).

Differential diagnosis

This new species most resembles S. pseudonigrum sp. nov., but is easily distinguished from it by the distinct apical marking on the fore wing (the apical portion is only infuscate in S. pseudonigrum sp. nov.).

Description

Female (n = 41)

BODY LENGTH. 10.0–12.0 mm.

HEAD. Vertex 0.4–0.5 times as long as maximum length of eye in dorsal view. Frons without a depression between eye and antennal socket in frontal view (Fig. 2f). Clypeus 0.5–0.6 times as long as wide, with three weak projections of equal size (Fig. 2f). Face 0.6–0.7 times as long as wide. Length of malar space 1.1–1.2 times as long as basal mandibular width. Ocello-ocular line/lateral ocellar diameter = 1.1–1.7. Postocellar line/lateral ocellar diameter = 1.0–1.3. Antenna with 28–30 flagellomeres; first flagellomere 1.3–1.4 times as long as second flagellomere.

MESOSOMA. Propleuron densely punctate (Fig. 5f). Lateral area of pronotum densely punctate and transversely striate medially. Collar weakly punctate. Mesoscutum densely punctate (Fig. 5f). Subalar prominence extensively punctate (Fig. 5f). Scutellum densely punctate in dorsal view. Postscutellum flattened in lateral view (Fig. 5f). Metapleuron strongly punctate (Fig. 5f). Propodeum strongly carinate (Fig. 6f). Area externa and area dentipara sparsely punctate (Fig. 6f). Area basalis and area superomedia polished (Fig. 6f). Area posteroexterna confluent with area petiolaris and polished (Fig. 6f). Fore wing length 6.0– 8.5 mm. Vein cu-a basad of vein Rs&M (Fig. 4f). Vein rs-m opposite or distad of vein 2m-cu (Fig. 4f). Hind femur 3.4–3.6 times as long as maximum depth in lateral view, without distinct convexity ventrally. Hind tibia 9.4–11.3 times as long as maximum depth in lateral view. First hind tarsomere 2.4–2.8 times as long as second and 2.2–2.5 times as long as longer hind tibial spur.

METASOMA. T1 2.0–2.3 times as long as maximum width, 2.4–2.6 times as long as T2. T2 0.6 times as long as maximum width. T1 weakly and sparsely punctate. T2–T8 weakly and densely punctate. S1 without distinct sharp projection basally. Ovipositor sheath 2.1–2.3 times as long as hind tibia.

COLOR. Body black (Fig. 1e). Antennal flagellum with a white band (Fig. 1e). Inner margin of eye and middle area of mandible yellowish white (Fig. 2f). Fore and mid legs grayish brown (Fig. 1e). Apex of hind tarsus sometimes yellowish white (Fig. 1e). Fore wing with an apical dark mark, extending downwards (Fig. 4f).

Male (n = 1).

Similar to female (Fig. 1f). Body length: 9.0 mm. Head 0.7 times as long as wide in dorsal view. Face 0.8 times as long as wide. Antenna with 36 flagellomeres; first flagellomere 1.1 times as long as second flagellomere. Fore wing length 8.0 mm. Hind femur 3.2 times as long as maximum depth in lateral view. First hind tarsomere 3.7 times as long as longer hind tibial spur. T1 2.5 times as long as maximum width, 2.3 times as long as T2. T2 1.0 times as long as maximum width. Antennal flagellum without a white band (Fig. 1f). Face, clypeus, basal area of mandible, apices of T1–3, and fore and middle legs yellowish white.

Male genitalia of this species were not examined due to the limited number of specimens.

Distribution

Japan (Hokkaido and Honshu).

Bionomics

Host unknown. Adults mainly fly in July and August.