Apopharynx Lühe, 1909 (identification resource)
Apopharynx bolodes (Braun, 1902) Lühe, 1909 (redescription)
Lyperorchis Travassos, 1921 (identification resource)
Lyperorchis lyperorchis Travassos, 1921 (redescription)
Psilochasmus Lühe, 1909 (identification resource)
Psilochasmus agilis Travassos, 1921 accepted as Psilochasmus oxyurus (Creplin, 1825) Lühe, 1909 (redescription)
Psilochasmus longicirratus Skrjabin, 1913 accepted as Psilochasmus oxyurus (Creplin, 1825) Lühe, 1909 (redescription)
Psilochasmus oxyurus (Creplin, 1825) Lühe, 1909 (redescription)
Psilochasmus skrjabini Gnedina, 1946 accepted as Psilochasmus oxyurus (Creplin, 1825) Lühe, 1909 (redescription)
Psilorchis Thapar & Lal, 1935 (identification resource)
Psilorchis ajgainis Lal, 1938 (redescription)
Psilostomidae Looss, 1900 (identification resource)
Psilostomum brevicolle (Creplin, 1829) Braun, 1902 (redescription)
Psilostomum cygnei Southwell & Kirschner, 1937 (redescription)
Psilostomum lineatum Linton, 1928 accepted as Podocotyle reflexa (Creplin, 1825) Odhner, 1905 (redescription)
Psilostomum marilae Price, 1942 accepted as Neopsilotrema marilae (Price, 1942) Kudlai, Pulis, Kostadinova & Tkach, 2016 (redescription)
Psilostomum ondatrae Price, 1931 accepted as Ribeiroia ondatrae (Price, 1931) Price, 1942 (redescription)
Psilostomum plicitum Linton, 1928 accepted as Bianium plicitum (Linton, 1928) Stunkard, 1931 (redescription)
Psilostomum progeneticum Wisniewski, 1933 (redescription)
Psilostomum varium Linton, 1928 accepted as Pseudopsilostoma varium (Linton, 1928) Yamaguti, 1958 (redescription)
Psilotrema marki Skvortsov, 1935 (redescription)
Sphaeridiotrema Odhner, 1913 (identification resource)
Sphaeridiotrema globulus (Rudolphi, 1819) Odhner, 1913 (redescription)

Azerbaijan for Psilochasmus skrjabini Gnedina, 1946 
Brazil for Lyperorchis lyperorchis Travassos, 1921 
Brazilian Exclusive Economic Zone for Psilochasmus agilis Travassos, 1921 
England for Psilostomum cygnei Southwell & Kirschner, 1937 
European waters (ERMS scope) for Psilochasmus oxyurus (Creplin, 1825) Lühe, 1909 
European waters (ERMS scope) for Psilostomum brevicolle (Creplin, 1829) Braun, 1902 
German Exclusive Economic Zone for Sphaeridiotrema globulus (Rudolphi, 1819) Odhner, 1913 
Germany for Apopharynx bolodes (Braun, 1902) Lühe, 1909 
India for Psilorchis ajgainis Lal, 1938 
Kazakhstan for Psilochasmus longicirratus Skrjabin, 1913 
Moscow Oblast for Psilotrema marki Skvortsov, 1935 
North America for Psilostomum ondatrae Price, 1931 
North America for Psilostomum varium Linton, 1928 
Philippines for Psilochasmus longicirratus Skrjabin, 1913 
USA for Psilostomum marilae Price, 1942 
Yugoslavia (ex) for Psilostomum progeneticum Wisniewski, 1933