Genera and species
The World Register of Marine Species lists the following:''Balanoglossus''
Contains the following species: * '' Balanoglossus apertus'' (Spengel, 1893) * '' Balanoglossus aurantiacus'' (Girard, 1853) * '' Balanoglossus australiensis'' (Hill, 1894) * '' Balanoglossus borealis'' (Willey, 1899) * '' Balanoglossus capensis'' (Gilchrist, 1908) * '' Balanoglossus carnosus'' Müller in Spengel, 1893 * '' Balanoglossus clavigerus'' delle Chiaje, 1829 * '' Balanoglossus gigas'' Müller in Spengel, 1893 * '' Balanoglossus hydrocephalus'' van der Horst * '' Balanoglossus misakiensis'' Kuwano, 1902 * '' Balanoglossus natalensis'' (Gilchrist, 1908) * '' Balanoglossus occidentalis'' Ritter, 1902 * '' Balanoglossus proterogonius'' Belichov, 1928 * '' Balanoglossus robinii'' author unknown * '' Balanoglossus salmoneus'' Belichov, 1928 * '' Balanoglossus stephensoni'' van der Horst, 1937 * '' Balanoglossus studiosorum'' van der Horst''Glossobalanus''
Contains the following species: * '' Glossobalanus alatus'' van der Horst * '' Glossobalanus barnharti'' Cameron & Ostiguy, 2013 * '' Glossobalanus berkeleyi'' (Willey, 1931) * '' Glossobalanus crozieri'' van der Horst, 1924 * '' Glossobalanus elongatus'' Spengel, 1904 * '' Glossobalanus hartmanae'' Cameron & Ostiguy, 2013 * '' Glossobalanus hedleyi'' (Hill, 1897) * '' Glossobalanus indicus'' Rao, 1955 * '' Glossobalanus marginatus'' Meek, 1922 * '' Glossobalanus minutus'' Kowalevsky, 1866 * '' Glossobalanus mortenseni'' van der Horst, 1932 * '' Glossobalanus parvulus'' (Punnett, 1906) * '' Glossobalanus ruficollis'' (Willey, 1899) * '' Glossobalanus sarniensis'' (Koehler, 1886) * '' Glossobalanus williami'' Cameron & Ostiguy, 2013''Ptychodera''
Contains the following species: * '' Ptychodera bahamensis'' Spengel, 1893 * '' Ptychodera ceylonica'' author unknown * '' Ptychodera erythrea'' Spengel * '' Ptychodera flava'' Eschscholtz, 1825 * '' Ptychodera pelsarti'' Dakin, 1916References
Enteropneusta {{Hemichordate-stub