Family Hydroptilidae Stephens
Author: Tomiko ITO
E-mail: tobikera[AT]siren.ocn.ne.jp
Last updated: 4 October 2026
Ptilocolepinae Martynov, treated as a subfamily of Hydroptilidae for a long time, is treated as family status in recent time (Holzenthal et al. 2011; Wichard 2013). Hydroptila usuguronis Matsumura 1931 was transferred to the genus Psychomyia Latreille (Psychomyiidae) by Ito et al. (2011).
Genus Allotrichia McLachlan
Allotrichia rhynchophyllum Zhou, Yang and Morse 2016
Ugandatrichia shinshiroensis Ito, Nishimoto and Nishimoto 2018
Distribution. China (Hei-long-jiang), Japan (Honshu, Shikoku).
Genus Hydroptila Dalman
Hydroptila asymmetrica Kumanski 1990
Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu, Tsushima, Tanegashima, Yakushima, Amami-Oshima, Tokunoshima, Okinawa-jima, Ishigaki-jima), Russia (South Primorye), North Korea.
Hydroptila botosaneanui Kumanski 1990
Distribution. Japan (Hokkaido, Honshu), North Korea, Russia (South Primorye).
Hydroptila chinensis Xue and Yang 1990
Distribution. Japan (Hokkaido, Honshu (central)), Russia (Khabarovsk, South Primorye), China (Heilongjiang).
Hydroptila coreana Kumanski 1990
Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu), Russia (Khabarovsk), North Korea.
Hydroptila itoi Kobayashi 1977
Oxyethira ezoensis Kobayashi 1977
Distribution. Japan (Hokkaido, Honshu), China (Heilongjiang, Yunnan, Jiangsu, Henan, Hubei, Sichuan, Guizhou), Russia (Caucasus, South Primorye), Europe.
Hydroptila demersa Ito and Sasaki 2023
Distribution. Japan (Ogasawara Islands: Chichi-jima, Ani-jima).
Hydroptila dorsoprocessuata Botosaneanu 1993
Distribution. Japan (Honshu), Russia (Siberia, South Primorye).
Hydroptila hahajima Ito and Sasaki 2023
Distribution. Japan (Ogasawara Islands: Haha-jima).
Distribution. Japan (Honshu).
Hydroptila introspinata Zhou and Sun 2009
Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu), China (Hei-long-jiang), Korea.
Hydroptila ishiura Ito and Sasaki 2023
Distribution. Japan (Ogasawara Islands: Chichi-jima, Ani-jima).
Hydroptila kakidaensis Nozaki and Tanida 2007
Distribution. Japan (Honshu, Shikoku, Kyushu).
Hydroptila nagahama Ito and Sasaki 2023
Distribution. Japan (Ogasawara Islands: Haha-jima).
Distribution. Japan (Ryukyu Islands).
Hydroptila nanseiensis Ito 2011
Distribution. Japan (Ryukyu Islands).
Hydroptila ogasawaraensis Ito 2011
Distribution. Japan (Ogasawara Islands: Chichi-jima).
Hydroptila oguranis Kobayashi 1974
Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu, Tsushima, Amami-Oshima).
Hydroptila parapiculata Yang and Xue 1994
Distribution. Japan (Honshu), China (Anhui, Fujian, Sichuan, Guizhou, Guangxi).
Hydroptila phenianica Botosaneanu 1970
Hydroptila matsuii Kobayashi 1974
Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu, Tsushima, Fukue-jima, Amami-Oshima), Russia (Khabarovsk, South Primorye), North Korea (Phjongjang).
Hydroptila pseudseirene Ito 2015
Distribution. Japan (Ryukyu Islands: Ishigaki-jima, Iriomote-jima).
Hydroptila spinosa Arefina and Armitage 2003
Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu), Russia (Sakhalin).
Distribution. Japan (Ryukyu Islands: Okinawa-jima, Amami-o-shima).
Distribution. Japan (Yonaguni-jima, Ishigaki-jima, Iriomote-jima), Russia (Far East, continental part), China (Guangdong, Hainan, Henan, Hubei, Jiangsu, Anhui, Jiangxi, Fujian, Guangxi, Yunnan, Hong Kong), Taiwan, Raos, Thailand, Vietnum, Nepal, Sumatora.
Hydroptila tokoyo Ito and Sasaki 2023
Distribution. Japan (Ogasawara Islands: Chichi-jima).
Hydroptila yaeyamensis Ito 2015
Distribution. Japan (Ryukyu Islands: Ishigaki-jima, Iriomote-jima).
Genus Microptila Ris
Distribution. Japan (Ryukyu Islands: Okinawa-jima, Iriomote-jima).
Distribution. Japan (Ryukyu Islands: Iriomote-jima).
Microptila orienthula Kjærandsen and Ito 2009
Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu, Yakushima).
Genus Orthotrichia Eaton
Records of Orthotrichia tetensii Kolb. 1927 in Gifu (Iwata 1927) is incorrect, because Iwata's figures and habitat description are apparently those of the genus Hydroptila.
Orthotrichia coreana Ito and Park 2016
Distribution. Japan (Honshu, Kyushu), Korea.
Orthotrichia costalis (Curtis 1834)
Hydroptila costalis Curtis, 1834
Distribution. Japan (Hokkaido, Honshu), Palearctic.
