- Cerianthus dohrni van Beneden, 1924 accepted as Pachycerianthus dohrni (van Beneden, 1924)
- Cerianthus lloydi Gosse, 1859 accepted as Cerianthus lloydii Gosse, 1859 accepted as Synarachnactis lloydii (Gosse, 1859)
- Cerianthus lloydii Gosse, 1859 accepted as Synarachnactis lloydii (Gosse, 1859)
- Cerianthus membranaceous accepted as Cerianthus membranaceus (Gmelin, 1791)
- Cerianthus membranaceus (Gmelin, 1791)
- Cerianthus vogti Danielssen, 1890
- Pachycerianthus dohrni (van Beneden, 1924)
- Pachycerianthus multiplicatus Carlgren, 1912
- Pachycerianthus solitarius (Rapp, 1829)