| Scientific Name | Author | English Name |
|---|---|---|
| Harrimania kupfferi | (von Willemoes-Suhm, 1871) | |
| Harrimania maculosa | Ritter, 1900 | |
| Harrimania planktophilus | Cameron, 2002 | |
| Mesoglossus bournei | (Menon, 1904) | |
| Mesoglossus intermedius | Deland, Cameron, Rao, Ritter & Bullock, 2010 | |
| Mesoglossus macginitiei | Deland, Cameron, Rao, Ritter & Bullock, 2010 | |
| Protoglossus graveolens | Giray & King, 1996 | |
| Protoglossus koehleri | (Caullery & Mesnil, 1900) | |
| Protoglossus mackiei | Deland, Cameron, Rao, Ritter & Bullock, 2010 | |
| Ritteria ambigua | Deland, Cameron, Rao, Ritter & Bullock, 2010 | |
| Saccoglossus apatensis | Thomas, 1956 | |
| Saccoglossus aulakoeis | Thomas, 1968 | |
| Saccoglossus borealis | Okuda & Yamada, 1955 | |
| Saccoglossus bromophenolosus | King, Giray & Kornfield, 1994 | |
| Saccoglossus caraibicus | (van der Horst, 1924) | |
| Saccoglossus gurneyi | (Robinson, 1927) | |
| Saccoglossus horsti | Brambell & Goodhart, 1941 | |
| Saccoglossus hwangtauensis | Si & Kwang-Chung, 1935 | Huang Island long-snouted worm |
| Saccoglossus inhacensis | van der Horst, 1934 | |
| Saccoglossus kowalevskii | (Agassiz, 1873) | Helical acorn worm |
| Saccoglossus madrasensis | Rao, 1957 | |
| Saccoglossus mereschkowskii | (Wagner, 1885) | |
| Saccoglossus otagoensis | (Benham, 1899) | |
| Saccoglossus porochordus | Cameron, Deland & Bullock, 2012 | |
| Saccoglossus pusillus | (Ritter, 1902) | |
| Saccoglossus pygmaeus | Hinrichs & Jacobi, 1938 | |
| Saccoglossus ruber | Tattersall, 1905 | |
| Saccoglossus sulcatus | (Spengel, 1893) | |
| Stereobalanus canadensis | (Spengel, 1893) | |
| Stereobalanus willeyi | Deland, Cameron, Rao, Ritter & Bullock, 2010 | |
| Xenopleura vivipara | Gilchrist, 1925 |