Paradoxosomatidae Daday, 1889

Mikhaljova, Elena V. & Sergeev, Maksim E., 2021, Review of the millipedes of the Sikhote-Alin State Nature Biosphere Reserve (Far East of Russia), with detection of the morphological variability of Diplomaragna terricolor (Attems, 1899) (Diplopoda), Amurian Zoological Journal XIII (2), pp. 167-182 : 177

Family Paradoxosomatidae Daday, 1889 Genus Sichotanus Attems, 1914

Sichotanus eurygaster (Attems, 1898) Sichotanus eurygaster — Gromyko 1990: 66; Mikhaljova 1993: 30; Ganin 1997: 124; 2011: 341.

Material. Russia: 1♀ ( FSCB), Primorsky Krai, Sikhote-Alin State Nature Biosphere Reserve: Yasnaya, floodplain of Zabolochennaya River , 2.07.2015 ; 12♂ ( FSCB), Yasnaya, floodplain of Zabolochennaya River , forest, pitfall traps, 44 ° 53ʹ25′′N, 136 ° 20ʹ18′′E, 3– 5.07.2015 ; 1♂ ( FSCB), Beloborodovsky, Yasnaya River (upper reaches), 45 ° 29ʹ39′′N, 136 ° 38ʹ29′′E, 18– 20.05.2016 ; 1♀ ( FSCB), Sporny Stream (upper reaches), 29.06.2017 ; 1juv. ( FSCB), Sporny, Serebryanka River (upper reaches), environs of Bromleevskaya Izba , 45 ° 19ʹ40′′N, 135 ° 99ʹ01′′E, 31.07.– 2.08.2020 ; 1♂ ( FSCB), Sakhlinsky, Sakhalinsky Stream (upper reaches), 45 ° 41ʹ47”N, 136 ° 37ʹ13”E, 30.05.2020 ; 2♂, 1♀ ( FSCB), Kuruma , floodplain of Kuruma River , 44 ° 91ʹ52′′N, 136 ° 21ʹ18′′E, 6– 9.06.2020 ; 1♂ ( FSCB), Abrek, floodplain of Skrytaya River , 45 ° 09ʹ82′′N, 136 ° 69ʹ08′′E, 3– 5.07.2020 ; 1♀ ( FSCB), Blagodatnoe, Sukhoy Stream (upper reaches), 600–700 m a.s.l., 44 ° 58ʹ57′′N, 136 ° 31ʹ09′′E, 9– 10.07.2020 ; all leg. M. E. Sergeev.

Distribution. Russia: Far East (Primorsky Krai, southern part of Khabarovsky Krai, Jewish Autonomous Oblast); North and South Korea; Northeast China.

Occurrences in the natural landmarks of the Sikhote-Alin State Nature Biosphere Reserve: Abrek, Beloborodovsky, Blagodatnoe, Kuruma, Sakhalinsky, Solontsovy, Sporny, Yasnaya.