Family Odontoceridae Wallengren
Author: Naoki KAWASE
E-mail: kawasen[AT]nifty.com
Last update: 9 February 2026
Subfamily Odontocerinae Wallengren
Two genera, Perissoneura and Psilotreta, were recorded from Japan.
Genus Perissoneura McLachlan
Two species, P. paradoxa and P. similis, were recorded from Japan. However, a taxonomic problem remains in these two species. P. similis was regarded as a junior synonym of P. paradoxa by Ulmer (1907b) and Tsuda (1942b), but reestablished it as a distinct species by Kuwayama (1972). Nozaki et al. (1994) pointed out the necessity to research whether these two species were distinct or conspecific with subspecies or geographical clines.
Perissoneura paradoxa McLachlan 1871
Perissoneura japonica Banks 1906.
Perissoneura chrysea Navás 1922.
Odontocerum kisoensis Iwata 1928.
Heteroplectron yamaguchii Tsuda 1942.
Distribution. Japan (Honshu, Shikoku, Kyushu).
Perissoneura similis Banks 1906
Distribution. Japan (Kyushu).
Genus Psilotreta Banks
Psilotreta atrocaudata Kawase 2022
Distribution. Japan (Amami Island).
Psilotreta bitubercula Kawase 2022
Distribution. Japan (Amami Island).
Psilotreta flavida Kawase 2021
Distribution. Japan (Shikoku).
Psilotreta japonica (Banks 1906)
Odontocerum japonicum Banks 1906
Psilotreta japonica: Ulmer 1907b
Psilotreta kyotoensis Iwata 1928.
Distribution. Japan (Honshu (central to west)).
Psilotreta kisoensis Iwata 1928
Psilotreta armata Martynov 1933.
Distribution. Japan (Honshu, Shikoku).
Psilotreta moritai Kawase 2021
Distribution. Japan (Kii peninsula).
Psilotreta spatulata Kawase 2022
Distribution. Japan (Okinawa Island, Ishigaki Island).
Psilotreta kisoensis non Iwata 1928: Kuwada 1965
Distribution. Japan (Western Honshu, Shikoku, Kyushu, Yaku-shima, Fukue-jima).