The genus Pseudoxyethira Schmid (Trichoptera, Hydroptilidae) in Japan Author Ito, Tomiko text Zootaxa 2017 2017-11-11 4319 1 194 200 journal article 32140 10.11646/zootaxa.4319.1.12 7a0624d4-e72a-4a7f-9bec-a0524014eaec 1175-5326 888587 44605Db1-7E00-4F2D-9D44-4F2B80B99100 Pseudoxyethira ishiharai ( Utsunomiya 1994 ) ( Figs. 1–8 , 19 ) Scelotrichia ishiharai Utsunomiya 1994 , 345–318, male, female, larva, case, Shikoku (Kochi); Ohkawa and Ito 2002 , 449–458, male, female, larva, case, habitat, feeding behavior, Hokkaido (Ishikari, Shiribeshi), Honshu (Yamagata, Tokyo, Kanagawa, Nagano, Gifu, Shizuoka, Aichi), Shikoku (Ehime, Kochi), Kyushu (Nagasaki, Miyazaki); Katsuma 2006 , 35, Honshu (Ibaraki); Satake and Kuranishi 2007 , 282, Izu Islands (Mikura-jima); Kuhara 2011 , 52, 72, Hokkaido (Sorachi); Kuhara and Ito 2017 , 16, Yakushima. Pseudoxyethira ishiharai : Zhou et al. 2016 , 214. Male ( Figs. 1–8 ). Black. Length of each forewing and hind wing 1.7–2.2 mm and 1.4–2.0 mm, respectively (n = 10); androconia present. Antennae 18-segmented, 0.8 mm long (n = 10). Spur formula 0, 2, 4 or 1, 2, 4, variable individually and locally. Genitalia. Dorsal plate short, membranous, subquadrate. Inferior appendages long, in ventral view length 4 times maximum width; gradually broadened at first, widest at middle, gradually narrowing in distal half; mesal edges of distal half strongly sclerotized, serrated due to presence of many small spines; subacute or round apically. Phallus long, apically divided into lateral lobe and middle membranous lobe: lateral lobes each with spine apically; middle membranous lobe often difficult to observe. Specimens examined . Hokkaido : 13 males , Imakane-cho , Oshubunnai-no-taki, 5.vii.2006 , TI & TH ; 5 males, Ishikari-shi, Hamamasu-ku, Shiragane-no-taki, 7.vii.2006 , TI; 1 male , same locality, 8.vii.2009 , TI ; 3 males , Iwanai-cho , Narugami-no-taki, 3.viii.2006 , TI & TH ; 1 male , Fukuhsima-cho , Fudo-no-taki, 4.viii.2006 , TI & TH. Honshu . Ishikawa : 15 males , Wajima-shi, Machino-cho, Sosogi, 5 m a.s.l. , 10.vi.2011 , TH. Yamanashi : 1 male , Minobu-cho, Ojiro, 460 m a.s.l. , 12.vi.2010 , TH. Shizuoka : 2 males , Shizuoka-shi, Mizumiiro-gawa, Ubaga-fuchi, 31.v.1995 , TH. Shiga : 1 male , Higashi-omi-shi, Eigenji, Kanzaki-gawa, small fall, 3.ix.2013 , TI ; 1 male , same locality, 11.vi.2016 , TI. Okayama : 3 males , Nishi-awakura-son, Okaya , 24.vii.2016 , K. Nojima. Shimane : 1 male , Misato-cho , Nagato , Hibiki-dani , 6.viii.2001 , AO. Shikoku . Tokushima : 1 male , Naka-cho , Konose-kyo , 22.v.2008 , M. Takai & TI. Ehime : 1 male , Uwajima-shi , Nametoko-keikoku , 400–600 m a.s.l. , 23.ix.2002 , TH. Kyushu . Nagasaki : 3 males , Korai-cho, Todoroki-kyo, 18.ix.2000 , AO. Oita : 1 male , Kusu-machi, Mori, Shimizu-bakuen, 450 m a.s.l. , 18.iv.2004 , TH. Ryukyu Islands . Amami-oshima : 7 males , Yamato-son, Materiano-taki, 25–26.x.2011 , TI. Okinawa-jima : 4 males , Kunigami-son , Yona-gawa , Heigi-hashi , 10.iv.2011 , TI ; 1 male , same locality, 18.iii.2015 , TI ; 4 males, Nakijin-son, Shigema-gawa, upper reach, 17.iii.2014 , TI; 3 males , Nakijin-son, Shigema-gawa, lower reach, 8.iv.2011 , TI. Ishigaki-jima : 1 male , Omoto-dake , small fall near foot path, 26.x.2012 , TI ; 3 males , Fukidori-gawa , middle reach, 20.iii.2016 , TI. Iriomote-jima : 1 male , Nishifunatsuki-gawa , Nishi-funatsuki-bashi, 30.x.2012 , TI ; 9 males , Yuchin-gawa , small fall, 23.x.2015 , TI ; 1 male , same locality, 23.iii.2016 , TI. Remarks. This species is distinguished from congeneric species by the shape of the inferior appendages and the phallus: Inferior appendages with serrated mesal edges and apex of phallus divided into 3 parts. Distribution ( Fig. 19 ). Hokkaido , Honshu, Shikoku, Kyushu, Ryukyu Islands (Yakushima, Amami-oshima, Okinawa-jima, Ishigaki-jima, Iriomote-jima), Izu Islands. New to middle and southern Ryukyu Islands. Habitat. Adults of this species were collected near waterfalls and rapid streams with large rocks. Japanese name. Koke-himetobikera.