original description
Ferguson, F. F. (1954). Monograph of the Macrostomine Worms of Turbellaria. <em>Transactions of the American Microscopical Society.</em> 73(2): 137-164., available online at https://doi.org/10.2307/3223751
page(s): 144, 146-147, 149, 156 [details] Available for editors
From editor or global species database
Validity Ferguson, probably unintentionally, consistently misspells Promacrostomum paradoxum An-der-Lan 1939 as Promacrostomum paradoxicum.
[details]