Centroderes Zelinka, 1907 (basis of record)
Centroderidae Zelinka, 1896 (basis of record)
Cephalorhyncha (basis of record)
Cyclorhagida (basis of record)
Echinoderes Claparède, 1863 (basis of record)
Echinoderidae Carus, 1885 (basis of record)
Halicryptus von Siebold, 1849 (basis of record)
Halicryptus spinulosus von Siebold, 1849 (basis of record)
Homalorhagida accepted as Allomalorhagida (basis of record)
Kinorhyncha (basis of record)
Kinorhynchus Sheremetevskij, 1974 (basis of record)
Nectonema Verrill, 1879 (basis of record)
Nectonema agile Verrill, 1879 (basis of record)
Nectonematida (basis of record)
Nectonematidae (basis of record)
Nematomorpha (basis of record)
Priapulida (basis of record)
Priapulidae Gosse, 1855 (basis of record)
Priapulopsis Koren & Danielssen, 1875 (basis of record)
Priapulopsis bicaudatus (Danielssen, 1869) (basis of record)
Priapulus Lamarck, 1816 (basis of record)
Priapulus caudatus Lamarck, 1816 (basis of record)
Pycnophyes Zelinka, 1907 (basis of record)
Pycnophyes borealis Higgins & Korczynski, 1989 accepted as Krakenella borealis (Higgins & Korczynski, 1989) Sánchez, Yamasaki, Pardos, Sørensen & Martínez, 2016 (basis of record)
Pycnophyes canadensis Higgins & Korczynski, 1989 accepted as Krakenella canadensis (Higgins & Korczynski, 1989) Sánchez, Yamasaki, Pardos, Sørensen & Martínez, 2016 (basis of record)
Pycnophyidae Zelinka, 1896 (basis of record)

Arctic Ocean for Halicryptus spinulosus von Siebold, 1849 
Arctic Ocean for Priapulopsis bicaudatus (Danielssen, 1869) 
Arctic Ocean for Priapulus caudatus Lamarck, 1816 
Black Sea for Nectonema agile Verrill, 1879 
European waters (ERMS scope) for Halicryptus spinulosus von Siebold, 1849 
European waters (ERMS scope) for Nectonema agile Verrill, 1879 
European waters (ERMS scope) for Priapulopsis bicaudatus (Danielssen, 1869) 
European waters (ERMS scope) for Priapulus caudatus Lamarck, 1816 
Mediterranean Sea for Nectonema agile Verrill, 1879 

 Distribution

 for Campyloderes adherens Nyholm, 1947

E North Atlantic [details]

 Distribution

 for Centroderes eisigii Zelinka, 1928

Mediterranean [details]

 Distribution

 for Maccabeus tentaculatus Por, 1973

Mediterranean [details]

 Distribution

 for Paracentrophyes quadridentatus (Zelinka, 1928)

Mediterranean, Baltic Sea? [details]

 Habitat

 for Halicryptus spinulosus von Siebold, 1849

coastal to slope, also brackish & hypersaline [details]

 Habitat

 for Priapulopsis bicaudatus (Danielssen, 1869)

shelf to deep sea [details]

 Habitat

 for Priapulus abyssorum Menzies, 1959

abyssal [details]

 Habitat

 for Priapulus caudatus Lamarck, 1816

coastal to deep sea [details]