World Register of Marine Species (WoRMS)
WoRMS (2026). Psilostomum varium Linton, 1928. Accessed at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1443838 on 2026-08-30
Linton, E. (1928). Notes on trematode parasites of birds. Proceedings of the United States National Museum. 73, 1–36.