Hydroptila spinosa Arefina and Armitage 2003
Type locality. Sakhalin, Russian Far East.
Hydroptila spinosa Arefina and Armitage 2003, 15-16, figs. 1-2, male, female, Russian Far East (Sakhalin).
Ito et al. 2010, 56, Hokkaido (Shiribeshi, Hiyama, Oshima).
Ito et al. 2011, male, female, 12-14, Hokkaido (Kushiro, Tokachi, Soya, Kamikawa, Ishikari, Hidaka, Shiribeshi, Hiyama, Oshima), Honshu (Aomori, Miyagi, Fukushima, Saitama, Tokyo, Kanagawa, Niigata, Nagano, Shizuoka, Mie, Shiga, Wakayama, Tottori), Shikoku (Tokushima, Ehime, Kochi), Kyushu (Nagasaki, Miyazaki).
Moriya and Kubo 2012, 135, Honshu (Kanagawa).
Ito 2013a, 50, 80, Hokkaido (Kushiro, Tokachi).
Ito and Nagayasu 2014, 9, Hokkaido (Sorachi).
Nozaki 2016, 71, 321, 323, adult, Shikoku (Kochi).
Tanida 2016, 71.
Ito 2017a, 3, Honshu (Fukui)
Ito 2017e, 40, Hokkaido (Kamikawa).
Kawase et al. 2017, 26, Honshu (Shiga).
Ito 2018, 502, 505, male.
Morita 2018, 50, Honshu (Mie).
Nozaki 2018, 927, Honshu (Kanagawa).
Morita 2020c, 80, Honshu (Mie).
Shimura and Imasaka 2020, 13, Kyushu (Fukuoka).
Ito 2023b, 3, Honshu (Shizuoka).
Ito and Kuhara 2023, 60-61, Hokkaido (Soya, Kamikawa).
Higuchi 2024, 25, Honshu (Toyama, Ishikawa).
Kawase and Kato 2025, 5, Honshu (Niigata).
Remarks. This species is very similar to H. introspinata Zhou and Sun, and some specimens of H. spinosa recorded in Ito et al. (2011) are incorrect.