Spilopteron albiventre Ito & Maeto 2017, sp. nov.

Spilopteron albiventre sp. nov.

urn:lsid:zoobank.org:act: 5EAE1212-248A-4020-8684-0FCE656C56A9

Figs 1 a–b, 2a, 3a, 4a, 5a, 6a, 7a–b, 8a

Etymology

This specific epithet of this new species is derived from the yellowish white metasomal apex.

Type material

Holotype

JAPAN: ♀, “ Hyakumatsu-zawa, Sapporo-shi, Hokkaido, Japan, 20. July 2001, T. Yoshida leg.” (SEHU).

Paratypes

JAPAN: 2 ♀♀, same locality as holotype, Malaise trap, 12– 18 Jul. 2001, T. Yoshida (SEHU); 1 ♀, same locality as holotype, Malaise trap, 4–18 Aug. 2001, T. Yoshida (SEHU); 1 ♀, Kannon-zawa, Sapporpshi, Hokkaido, Malaise trap, 24 Aug.–7 Sep. 1993, N. Kuhara (NIAES); 1 ♀, same locality, Malaise trap, 1–8 Aug. 2000, K. Uesugi (KPMNH); 1 ♀, Mt Soranuma-dake, Sapporo-shi, Hokkaido, Malaise trap, 27 Jul.–21 Aug. 2007, A. Ueda (OMNH); 1 ♂, Onneto, Ashoro-cho, Hokkaido, Malaise trap, 23 Jul.–30 Aug. 2002, K. Uesugi (KPMNH); 1 ♂, Nippu, Bifuka-cho, Hokkaido, Malaise trap, 19 Jun.–17 Jul. 2010, N. Kuhara and M. Sueyoshi (OMNH); 1 ♂, Mt Hachimori-yama, Asahi-mura, Nagano Pref., 25 Jul. 1998, T. Tachi (OMNH); 1 ♂, Maruno-cho, Nirasaki-shi, Yamanashi Pref., 26 Jun.–20 Jul. 2007, K. Hosoda (OMNH); 8 ♂♂, Mt Odamiyama, Ehime Pref., 27 Jun. 1997, E. Yamamoto (NIAES); 1 ♀, same locality, 10 Jun. 1997, E. Yamamoto (NIAES); 1 ♀, same locality, 1 Jul. 1995, E. Yamamoto (NIAES); Onogahara, Ehime Pref., 6–7 Jul. 1979, Y. Seiyama (EUM).

Differential diagnosis

The new species most resembles S. brachyurum sp. nov. and S. pyrrhonae, but it is distinguished from them by the long malar space, 1.3–1.4 times as long as the basal mandibular width (0.9–1.2 times in S. brachyurum and S. pyrrhonae), and the yellowish white marking on the apex of the metasoma (entirely black in S. brachyurum and S. pyrrhonae).

Description

Female (n = 11)

BODY LENGTH. 7.5–10.0 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. 2a). Clypeus 0.5–0.7 times as long as wide, with three weak projections of equal size (Figs 2a, 3a). Face 0.7–0.8 times as long as wide. Length of malar space 1.3–1.4 times as long as basal mandibular width. Ocello-ocular line/lateral ocellar diameter

= 1.1–1.3. Postocellar line/lateral ocellar diameter = 0.7–1.0. Antenna with 30–31 flagellomeres; first flagellomere 1.3–1.5 times as long as second flagellomere.

MESOSOMA. Propleuron densely punctate (Fig. 5a). Lateral area of pronotum weakly punctate and transversely striate medially. Collar sparsely punctate. Mesoscutum densely punctate (Fig. 5a). Subalar prominence densely punctate (Fig. 5a). Scutellum weakly punctate in dorsal view. Postscutellum flattened in lateral view (Fig. 5a). Metapleuron strongly punctate (Fig. 5a). Propodeum indistinctly carinate (Fig. 6a). Area superomedia confluent with area petiolaris. Fore wing length 6.5–9.0 mm. Vein cu-a basal to vein Rs&M (Fig. 4a). Vein rs-m opposite or basal to vein 2m-cu (Fig. 4a). Hind femur 3.2–3.5 times as long as maximum depth in lateral view, without distinct convexity ventrally. Hind tibia 10.0–11.7 times as long as maximum depth in lateral view. First hind tarsomere 2.1–2.6 times as long as second and 1.9–2.2 times as long as longer hind tibial spur.

METASOMA. T1 1.9–2.2 times as long as maximum width, 1.9–2.2 times as long as T2. T2 0.7 times as long as maximum width. T1 sparsely punctate. T2–T8 densely punctate. S1 without distinct sharp projection basally. Ovipositor sheath 2.1–2.5 times as long as hind tibia.

COLOR. Body black (Fig. 1a). Antennal flagellum with a white band (Fig. 1a). Inner margin of eye yellowish white, pale color sometimes extended to most of face (Fig. 2a). Clypeus, basal area of mandible, scutellum, postscutellum, propodeum, apices of metasomal tergites, apex of metasoma, and subgenital plate yellowish white (propodeum and T1 sometimes entirely black). Fore and mid legs yellowish brown (Fig. 1a). Fore wing with a rounded apical dark mark (Fig. 4a).

Male (n = 12; genitalia, n = 2)

Similar to female (Fig. 1b). Body length 6.0–10.0 mm. Head 0.6–0.7 times as long as wide in dorsal view. Vertex 0.4–0.5 times as long as maximum length of eye in dorsal view. Ocello-ocular line/ lateral ocellar diameter = 1.0–1.4. Postocellar line/lateral ocellar diameter = 0.8–1.2. Antenna with 31–35 flagellomeres. Hind femur 3.4–3.6 times as long as maximum depth in lateral view. Hind tibia 10.0–11.7 times as long as maximum depth in lateral view. First hind tarsomere 1.9–2.2 times as long as longer hind tibial spur. T1 2.0–2.5 times as long as maximum width, 1.8–2.1 times as long as T2. T2 0.7–0.8 times as long as maximum width. Face entirely yellow.

Subgenital plate pentagonal with a basal angle obtuse (Fig. 8a). Paramere short, basal part strongly projected toward the base of subgenital plate (Fig. 7a). Aedeagus gently curved, its penis valve ca 2.0 times as long as basal apodeme (Fig. 7b).

Distribution

Japan (Hokkaido, Honshu, and Shikoku).

Bionomics

Host unknown. Adults fly mainly in July and August.