Setodes shirasensis Kobayashi 1984

Katsuma, Nobuyuki, 2018, The genus Setodes Rambur (Trichoptera, Leptoceridae) in Japan, Zootaxa 4407 (2), pp. 191-212 : 196-197

Setodes shirasensis Kobayashi 1984

( Figs. 3A–3G , 10C )

Setodes shirasensis Kobayashi 1984 , 10–12, male, female, Sado; Uenishi 1993, 82; Tanida 2005, 541, 548, male; Nozaki 2016, 401, male.

Diagnosis. The male and female genitalia of this species are similar to those of S. schmidi Yang & Morse 1989 and S. carinatus Yang & Morse 1989 described from China, but the following characteristics set them apart. In males, the paramere spines do not reach the serrate area on the apicodorsal margin of the phallicata in S. shirasensis . However, the paramere spines do reach the area in both S. schmidi and S. carinatus . The lower part of each inferior appendage is short, horn-shaped in lateral view in S. shirasensis , but longer, extending caudad in S. schmidi and S. carinatus . In females, the mid-ventral line on sternum IX is absent in S. shirasensis but present in both S. schmidi and S. carinatus .

Adult. Head and body very pale. Forewings each 4.5–5.4 mm long (n = 20) in male, 4.8–5.6 mm (n = 20) in female, covered by pale golden hair with many silver spots. Wing venation typical for genus.

Male genitalia. Segment IX pear-shaped in lateral view, with pair of mound projections dorsally, each bearing 5–6 setae, longitudinally long ventrally with many long setae. Segment X sub-triangular in lateral view, with pair of longitudinal carinae dorsolaterally, divided into pair of lobes at apical 1/ 4 in dorsal view, each apex round. Preanal appendages oval in lateral and dorsal views with many short setae. Inferior appendages each divided into two branches; upper branch broad, rectangular in lateral view, serrate dorsally with small triangular lobe dorsomesally and with two small triangular lobes posteroventrally; lower branch horn-shaped in lateral view, apex acute in lateral view, round in ventral view. Phallic shield broad, semicircular in lateral view, covering endotheca and basal half of paramere spines. Phallicata bent caudad at 1/4 distance from base, apicodorsal margins serrate. Paramere spines slender, well sclerotized, not reaching serrate area on apicodorsal margins of phallicata.

Female genitalia. Segment IX longitudinally short dorsally, long ventrally with rounded lobe on each side posterolaterally; anterodorsal margin of segment IX shallowly concave in dorsal view; posterodorsal margin of segment IX with pair of mound projections, each bearing 5–6 setae. Segment X triangular with acute apex in lateral view, tongue-shaped in dorsal view, slightly excised apically. Preanal appendages clavate in lateral view, oval in dorsal view with many short setae. Lamellae semi-trapezoidal in lateral view, bilobed; each upper lobe serrate posterolaterally, with long setae; each lower lobe reticulated laterally, bearing 6–7 short setae posteromesally. Gonopod plate U-shaped in ventral view, apices round. Anterior part of spermathecal sclerite bell-shaped in ventral view, extending anterad beyond anterior margin of segment VIII.

Immature stages. Unknown.

Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu).

Japanese name. Shirase-seto-tobikera.

Type series materials. Holotype male, allotype female, labeled 7330 ♂ ♀, Shirase River , Ryotsu-shi, Sado, Japan, 25.viii.1983, M. Kobayashi ( CBM) .

