Aplidium constellatum (Verrill, 1871) (basis of record)
Aplidium stellatum (Verrill, 1871) (basis of record)
Ascidia callosa Stimpson, 1852 (additional source)
Ascidia obliqua Alder, 1863 (additional source)
Ascidia prunum Müller, 1776 (additional source)
Boltenia echinata (Linnaeus, 1767) (additional source)
Boltenia ovifera (Linnaeus, 1767) (additional source)
Bostrichobranchus pilularis (Verrill, 1871) (additional source)
Botrylloides aureum Sars, 1851 accepted as Botrylloides aureus Sars, 1851 (additional source)
Botrylloides diegense Ritter & Forsyth, 1917 accepted as Botrylloides diegensis Ritter & Forsyth, 1917 (additional source)
Chelyosoma macleayanum Broderip & Sowerby, 1830 (additional source)
Ciona intestinalis (Linnaeus, 1767) (additional source)
Cnemidocarpa finmarkiensis (Kiaer, 1893) (additional source)
Cnemidocarpa mollis (Stimpson, 1852) (additional source)
Dendrodoa aggregata Müller, 1776 (additional source)
Dendrodoa carnea (Agassiz, 1850) (additional source)
Dendrodoa grossularia (Van Beneden, 1846) (additional source)
Dendrodoa pulchella (Rathke, 1806) (additional source)
Didemnum albidum (Verrill, 1871) (additional source)
Didemnum candidum Savigny, 1816 (additional source)
Distaplia clavata (Sars, 1851) (additional source)
Eugyra glutinans (Moeller, 1842) (additional source)
Eugyra pedunculata Traustedt, 1886 (additional source)
Halocynthia pyriformis (Rathke, 1806) (additional source)
Lissoclinum aureum Verrill, 1871 (additional source)
Molgula arenata Stimpson, 1852 (additional source)
Molgula citrina Alder & Hancock, 1848 (additional source)
Molgula complanata Alder & Hancock, 1870 (additional source)
Molgula griffithsii (MacLeay, 1825) (basis of record)
Molgula provisionalis Van Name, 1945 (original description)
Molgula retortiformis Verrill, 1871 (additional source)
Molgula siphonalis Kiaer, 1896 (additional source)
Pelonaia corrugata Goodsir & Forbes, 1841 (additional source)
Polycarpa fibrosa (Stimpson, 1852) (additional source)
Rhizomolgula globularis (Pallas, 1776) (additional source)
Styela coriacea (Alder & Hancock, 1848) (additional source)
Styela rustica Linnaeus, 1767 (additional source)
Synoicum pulmonaria (Ellis & Solander, 1786) (additional source)
Trididemnum tenerum (Verrill, 1871) (additional source)

United States part of the Gulf of Mexico for Botryllus schlosseri (Pallas, 1766)  (origin: alien)
United States part of the North Atlantic Ocean for Bostrichobranchus pilularis (Verrill, 1871)  (origin: alien)