Genus Intramolgus Marchenkov & Boxshall, 1995
Type species. fntramolgus arctẚcus Marchenkov & Boxshall, 1995 by original designation.
Remarks. The genus fntramolgus, the sole genus of the Intramolgidae, has been represented only by the type species fK arctẚcus which was found living in association with three ascidian species of the genus Molgula in the White Sea (Marchenkov & Boxshall, 1995). Here, we describe two additional species.