After Nelson, 1994 and Long, 1995 (originally Arsenault & Janvier, 1991?)

<==o Hyperoartii Müller, 1844 sensu Nelson, 1994 and Long, 1995 (originally Arsenault & Janvier, 1991?) [incl. Anaspida; Hyperoartia] (lampreys; nahkiaiskalat)
   |?- †Haikouichthys ercaicunensis Luo, Hu & Shu, 1999 sensu Shu et al., 1999 
   `--o Anaspida
      |?- †Achanarella trewini Newman, 2002 [Achanarella Rowlands (nomen nudum)] [Achanarellidae Newman, 2002]
      |?- †Jaymoytius kerwoodi [Jaymoytiidae]
      |?- †Endeiolepis aneri [Endeiolepidae] [possibly synonymous or cogeneric with Euphanerops longaevus (Janvier, et al., 2006)]
      |?-o †Euphaneropidae Woodward, 1900 [Euphaneropsidae]
      |  |-- †Cornovichthys blaauweni Newman & Trewin, 2001
      |  `-- †Euphanerops longaevus Woodward, 1900
      `--+--o †Pharyngolepis Kiær, 1911
         |  |-- †P. oblongus
         |  `-- †P. heintzi
         `--+--o †Pterygolepis Cossmann, 1920 [Pterolepidops, Pterolepis]
            |  `-- †P. nitidus
            `--+--o †Ryncholepis Kiær, 1911 [Rhyncholepididae Kiær, 1924]
               |  `-- †R. parvulus [Rhynocholepis parvulus (lapsus calami)]
               `--+--o †Birkeniida Berg, 1937
                  |  |-- †Lasanius problematicus Traquair, 1898 [Lasaniidae]
                  |  |-- †Ramsaasalepis porosa Blom, Märss & Miller, 2003 [Ramsaasalepididae Blom, Märss & Miller, 2003]
                  |  `--o †Birkeniidae
                  |     |?- †Vilkitskilepis valentinae Märss, 2002
                  |     |-- †Birkenia elegans Traquair, 1898
                  |     |-- †Ctenopleuron
                  |     `-- †Saarolepis
                  `--o “Pteromyxontimorpha” [Petromyzontiformes Berg, 1940 sensu lato]
                     |?- †Hardistiella montanensis Janvier & Lund, 1983 [paraphyletic Mayomyzoninae]
                     `--+-- †Mayomyzon pieckoensis Bardack & Zangerl, 1962; U.Carb. NA. [paraphyletic Mayomyzoninae]
                        `--+?- †Pipiscius zangerli Bardack & Richardson, 1977 [paraphyletic Mayomyzoninae]
                           `--+-- †Priscomyzon riniensis Gess, Coates & Rubidge, 2006; U.Dev.SAf.
                              `--+-- †Mesomyzon mengae Chang, Zhang & Miao, 2006; L.Cret. EAs.
                                 `-- Petromyzontidae [Petromyzontiformes Berg, 1940 sensu stricto; Petromyzontida] (modern lampreys; nykynahkiaiset) [N: 3/41] [FB: 8/38]

Untreated Anaspida

SchidiosteusRytidolepisVesikulepisMaurylepisSilmalepisSeptentrionalis Blom, Märss & Miller, 2002
    †Liivilepis curvata Blom, Märss & Miller, 2002
    †HoburgilepisTahulalepis elongituberculata Blom, Märss & Miller, 2002
    †SpokoinolepisManbrookia Blom, Märss & Miller, 2002
    †Ruhnulepis



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