After Parker, 1981, and Martin & Davis, 2001; with species from “WoRMS

<==o Pentastomida Diesing, 1836 [Pentastomata] (tongue worms; punkkimadot)
   |?-o Raillietiellida Almeida & Christoffersen, 1999
   |  `--o Raillietiellidae Sambon, 1922 [Linguatulidae: Raillietiellinae Sambon, 1922]
   |     |-- Yelirella petauri (Spratt, 2003) Spratt, 2010 [Rileyella Spratt, 2003 (preocc.)]
   |     `--o Raillietiella Sambon, 1910 [Mahafaliella Gretillat, Brygoo & Domergue, 1962; Gretillatia Motta, 1965; Travassostulida Motta & Gomes, 1968; Raillietiella (Heymonsia) Hett, 1934 (nomen nudum)]
   |        |-- R. aegypti Ali, Riley & Self, 1982
   |        |-- R. affinis Bovien, 1927
   |        |-- R. agcoi Tubangui & Masiluńgan, 1936
   |        |-- R. ampanihyensis Gretillat, Brygoo & Domergue, 1962
   |        |-- R. amphiboluri Mahon, 1954
   |        |-- R. belohaensis McAllister, Riley, Freed & Freed, 1993
   |        |-- R. bicaudata Heymons & Vitzthum, 1935
   |        |-- R. bifurcaudata Lakshmipyari & Gambhir, 2012
   |        |-- R. boulengeri (Vaney & Sambon, 1910) [Porocephalus boulengeri Vaney & Sambon, 1910]
   |        |-- R. bufonis Ali, Riley & Self, 1982
   |        |-- R. cartagenensis Ali, Riley & Self, 1985
   |        |-- R. chamaeleonis Gretillat & Brygoo, 1959
   |        |-- R. colubrilineati (Leuckart, 1860)
   |        |-- R. congolensis Fain, 1961
   |        |-- R. crotali Ali, Riley & Self, 1984
   |        |-- R. freitasi (Motta & Gomes, 1968)
   |        |-- R. furcocercum (Diesing, 1836) [Raillietiella gomesi Motta, 1963]
   |        |-- R. gehyrae Bovien, 1927
   |        |-- R. gigliolii Hett, 1924
   |        |-- R. gowrii Rajalu & Rajendran, 1970
   |        |-- R. hebitihamata Self & Kuntz, 1960 [Raillietiella frenatus Ali, Riley & Self, 1981]
   |        |-- R. hemidactyli Hett, 1934 [Raillietiella (Heymonsia) hemidactyli Hett, 1934]
   |        |-- R. indica Gedoelst, 1921
   |        |-- R. kochi Heymons, 1926 [Raillietiella shipleyi Heymons, 1926]
   |        |-- R. mabuiae Heymons, 1922
   |        |-- R. maculatus Rao & Hiregaudar, 1962
   |        |-- R. maculilabris Ali, Riley & Self, 1984
   |        |-- R. madagascariensis McAllister, Riley, Freed & Freed, 1993
   |        |-- R. mediterranea (Hett, 1915)
   |        |-- R. monarchus Ali, Riley & Self, 1984
   |        |-- R. morenoi Abreu-Acosta, Foronda Rodriguez, Valladares & Casanova, 2006
   |        |-- R. mottae Almeida, Freire & Lopes, 2008
   |        |-- R. namibiensis Riley & Heideman, 1998
   |        |-- R. orientalis (Hett, 1915)
   |        |-- R. piscator Nair, 1967
   |        |-- R. rileyi Krishnasamy, Jeffery, Inder Singh & Oothuman, 1995
   |        |-- R. schoutedeni Fain, 1960
   |        |-- R. scincoides Ali, Riley & Self, 1984
   |        |-- R. spiralis Hett, 1924
   |        |-- R. teagueselfi Riley, McAllister & Freed, 1988
   |        |-- R. tetrapoda (Gretillat, Brygoo & Domergue, 1962)
   |        |-- R. trachea Riley, Oaks & Gilbert, 2003
   |        |-- R. venteli (Motta, 1965)
   |        `?- R. geckonis (Diesing, 1850)
   |--o Cephalobaenida Heymons, 1935 [Cephalobaeniformis Motta, 1963; incl. Reighardiida Almeida & Christoffersen, 1999]
