Riedl, R. J. M. (1970). <i>Semaeognathia</i>, a New Genus of Gnathostomulida from the North American Coast. <em>Internationale Revue der gesamten Hydrobiologie und Hydrographie.</em> 55(3): 359-370., available online athttps://doi.org/10.1002/iroh.19700550306[details]
WoRMS (2025). Semaeognathia Riedl, 1970. Accessed at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=265027 on 2025-05-09
original descriptionRiedl, R. J. M. (1970). <i>Semaeognathia</i>, a New Genus of Gnathostomulida from the North American Coast. <em>Internationale Revue der gesamten Hydrobiologie und Hydrographie.</em> 55(3): 359-370., available online athttps://doi.org/10.1002/iroh.19700550306[details]