After Peters, 1997 [“The Pterosaur Homepage”]

<==o †Euthygnatha Peters, 1997 (“suoraleukaiset”)
   |-- †“Germanodactylus” rhamphastinus
   `--+--+?-o †Ornithodesmidae [incl. Gallodactylidae, Cyclorhamphidae, Caeradactylidae, and Istiodactylidae]
      |  |  |-- †Istiodactylus latidens (Seeley, 1901) Howsw, Milner & Martill, 2001 ["Ornithodesmus" latidens Seeley, 1901] [Ornithodesmidae; Istiodactylidae]
      |  |  |?- †Caeradactylus atrox
      |  |  `--o Cycnorhamphus [Gallodactylus] [Gallodactylidae]
      |  |     |-- †G. suevicus
      |  |     `-- †G. canjuersensis
      |  `--+-- ?†Ornithocheiridae
      |     `--o †Anhangueridae
      |        |?-o †“Coloborhynchus”
      |        |  |-- “C.” clavirostris
      |        |  `-- “C.” wadleighi
      |        |--o †Tropeognathus [Criorhynchus]
      |        |  |-- †T. mesembrinus
      |        |  |-- †T. robustus
      |        |  `-- †T. simus [Criorhynchus simus]
      |        `--+-- †Arthurdactylus conan-doylensis
      |           `--o †Anhanguera
      |              |-- †A. blittersdorffi
      |              `-- †A. santanae
      `--+--o Pterodactylus [Pterodactylidae]
         |  |-- †P. antiquus
         |  |-- †P. kochi
         |  |-- †P. micronyx [Gnathosaurus subulatus??]
         |  |-- †P. elegans
         |  |-- †P. longicollum
         |  |-- †P. grandis
         |  |-- †P. grandipelvis
         |  |-- †P. cerinensis
         |  |-- †P. suprajurensis
         |  |-- †P. manseli
         |  |-- †P. pleydelli
         |  |-- †P. arningi
         |  |-- †P. maximus
         |  `-- †P. sp. [?Germanodactylus cristatus]
         `--+--o †Ctenochasmatidae
            |  |-- †Gnathosaurus subulatus
            |  |--o †Ctenochasma
            |  |  |-- †C. roemeri
            |  |  |-- †C. gracile
            |  |  |-- †C. porocristata
            |  |  `-- †C. elegans
            |  `--o †Pterodaustro
            |     |-- †P. guinazui
            |     `-- †P. sp.
            `--o Tanydiroptera Peters, 1997
               |-- †Huanhepterus quingyangensis
               |-- †Doratorhynchus validus
               |-- †Diopecephalus
               `--o †Azhdarchidae Nesov, 1984 [Titanopterygiidae Padian, 1984]
                  |-- †Titanopteryx philadelphiae
                  |-- †Azhdarcho langicollis Nesov, 1984
                  |-- †Arambourgiania sp.
                  |-- †Zhenjiangopterus sp.
                  `--o †Quetzalcoatlus
                     |-- †Q. northropi [male??]
                     `-- †Q. sp. [female??]

Reference(s):