   |  |?- †Invavita piratica Siveter, Briggs, Siveter & Sutton, 2015; Sil. WEu.
   |  |--o Cephalobaenidae Fain, 1961
   |  |  |-- Cephalobaena tetrapoda Heymons, 1922 [Cephalobaena recurvocauda Motta, 1963]
   |  |  `?- Bothropsiella bicornuta Cavalieri, 1967
   |  `--o Reighardiidae Heymons, 1935 [Reighardiinae Kishida, 1928]
   |     |-- Hispania vulturis Martínez, Criado-Fornelio, Lanzarot, Fernández-García, Rodríguez-Caabeiro & Merino, 2004
   |     `--o Reighardia Ward, 1899
   |        |-- R. lomviae Dyck, 1975
   |        `-- R. sternae (Diesing, 1864)
   `--o Porocephalida Heymons, 1935 [Porocephaliformis Motta, 1963]
      |--o Linguatuloidea Heymons, 1935
      |  `--o Linguatulidae Heymons, 1935 [Linguatulidae Vogt, 1851]
      |     |-- Neolinguatula nuttalli (Sambon, 1922) Haffner & Rack, in Haffner, Rack & Sachs, 1969 [Linguatula nuttalli Sambon, 1922]
      |     `--o Linguatula Frölich, 1789 [Taenia; Tetragulus Bosc, 1811; Prionoderma Cuvier, 1817; Monostoma Numan, 1840]
      |        |-- L. arctica Riley, Haugerud & Nilssen, 1987
      |        |-- L. multiannulata Haffner & Rack, in Haffner, Rack & Sachs, 1969
      |        |-- L. recurvata (Diesing, 1850)
      |        `-- L. serrata Frölich, 1789 [Taenia capraea Abildgaard, 1789; Taenia rhinaris Meyer, 1789; Taenia caprina Gmelin, 1791; Taenia lanceolata Rudolphi, 1805; Linguatula denticulata Rudolphi, 1805; Polystoma taenioides Rudolphi, 1809; Tetragulus caviae Bosc, 1811; Monostoma settenii Numan, 1840; Linguatula dingoensis Johnson, 1910]
      `--o Porocephaloidea Sambon, 1922
         |?-o Subtriquetridae Fain, 1961 [included to Linguatuloidea by “WoRMS”]
         |  `--o Subtriquetra Sambon, 1922
         |     |-- S. megacephalum (Baird, 1853)
         |     |-- S. rileyi Junker, Boomker & Booyse, 1998
         |     |-- S. shipleyi Hett, 1924
         |     `-- S. subtriquetra (Diesing, 1836) [Pentastoma subtriquetrum Diesing, 1836]
         |--o Armilliferidae Fain, 1961 [treated as subfamily of Porocephalidae by “WoRMS”]
         |  |--o Armillifer Sambon, 1922 [Ligamifer Heymons, 1932]
         |  |  |-- A. aborealis Riley & Self, 1981
         |  |  |-- A. agkistrodontis Self & Kuntz, 1966
         |  |  |-- A. armillatus (Wyman, 1845) [Linguatula armillata Wyman, 1845; Linguatula diesingii Van Beneden, 1848]
         |  |  |-- A. australis Heymons, 1935 [Armillifer australis Riley & Self, 1981]
         |  |  |-- A. grandis (Hett, 1915) [Porocephalus grandis Hett, 1915]
         |  |  |-- A. mazzai (Sambon, 1922) [Waddycephalus mazzai Sambon, 1922; Ligamifer mazzai Heymons, 1932]
         |  |  |-- A. moniliformis (Diesing, 1836)
         |  |  `-- A. yoshidai Kishida, 1928
         |  `--o Cubirea Kishida, 1928
         |     |-- C. annulata (Baird, 1853) [Pentastoma annulatum Baird, 1853]
         |     `-- C. pomeroyi (Woodland, 1921) [Porocephalus pomeroyi Woodland, 1921]
         |--o Porocephalidae Sambon, 1922 [non? Heymons, 1935] [Pentastomidae Shipley, 1909]
         |  |--o Elenia Heymons, 1932
         |  |  |-- E. australis Heymons, 1932
         |  |  `?- E. lialisi Heymons, 1939
         |  |-- Gigliolella brumpti (Giglioli, 1922) Chabaud & Choquet, 1954 [Armillifer brumpti Giglioli, 1922]
