Goera japonica Banks 1906

Nozaki, Takao & Tanida, Kazumi, 2006, The genus Goera Stephens (Trichoptera: Goeridae) in Japan, Zootaxa 1339, pp. 1-29 : 3-5

Goera japonica Banks 1906

Fig. 1

Goera japonica Banks 1906 , 108–109, male; Tsuda and Akagi 1955, 235–236, larva, case; Chihara 1956, 81–82, pupa; Tsuda and Akagi 1962, 140, larva, case; Kobayashi 1971, 35–36, male, female; Tani 1977, 205, male; Kobayashi 1984, 20, male, female; Tanida 1985, 197, larva, case.

Goera nipponensis Navás 1933 , 107–108, male, female. Syn. nov.

Adult. Body, wings, antennae yellowish brown. Head short; ocelli absent; anterior setal warts round in female, absent in male; posterior setal warts large and oval. Antennae 8–11 mm long; scape ca. 1.5 mm long, with long setae. In male maxillary palpi, distal segment oval, membranous and elastic with long setae on outer surface and brown scale lope on mesal surface; apical tube-like lobe bearing many black scales is housed in the mesal surface, expanded one very long. Male abdominal sternite VI with 9–19 long spines in comb-like arrangement, central one usually longest and broad but number, length and shape variable; sternite V with several small spines. Female abdominal sternite VI with 6–20 small spines, sternite V usually bears several tiny spines.

Male genitalia. Segment IX long, oblique in lateral aspect; ventromesal lobe long, about 5 times as long as wide in ventral aspect. Dorsal process of tergum X absent. Paired ventrolateral processes of tergum X long, strongly sclerotized, branched in apical third, each branch acute. Preanal appendages long, about 2/3 as long as ventrolateral processes. Inferior appendages large; basal segment elongate, oblique, large; distal segment distinct, bearing long dorsal lobe with rounded apex, mesal process strongly sclerotized with acute apex directed laterad. Phallus simple, tubular, dorsum of apical half membranous, phallic apodema triangular in lateral aspect.

Female genitalia. Tergum X bilobed, each 2 times as long as wide, apices triangular in lateral aspect. Supragenital plate long, relatively acute in ventral aspect. Lamellae slightly bilobed, rounded apically. Gonopod plate about as long as wide; apicomesal process trapezoid. Spermathecal sclerite slender with paired lateral lip in ventral aspect, bearing rectangular box anteriorly.

Larva. Larval stage has been described by Tsuda and Akagi (1955) and Tanida (1985).

