Nipponentominae Yin 1983

Subfamily Nipponentominae Yin, 1983

This subfamily includes 13 genera (Szeptycki 2007; Bu & Yin 2007; Shrubovych et al. 2014), eight of which occur in the northeastern Palearctic.

Verrucoentomon Rusek, 1974 contains 13 species (Shrubovych & Bernard 2012). Nine species are distributed in the eastern Palearctic: Russian Asia, Japan, China and Korea. Only one species, V. rafalskii Szeptycki, 1997, has been reported in Central Europe (Carpathians), and 3 species are known in North America (northern Canada, Alaska) (Fig. 7). Two species, V. aurifer and V. joannis, are distributed in southern Siberia (Szeptycki 1988), and V. anatoli is widespread in northern and eastern Siberia (Shrubovych & Bernard 2012). Three species, V. louisanne, V. kawakatsui and V. shirampa, have been recorded from the Russian Far East (Nakamura 2004; Shrubovych & Bernard 2012).

Callientomon Yin, 1980 possesses only one species, C. chinensis, which is distributed in northern China (Yin 1980, 1999). I have seen two female specimens from the Russian Far East (collected in the Skotovsky and Khasansky areas of Primorskyi Kray).

Nienna Szeptycki, 1988 includes two species, both distributed in the Asian Palearctic. The type species, N. parvula, is recorded from the southern part of Siberia (Szeptycki 1988) and is known only from the type locality. The other species, N. quinghaiensis Bu & Yin, 2008, occurs in Inner Mongolia (Bu & Yin 2008; Bu et al. 2011).

Noldo Szeptycki, 1988 comprises two species. Noldo submontanus Szeptycki, 1988 is found in southern Siberia. Noldo kaprusii Shrubovych & Szeptycki, 2006, is described from the Crimea Mountains in Ukraine (Shrubovych & Szeptycki 2006). Several undescribed species of Noldo occur in the Caucasus Mountains (unpublished).

Yavanna Szeptycki, 1988 contains 7 species, occurring in northeastern Asia and North America (Shrubovych et al. 2012). Five species (Y. altaica, Y. baikalica, Y. chimitovae, Y. stebaevae and Y. babenkoi) are known from Siberia, one species from China and one from Alaska. All the Siberian species are distributed in southern Siberia with the exception of Y. babenkoi, which is found in northern Siberia (Shrubovych et al. 2012).

Nipponentomon Imadaté & Yosii, 1959 contains 16 species: 9 from the eastern Palearctic (Russian Far East, Northeast China, Japan and Korea) and 7 from North America (USA, Canada) (Szeptycki 2007; Bernard & Biechele 2008; Shrubovych 2009a; Bu et al. 2013) (Fig. 9). Five species have been recorded from eastern Russia. The majority (4 species) are distributed in the Russian Far East: N. bidentatum and N. khabarovskense were recorded from Khabarovskyi Kray (Nakamura 2004), while N. nippon and N. jaceki are numerous and widely distributed in the Primorskyi and Ussurijskyi districts (Shrubovych 2009a). These species occur in Khabarovskyi Kray as well (1 female of N. nippon, 1 preimago of N. jaceki, Russia, Khabarovskyi Kray, upper floor of Ko River, soil in mixed wood with cedar, hazel and maple, 02.VIII.2011, coll. N. Rjabinin). Only one Siberian species, N. taiga, has been collected; this species is known from both the northern and the southern parts of Siberia (Bu et al. 2013).

Imadateiella Rusek, 1974 comprises 7 species and one subspecies, all distributed in the eastern Palearctic: Japan, Korea, China, the Russian Far East and Siberia (Szeptycki 1988; Szeptycki 2007) (Fig. 10). Two species have been identified from Russian Asia: I. murka from Eastern Siberia (Szeptycki 1988) and I. sharovi from the Magadan district in the Russian Far East. Some specimens of this genus have been collected from northern Siberia (Fig. 1, Site 1).