         |  |--o Kiricephalus Sambon, 1922 [Cayerina Kishida, 1927]
         |  |  |-- K. clelii Riley & Self, 1980
         |  |  |-- K. coarctatus (Diesing, 1850) [Porocephalus seurati Neveu-Lemaire, 1900; Porocephalus herpetodryados Shipley, 1905; Porocephalus globicephalus Hett, 1915]
         |  |  |-- K. constrictor Riley & Self, 1980
         |  |  |-- K. gabonensis Riley & Self, 1980
         |  |  |-- K. pattoni (Stephens, 1908) [Porocephalus pattoni Stephens, 1908; Cayerina mirabilis Kishida, 1927]
         |  |  `-- K. tortus (Shipley, 1898) [Porocephalus tortus Shipley, 1898]
         |  |--o Parasambonia Stunkard & Gandal, 1968
         |  |  |-- P. bridgesi Stunkard & Gandal, 1968
         |  |  `-- P. minor Riley & Self, 1982
         |  |--o Porocephalus Humboldt, 1812 [Polystoma (Pentastoma) Rudolphi, 1812; Pentastoma Rudolphi, 1812; Pentastomum Rudolphi, 1812]
         |  |  |-- P. basiliscus Riley & Self, 1979
         |  |  |-- P. benoiti Fain, 1960
         |  |  |-- P. bifurcatus
         |  |  |-- P. clavatus (Wyman, 1845) [Linguatula clavata Wyman, 1845]
         |  |  |-- P. crotali Humboldt, 1812 [Polystoma quadriuncinata Meyer, 1789; Polystoma humboltii Mayer, 1851; Polystoma proboscideum Rudolphi, 1812]
         |  |  |-- P. dominicana Riley & Walters, 1980
         |  |  |-- P. stilesi Sambon, in Vaney & Sambon, 1910
         |  |  |-- P. subuliferum (Leuckart, 1860) [Porocephalus cercopitheci Breinl & Hindle, 1909; Porocephalus bouvieri Vaney & Sambon, 1910]
         |  |  |-- P. taiwana Qiu, Ma, Fan & Lu, 2005
         |  |  |-- P. tortugensis Riley & Self, 1979
         |  |  `?- P. siamensis Koch, 1906
         |  `--o Waddycephalus Sambon, 1922
         |     |-- W. calligaster Riley & Self, 1981
         |     |-- W. komodoensis Riley & Self, 1981
         |     |-- W. longicauda Riley & Self, 1981
         |     |-- W. porphyriacus Riley & Self, 1981
         |     |-- W. punctulatus Riley & Self, 1981
         |     |-- W. radiata Riley & Self, 1981
         |     |-- W. scutata Riley & Self, 1981
         |     |-- W. superbus Riley & Self, 1981
         |     |-- W. teretiusculus (Baird, 1862) [Pentastoma teretiusculum Baird, 1862]
         |     `-- W. vitiensis Heymons, 1932
         `--o Sebekidae Sambon, 1922 [non? Fain, 1961] sensu “WoRMS”
            |?-o Diesingiidae Heymons, 1935 [non? Fain, 1961] [Diesingiinae Heymons, 1935]
            |  |--o Alofia Giglioli, in Sambon, 1922
            |  |  |-- A. ginae Giglioli, in Sambon, 1922
            |  |  |-- A. indica (von Linstow, 1906) [Porocephalus indicus von Linstow, 1906]
            |  |  |-- A. merki Giglioli, in Sambon, 1922
            |  |  |-- A. nilotici Riley & Huchzermeyer, 1995
            |  |  |-- A. parva Riley & Huchzermeyer, 1995
            |  |  |-- A. platycephalum (Lohrmann, 1889)
            |  |  |-- A. simpsoni Riley, 1994
            |  |  |-- A. travassosi (Heymons, 1932) [Elenia (Waddycephalus) travassosi Heymons, 1932]
            |  |  `?- A. solaris (Tubangui & Masilungan, 1936)
            |  |--o Diesingia Sambon, 1922 [Butantanella Da Fonseca & Ruiz, 1956]
            |  |  |-- D. kachugensis (Shipley, 1910) [Porocephalus kachugensis Shipley, 1910]
