Ax, P. (1971). Neue interstitielle Macrostomida (Turbellaria) der Gattungen Acanthomacrostomum und Haplopharynx. <em>Mikrofauna des meeresbodens.</em> 8: 298-308. page(s): 303-307, Figs.. 4-6 [details]
Tyler, S., Artois, T.; Schilling, S.; Hooge, M.; Bush, L.F. (eds) (2006-2018). World List of turbellarian worms: Acoelomorpha, Catenulida, Rhabditophora. Haplopharynx quadristimulus Ax, 1971. Accessed at: http://www.marinespecies.org/turbellarians/aphia.php?p=taxdetails&id=481344 on 2023-09-29
original descriptionAx, P. (1971). Neue interstitielle Macrostomida (Turbellaria) der Gattungen Acanthomacrostomum und Haplopharynx. <em>Mikrofauna des meeresbodens.</em> 8: 298-308. page(s): 303-307, Figs.. 4-6 [details]
Present Inaccurate Introduced: alien Containing type locality