On the genus Arrup Chamberlin, 1912 (Chilopoda: Geophilomorpha: Mecistocephalidae) from Russia, with a key to the members of the family Mecistocephalidae from Russia

The members of the genus Arrup Chamberlin, 1912 from Russia are reviewed: A. mamaevi (Titova, 1975) is re-described based on type and new material; A. cf. dentatus (Takakuwa, 1934) is also described based on the material from Russia, differences from specimens from Japan are shown. All the records are mapped. A key to the members of the family Mecistocephalidae known from Russia is provided.