After Parker, 1980, and Neuhaus, 2015 (WoRMS – World Register of Marine Species)

<==o Kinorhyncha Reinhard, 1881 (mud dragons; okakaulamadot)
   |--o Cyclorhagida
   |  |?-o Antygomonas Nebelsick, 1990 [Antigomonas Nebelsick, 1990 unjust. emend.??][Antygomonidae Adrianov & Malakhov, 1994]
   |  |  |-- A. incomitata Nebelsick, 1990 [Antigomonas incomitata Nebelsick, 1990]
   |  |  |-- A. oreas Bauer-Nebelsick, 1996
   |  |  `-- A. paulae Sørensen, 2007
   |  |?-o Dracoderes Higgins & Shirayama, 1990 [Dracoderidae Higgins & Shirayama, 1990]
   |  |  |-- D. abei Higgins & Shirayama, 1990
   |  |  |-- D. gallaicus Sørensen, Herranz, Rho, Min, Yamasaki, Sánchez & Pardos, 2012
   |  |  `-- D. orientalis Adrianov, in Adrianov & Malakhov, 1999
   |  |?-o Zelinkaderidae Higgins, 1990
   |  |  |-- Triodontoderes anulap Sørensen & Rho, 2009
   |  |  `--o Zelinkaderes Higgins, 1990
   |  |     |-- Z. brightae Sørensen, Heiner, Ziemer & Neuhaus, 2007
   |  |     |-- Z. floridensis Higgins, 1990
   |  |     |-- Z. klepali Bauer-Nebelsick, 1995
   |  |     `-- Z. submersus (Gerlach, 1969)
   |  |--o Cyclorhagae
   |  |  |--o Echinoderidae Zelinka, 1894
   |  |  |  |--o Cephalorhyncha Adrianov, in Adrianov & Malakhov, 1999
   |  |  |  |  |-- C. asiatica (Adrianov, 1989) [Echinoderes asiaticus Adrianov, 1989]
   |  |  |  |  |-- C. liticola Sørensen, 2008
   |  |  |  |  `-- C. nybakkeni (Higgins, 1986) [Echinoderes nybakkeni Higgins, 1986]
   |  |  |  |-- Echinoderes Clarapède, 1863 [Centropsis; Echinoderella; Habroderella; Habroderes; Hapaloderes]
   |  |  |  |--o Fissuroderes Neuhaus & Blasche, 2006
   |  |  |  |  |-- F. higginsi Neuhaus, in Neuhaus & Blasche, 2006
   |  |  |  |  |-- F. novaezealandia Neuhaus, in Neuhaus & Blasche, 2006
   |  |  |  |  |-- F. papai Neuhaus, in Neuhaus & Blasche, 2006
   |  |  |  |  |-- F. rangi Neuhaus, in Neuhaus & Blasche, 2006
   |  |  |  |  `-- F. thermoi Neuhaus & Blasche, 2006
   |  |  |  |--o Meristoderes Herranz, Thormar, Benito, Sánchez & Sørensen, 2012
   |  |  |  |  |-- M. elleae Sørensen, Rho, Min, Kim & Chang, 2012
   |  |  |  |  |-- M. galatheae Herranz, Thormar, Benito, Sánchez & Pardos, 2012
   |  |  |  |  |-- M. glaber Sørensen, Rho, Min, Kim & Chang, 2012
   |  |  |  |  |-- M. herranzae Sørensen, Rho, Min, Kim & Chang, 2012
   |  |  |  |  |-- M. imugi Sørensen, Rho, Min, Kim & Chang, 2012
   |  |  |  |  `-- M. macracanthus Herranz, Thormar, Benito, Sánchez & Pardos, 2012
   |  |  |  `-- Polacanthoderes martinezi Sørensen, 2008
   |  |  `--o Centroderidae Zelinka, 1896
   |  |     |--o Campyloderes Zelinka, 1907
   |  |     |  |-- C. macquariae Johnston, 1938
   |  |     |  `--o C. vanhoeffeni Zelinka, 1913
   |  |     |     `-- C. vanhoeffeni var. kerguelensis Zelinka, 1913 [Campyloderes kerguelensis (Zelinka, 1913) Johnston, 1938]
   |  |     |--o Centroderes Zelinka, 1907 [incl. Zelinkiana Sheremetevskij, 1974; Reinhardella Sheremetevskij, 1974]
   |  |     |  |-- C. eisigii Zelinka, 1928
   |  |     |  `-- C. spinosus (Reinhard, 1881) [Echinoderes spinosus Reinhard, 1881; Campyloderes adherens Nyholm, 1947; Centroderes agigensis Bacescu, 1963; Reinhardella euxinica Sheremetevskij, 1974; Reinhardella spinosa Sheremetevskij, 1974; Zelinkiana adunca Sheremetevskij, 1974; Zelinkiana agigensis Sheremetevskij, 1974; Zelinkiana euxinica Sheremetevskij, 1974; Zelinkiana pseudospinosa Sheremetevskij, 1974; Zelinkiana spinosa Sheremetevskij, 1974]
   |  |     `--o Condyloderes Higgins, 1969
   |  |        |-- C. megastigma Sørensen, Rho & Kim, 2010
   |  |        |-- C. multispinosus (McIntyre, 1962) [Centroderes multispinosus McIntyre, 1962]
   |  |        |-- C. paradoxus Higgins, 1969
   |  |        |-- C. setoensis Adrianov, Murakami & Shirayama, 2002
   |  |        `-- C. storchi Higgins, in Martorelli & Higgins, 2004
   |  |--o Conchorhagae
   |  |  `--o Semnoderidae Remane, 1929
   |  |     |--o Semnoderes Zelinka, 1907
   |  |     |  |?- ?S. armatus (Zelinka, 1928) [Echinoderes armatus (Zelinka, 1928)] (nomen dubium)
   |  |     |  |-- S. armiger Zelinka, 1928
   |  |     |  |-- S. pacificus Higgins, 1967
   |  |     |  `-- S. ponticus Bacescu & Bacescu, 1956
   |  |     `--o Sphenoderes Higgins, 1969
   |  |        |-- S. indicus Higgins, 1969
   |  |        `-- S. poseidon Sørensen, Rho & Kim, 2010
   |  `--o Cryptorhagae
   |     `--o Cateriidae Gerlach, 1956
   |        `--o Cateria Gerlach, 1956
   |           |-- C. gerlachi Higgins, 1968
   |           `-- C. styx Gerlach, 1956
   `--o Homalorhagida
      `--o Homalorhagae
         |--o Pycnophyidae Zelinka, 1896
         |  |-- Kinorhynchus Sheremetevskij, 1974 [Leptodemus; Trachydemus Zelinka, 1907]
         |  `-- Pycnophyes Zelinka, 1907 [Centrophyes; Hyalophyes]
         `--o Neocentrophyidae Higgins, 1969
            |--o Neocentrophyes Higgins, 1969
            |  |-- N. intermedius Higgins, 1969
            |  `-- N. satyai Higgins, 1969
            `--o Paracentrophyes Higgins, 1983
                |-- P. anurus Sørensen, Pardos, Herranz & Rho, 2010
                |-- P. praedictus Higgins, 1983
                `-- P. quadridentatus (Zelinka, 1928) [Paracentrophyes flagellatus (Zelinka, 1928) ]

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