Orthotrichia iriomotensis Ito 2013
Distribution. Japan (Ryukyu Islands: Iriomote-jima).
Orthotrichia tragetti Mosely 1930
Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu, Amami-Oshima, Minami-daito-jima), Palearctic.
Genus Oxyethira Eaton
Oxyethira acuta Kobayashi 1977
Distribution. Japan (Hokkaido, Honshu, Kyushu).
Oxyethira angustella Martynov 1933
Oxyethira kakida Oláh and Ito 2013
Oxyethira josifovi: Nozaki and Tanida 2007
Oxyethira datra: Malicky and Chantaramongkol 2007
Distribution. Japan (Hokkaido, Honshu).
Oxyethira chitosea Oláh and Ito 2013
Distribution. Japan (Hokkaido, Honshu).
Oxyethira hiroshima Oláh and Ito 2013
Distribution. Japan (Honshu).
Oxyethira mekunna Oláh and Ito 2013
Distribution. Japan (Hokkaido).
Oxyethira miea Oláh and Ito 2013
Distribution. Japan (central Honshu), Korea.
Oxyethira okinawa Oláh and Ito 2013
Distribution. Japan (Yakushima, Amami-Oshima, Okinawa-jima).
Oxyethira ozea Oláh and Ito 2013
Distribution. Japan (central Honshu).
Oxyethira shumari Ito and Oláh 2017
Distribution. Japan (Hokkaido).
Oxyethira tsuruga Ito and Oláh 2017
Distribution. Japan (Hokkaido, Honshu).
Genus Plethus Hagen
Plethus ukalegon Malicky and Chantaramongkol 2007
Distribution. Japan (Ryukyu Islands: Iriomote-jima, Ishigaki-jima), Taiwan.
Genus Pseudoxyethira Schmid
Genus Pseudoxyethira Schmid was revised recently to replace Scelotrichia Ulmer 1951, because the latter genus name is preoccupied by Scelotrichia Reuter 1890, in Hemiptera (Zhou et al. 2016).
Pseudoxyethira funatsuki Ito 2017
Distribution. Japan (Ryukyu Islands: Ishigaki-jima, Iriomote-jima).
Pseudoxyethira ishiharai (Utsunomiya 1994)
Scelotrichia ishiharai Utsunomiya 1994
Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu, Izu Islands, Yakushima, Amami-Oshima, Okinawa-jima, Ishigaki-jima, Iriomote-jima).
Pseudoxyethira thingana (Oláh 1989)
Scelotrichia thingana Oláh, 1989
Distribution. Japan (Honshu, Kyushu, Yakushima, Amami-Oshima, Ishigaki-jima, Iriomote-jima), Vietnam, China (Jiang-xi).
Genus Stactobia McLachlan
Distribution. Japan (Ryukyu Islands: Iriomote-jima).
Distribution. Japan (Honshu, Shikoku).
Stactobia distinguenda Botosaneanu and Nozaki 1996
Distribution. Japan (Hokkaido, Honshu, Kyushu).
Distribution. Japan (Honshu).
Stactobia hattorii Botosaneanu and Nozaki 1996
Distribution. Japan (Honshu).
Stactobia inexpectata Botosaneanu and Nozaki 1996
Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu, Yakushima).
Distribution. Japan (Honshu, Shikoku, Kyushu).
Distribution. Japan (Honshu, Kyushu).
Stactobia makartschenkoi Botosaneanu and Levanidova 1988
Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu), Russia (South Kurils), Mongolia.
Stactobia nishimotoi Botosaneanu and Nozaki 1996
Distribution. Japan (Honshu, Shikoku, Kyushu, Yakushima), Korea.
Stactobia semele Malicky and Chantaramongkol 2007
Distribution. Japan (Ryukyu Islands: Iriomote-jima), Taiwan.
Distribution. Japan (Ryukyu Islands: Ishigaki-jima, Iriomote-jima, Yonaguni-jima).
Distribution. Japan (Ryukyu Islands: Amami-Oshima, Okinawa-jima).
Genus Stactobiella Martynov
Distribution. Japan (central Honshu).
Distribution. Japan (Ryukyu Islands: Amami-o-shima).
Stactobiella biramosa Martynov 1929
Distribution. Japan (Hokkaido), Russia (Siberia, Khabarovsk, Primorye, Magadan, Sakhalin), China (Hei-long-jiang), Mongolia (Arkhangai).
Stactobiella kumejima Ito 2020
Distribution. Japan (Ryukyu Islands: Kume-jima, Okinawa-jima).
Stactobiella tshistjakovi (Arefina and Morse, 2002)
Stactobia tshistjakovi Arefina and Morse 2002, 103-104, figs. 16-18, male, Russian Far East (South Primorye).
Distribution. Japan (Hokkaido, Honshu), Russia (South Primorye, Sakhalin).
Genus Ugandatrichia Mosely
Ugandatrichia nakijinensis Ito 2012
Distribution. Japan (Ryukyu Islands: Okinawa-jima, Amami-Oshima).
Ugandatrichia taiwanensis Hsu and Chen 2002
Distribution. Japan (Ryukyu Islands: Ishigaki-jima, Iriomote-jima), Taiwan.