Other specimens examined. Hokkaido: 1♂, Panketo, Akan-cho, Kushiro-shi, 11.viii.1996, T. Ito & A. Ohkawa ; 5♂ 3♀, Ibeshibetsu-gawa, Akan-cho, Kushiro-shi, 31.viii,1996, T. Ito. Aomori: 230♂ 111♀, Futamata, Obuchi, Rokkasho-mura, 7.viii.2008, N. Katsuma ; 6♂ 2♀, Kabahagi-sawa, Aomori-shi, 13.viii.2011, Y. Murakami; 1♂, ibid, 2.vii.2011, Y. Murakami ; 1♂ 1♀, Tsukimino, Aomori-shi, 9.vii.2011, Y. Murakami; 1♂, Sawayama, Aomori-shi, 5.vii.2017, Y. Murakami. Iwate: 1♀, Yakushi-gawa, Taimagura, Etsunagi, Miyako-shi, 10.viii.1994, T. Hattori . Akita: 1♀, Sannaimitsumata, Yokote-shi, 5.viii.2011, M. Tanaka . Miyagi: 1♀, Natorigawa, Akiu-machi, Taihaku-ku, Sendai-shi, 25.vi.2011, N Katsuma . Fukushima: 2♂ 34♀, Yanohara-kougen, Showa-mura, 19.viii.2008, N. Katsuma . Ibaraki: 1♂, Sato-gawa, Ochiai-cho, Hitachiota-shi, 11.vi.2011, N. Katsuma ; 105♂ 43♀, Ai-kawa, Shimoisehata, Hitachiomiya-shi, 18.vi.2005, N. Katsuma. Kanagawa: 1♂, Amatsubo, Minamiashigara-shi, 26.vi.2003, unknown collector ; 1♂, ibid, 26.v.2003, unknown collector ; 1♀, ibid, 8.ix.2003, unknown collector ; 1♀, ibid, 18.ix.2003, unknown collector ; 1♂, Matsutakeyama, Toya, Midori-ku, Sagamihara-shi, 25.vi.2003, unknown collector. Yamanashi: 1♂, Aimatakyo, Minobu-cho, 6.vii.1997, K. Tojo ; 1♂, ibid, 5.x.1997, K. Tojo . Nagano: 1♀, Shiosawa, Yonezawa, Chino-shi, 13.vii.2014, T. Torii ; 1♂, Aoki-ko, Aoki, Taira, Omachi-shi, 28.viii.2008, N. Katsuma; 1♂, Uchimura-gawa, Ueda-shi, 21.vi.1997, K. Tojo; 1♀, ibid, 25.vi.1997, K. Tojo . Shizuoka: 6♂ 2♀, Kazouno, Shimoda-shi, 20.vi.2009, S. Inaba . Mie: 1♀ , Mie: Washiyama, Seki-cho, Kameyama-shi, 10.ix.2013, T. Ito; Misugi-cho, Tsu-shi, 14.vi.2009, N. Katsuma ; 14♂ 3♀, Kihoku-cho, 10.vi.2017, H. Morita; 3♂, ibid, 2.ix.2017, H. Morita ; 19♂ 16♀, Ushikusa-yama, Minamiise-cho, 30.v.2017, H. Morita. Shiga: 9♂ 11♀, Miyajiri, Shigaraki-cho, Koka-shi, 30.vi.2014, N. Kawase ; 29♂ 2♀, Kanzaki-gawa, Yuzurio-cho, Higashiomi-shi, 6.ix.2013, T. Ito. Kyoto: 6♂ 3♀, Takano-gawa, Oharashourinin-cho, Sakyo-ku, Kyoto-shi, 28.vi.2014, S. Kobayashi . Osaka: 1♂, Kawakubokeikoku, Kawakubo, Takatsuki-shi, 13.viii.2012, S. Morimoto . Hyogo: 2♂, Wadayama-cho, Asago-shi, 4.viii.2004, K. Inazu . Tokushima: 1♂ 1♀, Kitou, Naka-cho, 4.viii.2003, K. Nio . Ehime: 2♂, Odamiyama-keikoku, Uchiko-cho, 9.VIII.2016, E. Yamamoto . Kochi: 7♂ 2♀, Kitaoi, Hane-cho, Muroto-shi, 3.vi.2006, M. Takai . Miyazaki: 1♂ 1♀, Gokase-gawa, Nanaori, Hinokage-cho, 22– 23.v.2015, S. Inaba ; 5♂, Hinokage-gawa, Nanaori, Hinokage-cho, 22–23.v.2015, S. Inaba; 16♂ 13♀, Ayanamigawa, Shimoda, Suki, Kobayashi-shi, 19–20.v.2015, S. Inaba; 9♂ 25♀, Ayanami-gawa, Kitamata, Aya-cho, 19– 20.v.2015, S. Inaba. Kagoshima: 10♂ 2♀, Shinmido, Tarumizu-shi, 28.vi.2014, S. Inaba.

Remarks. This species belongs to the Setodes tejasvin Species Group ( Schmid 1987) since the morphological characteristics of male genitalia are consistent with this group. Yang & Morse (1989) suggested that S. schmidi , S. carinatus , and S. shirasensis constitute a monophyletic group since they share a pair of spinulose-serrate areas on the apicodorsal margins of the phallicata.

Figures

FIGURE 10. Japanese Setodes species, A–D: adults. 10A, S. chirotheca sp. nov. 10B, S. hinumaensis Katsuma 2009. 10C, S. shirasensis Kobayashi 1984.10D, S. argentatusMatsumura 1907.Scale:5 mm.

FIGURE3. Setodes shirasensis Kobayashi 1984, A–D:male (holotype specimen).3A, right fore- and hind wings, dorsal.3B– 3D, male genitalia: 3B, left lateral; 3C, dorsal; 3D, ventral. 3E–3G, female genitalia (allotype specimen): 3E, dorsal; 3F, ventral; 3G, left lateral.Scale:A = 1 mm, B–G = 500 µm.