            |  |  `-- D. megastomum (Diesing, 1836) [Pentastoma megastomum Diesing, 1836; Butantanella megastomum Da Fonseca & Ruiz, 1956]
            |  `-- Selfia porosus Riley, 1994
            |?-o Sambonidae Fain, 1961
            |  `--o Sambonia Noc & Giglioli, 1922 [Megadrepanoides Self & Kuntz, 1957]
            |     |-- S. clavata (Lohrmann, 1889) [Pentastomum clavatum Lohrmann, 1889; Reighardia lohrmanni Sambon, 1910]
            |     |-- S. parapodum Self && Kuntz, 1966
            |     |-- S. solomenensis (Self && Kuntz, 1957) [Megadrepanoides solomonensis Self & Kuntz, 1957]
            |     |-- S. varani (Self && Kuntz, 1957) [Megadrepanoides varani Self & Kuntz, 1957]
            |     `-- S. wardi (Sambon, in Vaney & Sambon, 1910) [Porocephalus wardi Sambon, in Vaney & Sambon, 1910]
            `--o Sebekidae Sambon, 1922 [Sebekini Sambon, 1922]
               |?- Levisunguis subaequalis Curran, Overstreet, Collins & Benz, 2014
               |--o Leiperiinae Christoffersen & De Assis, 2013
               |  `--o Leiperia Sambon, 1922
               |     |-- L. australiensis Riley & Huchzermeyer, 1996
               |     |-- L. cincinnalis (Sambon, in Vaney & Sambon, 1910) [Reighardia cincinnalis Sambon, in Vaney & Sambon, 1910; Porocephalus nematoides Beauchamp, 1918]
               |     `-- L. gracilis (Diesing, 1836) [Pentastoma gracile Diesing, 1836; Porocephalus crocodili Wheeler, 1915; Leiperia neotropica Heymons & Vitzthum, 1935]
               `--o Sebekinae Sambon, 1922
                  |-- Agema silvaepalustris Riley, Hill & Huchzermeyer, 1997
                  |-- Pelonia africana Junker & Boomker, 2002
                  `--o Sebekia Sambon, 1922 [Bdukus Holl, 1928]
                     |-- S. cesarisi Giglioli, in Sambon, 1922
                     |-- S. divestei Giglioli, in Sambon, 1922
                     |-- S. johnstoni Riley, Spratt & Winch, 1990
                     |-- S. microhamus Self & Rego, 1985
                     |-- S. minor (Wedl, 1861) [Sebekia wedli Giglioli, in Sambon, 1922]
                     |-- S. mississippiensis Overstreet, Self & Vliet, 1985
                     |-- S. multiannulata Riley, Spratt & Winch, 1990
                     |-- S. novaeguineae Riley, Spratt & Winch, 1990
                     |-- S. okavangoensis Riley & Huchzermeyer, 1995
                     |-- S. oxycephalum (Diesing, 1836)
                     |-- S. purdieae Riley, Spratt & Winch, 1990
                     |-- S. trinitatis Riley, Spratt & Winch, 1990
                     |?- S. acuminata Travossos, 1924
                     |?- S. joubini (Vaney & Sambon, 1910) [Porocephalus joubini Vaney & Sambon, 1910]
                     `?- S. samboni Travassos, 1924

Pentastomida incertae sedis:

    Nettorhynchidae Doucet, 1962
        Netorhynchus Zenker, 1827 [Nettorhynchus Zenker, 1827] (a non-pentastomid according to “WoRMS”)

Note:

Pentastomida [Pentastomata] has been demoted from a distinctive class of crustaceans, with unsure relationships, to a subclass of Maxillopoda by Martin & Davis (2001).

Superfamilies Porocephaloidea and Linguatuloidea were not recognized by Martin & Davis (2001).

Reference(s):