Specimens examined. Hokkaido: 1 male, 3 females, Nishifuren-gawa, Bekkai-cho, 12.vii.1985, T. Nozaki (TN); 2 males, 3 females, Saromabetsu-gawa, Hanazono, saromacho, 7.viii.1985, T. Nozaki (TN); 10 males, 16 females, Masuhoro-gawa, Koetoi, Wakkanai-shi, 9.viii.1999, T. Ito and A. Ohkawa (TN); 1 female, Kaminisama, Iwaonai, Asahi-cho, Shibetsu-shi, 9.vii.1985, T. Nozaki (TN); 1 male, 2 females, Iwafuchi-gawa, Kumaishi-cho, 1–10.vii.1995, Y. Ito and T. Ito (TN); Miyagi: 1 female, Yoko-kawa, 500 m a.s.l., Shichigashuku-machi, 5.vii.1998, T. Hattori (TN); Akita: 2 male pupae, Lake Towada-ko, Wainai, Kosaka-machi, 7.vii.1998, H. Kato (TN); Fukushima: 3 males, 2 females, Surikami-gawa, Nakamoniwa, Iisaka-cho, Fukushima-shi, 31.v.1997, T. Kishimoto(TN); Tochigi: 1 male, 7 females, Kinomata-gawa, Kitamuro, Kuroiso-shi, 6.vi.1987, T. Nozaki (TN); Gumma: 3 males, 4 females, Sanba-gawa, Onishi, Fujioka-shi, 29.v.1991, S. Ishiwata (TN); Tokyo: 1 female, Yagawa, Kunitachi-shi, 14.vi.1986, N. Kobayashi (TN); 7 males, 3 females, Tama-gawa, Nagata-bashi, Fussa-shi, 23.vii.1993, T. Nozaki et al. (TN); Kanagawa: 1 male, 1 female, Sagami-gawa, Okada, Atsugi-shi, pupae collected on 23.iii.1981 emerged on 30.iii–7.iv.1981 by T. Nozaki (TN); 2 males, Sakaigawa, Komatsu, Shiroyama-machi, larvae collected on 21.iii.1984, emerged on 10–13.iv.1984 by T. Nozaki (TN); 10 females, Sawai-gawa, wada, Fujino-machi, 11.vii.1984, T. Nozkai (TN); 2 females, Magino, Fujino-machi, 8.vii.1988, T. Nozaki (TN); Niigata: 2 females, Noguchi, Arakawa-machi, 31.v–15.vi.1985, S. Togashi (TN); Sado: 1 female, Tassha-gawa, Sado-shi, 1.viii.1988, N. Nishimura (TN); Nagano: 2 females, Lake Kizaki, Omachi-shi, 12.x.1987, M. Uenishi (TN); 1 male, 2 females, Ogurogawa, 900m a.s.l., Ina-shi, 14.vii–19.ix.1999, T. Tsuruishi; 1 female, Shira-kawa, 1060m a.s.l., Mitake, Kiso-machi, 4.viii.1998, T. Nozaki (TN); Gifu: 1 male, Hatsushika-dani, 300 m a.s.l., Motosu-shi, 4.v.1996, T. Hattori (TN); Shizuoka: 6 females, Okitsu-gawa, Shimizu-shi, 4.x.1986, T. Nozaki (TN); 1 female, Sugari-gawa, Tadarai, Hamamatsu-shi, 8.v.1987, T. Nozaki (TN); Aichi: 1 female, Mudoji, Kasamatsu-cho, S. Funakoshi and M. Nakamura (TN); Mie: 3 males, 136 females, Shiroishi, Fujiwara-cho, Inabe-shi, 26.iv.–4.vii.1992, H. Morita (TN); Hyogo: 1 male, Nanagama, Shinonsen-cho, 29.vii.1989, C. Kugo (TN); Nara: 3 males, 1 female, Takami-gawa, Higashiyoshino-mura, 15.vi.1996, T. Nozaki (TN); Hiroshima: 1 male, 1 female, Nagaya, Yoshida-cho, Akitakata-shi, 31.vii.1999, S. Nakamura (TN); 1male, 2 females, Shimominauchi, Yukicho, Saeki-ku, Hiroshima-shi, 25.iv.1999, S. Nakamura (TN); Tokushima: 1 female, Takanose-kyo, Kito-son, 18.vii.1998, I. Yamashita (TN); Ehime: 3 females, Teppoishigawa, Kumakogen-cho, 22.v.1999, T. Ito and A. Ohkawa (TN); Kochi: 1 male, Yosagoetoge, Ino-cho, 10.vii.1999, I. Yamashita (TN); Tsushima: 4 males, Izuhara-machi, Tsushima-shi, 18.ix.1992, H. Maruyama (TN); Yaku-shima: 6 females, Shiratani-unsuikyo, 620m a.s.l., Kamiyaku-cho, 12.vii.1992, T. Ogata (TN); 14 males, Yukawa-bashi, Miyanoura-gawa, Kamiyaku-cho, 9.v.2006, T. Ito (TN).

Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu, Sado, Tsushima, Yakushima), Russia (Sakhalin, Kuriles).

Japanese name. Ningyo-tobikera.

Remarks. This species is the most common Goera species in Japanese main islands and is also distributed in adjacent islands. Tsuda and Akagi (1955) synonymized Goera squamifera Martynov 1909 collected from Siberia with this species, and several records as G. japonica from Russia and Korea have been published in recent years ( Kumanski 1991; Arefina 1997; Choe et al. 1999). However, their illustrations suggest that the continental species is the same species as Goera interrogationis Botosaneanu 1970 . Although G. interrogationis is very similar to G. japonica in male and female genitalia, it differs from the latter in unbranched ventrolateral processes of male tergum X, in many tiny spines on phallus, and in the shape of female segment X in lateral aspect. Although we examined several specimens collected from Russia (Ussuri River) and Korea, G. japonica was not found at all. Since Martynov (1935) recorded G. squamifera also from Amur region, this species may be the same species as G. interrogationis not G. japonica . Confirmation of this possible synonymy awaits examination of the holotype of G. squamifera .

Navás (1933) described Goera nipponensis based on material collected from Kofou (?Kofu, Yamanashi, central Honshu). In the original description of G. japonica by Banks (1906), comb-like spines on male abdominal segment was described as ‘comb on venter of male has 5 teeth each side, and the middle one is not much longer than the others’. On the other hand, Navás (1933) pointed out that his species has 13 teeth with longer central one on the male abdominal sternite. The character is, however, variable, and we could not recognize any related species of G. japonica in Honshu. Navás’s description, especially the illustration of male abdominal segments, agrees with that described here for G. japonica . This strongly suggests that G. nipponensis must be a junior subjective synonym of G. japonica , although we could not examine its holotype.

Figures

FIGURES 1 – 2. 1, Goera japonica. Male sternite VI: a, b, ventral view. Male genitalia: c, lateral view; d, dorsal view; e, ventral view; f, phallus, lateral view; g, phallus, dorsal view. Female genitalia: h, lateral view; i, dorsal view; j, ventral view. 2, Goera ogasawaraensis. Male sternite VI: a, ventral view. Male genitalia: b, lateral view; c, dorsal view; d, ventral view; e, phallus, dorsolateral view. Female genitalia: f, lateral view; g, ventral view; h, dorsal view.