original description(ofProsthogonimus (Politogenotrema) gracilis Skrjabin, 1941)Skrjabin, K. I. (1941). Analysis of the phylogenetic evolution of trematodes of the genus Prosthogonimus Lühe. <em>Dokl. Akad. Nauk. SSSR.</em> 3 (7-8): 468–472.(In Russian). page(s): 468 [details]