Boltenia is a genus of ascidian tunicates in the family Pyuridae. Species within the genus Boltenia include: * Millar, 1962 * Boltenia echinata (Linnaeus, 1767) * Monniot & Monniot, 1977 * (Oka, 1934) * Boltenia ovifera (Linnaeus, 1767) * (Millar, 1955) * Lambert, 1993 * (Sluiter, 1904) * Boltenia villosa (Stimpson, 1864) * Shenkar & Lambert, 2010 Species names currently considered to be synonyms: