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Trionyx

Trionyx is a genus of softshell turtles belonging to the family Trionychidae. In the past many species in the family were classified in this genus, but today T. triunguis, the African or Nile softshell turtle, is the only extant softshell still classified as Trionyx. The other species still assigned to this genus are only known from fossils. T. triunguis is a relatively large, aquatic piscivore.

Species

The list of species follows a 2017 review of the Trionychidae by Georgios L. Georgalis and Walter G. Joyce.

The following species are considered valid trionychid taxa, but with uncertain phylogenetic relationships. They are only referred to Trionyx provisionally due to its historic status as a wastebasket taxon. The species from North America follow a 2015 review by Natasha S. Vitek and Walter G. Joyce and the species from Europe and Asia follow the 2017 review by Georgalis and Joyce.

  • † "Trionyx" admirabilis <small>(Hay, 1905)</small> – Paleocene of New Mexico (United States)
  • † "Trionyx" aequa <small>(Hay, 1908)</small> – Eocene of Wyoming (United States)
  • † "Trionyx" allani <small>(Gilmore, 1923)</small> – Late Cretaceous of Alberta (Canada)
  • † "Trionyx" austerus <small>(Hay, 1908)</small> – Late Cretaceous of New Mexico (United States)
  • † "Trionyx" baynshirensis <small>Danilov et al., 2014</small> – Middle Cretaceous of Dornogovi Aimag (Mongolia)
  • † "Trionyx" beecheri <small>(Hay, 1904)</small> – Late Cretaceous of Wyoming (United States)
  • † "Trionyx" boulengeri <small>Reinach, 1900</small> – Oligocene of Rhineland-Palatinate (Germany)
  • † "Trionyx" capellinii <small>Negri, 1892</small> – Eocene of Veneto (Italy)
  • † "Trionyx" dissolutus <small>Vitek & Danilov, 2014</small> – Late Cretaceous of Navoiy Region (Uzbekistan)
  • † "Trionyx" ellipticus <small>(Hay, 1908)</small> – Eocene of Utah (United States)
  • † "Trionyx" eloisae <small>(Gilmore, 1919)</small> – Paleocene of New Mexico (United States)
  • † "Trionyx" foveatus <small>Leidy, 1857</small> – Late Cretaceous of Montana (United States)
  • † "Trionyx" gilbentuensis <small>Danilov et al., 2014</small> – Late Cretaceous of Ömnögovi Aimag (Mongolia)
  • † "Trionyx" gobiensis <small>Danilov et al., 2014</small> – Late Cretaceous of Ömnögovi Aimag (Mongolia)
  • † "Trionyx" gregarius <small>(Gilmore, 1934)</small> – Eocene of Inner Mongolia (China)
  • † "Trionyx" henrici <small>Owen, 1849</small> – Eocene of Hampshire (United Kingdom)
  • † "Trionyx" ikoviensis <small>Danilov et al., 2011</small> – Eocene of Luhansk (Ukraine)
  • † "Trionyx" impressus <small>(Yeh, 1963)</small> – Eocene of Yuangdong Province (China)
  • † "Trionyx" latus <small>(Gilmore, 1919)</small> – Late Cretaceous of Alberta (Canada)
  • † "Trionyx" leucopotamicus <small>Cope, 1891</small> – Eocene of Saskatchewan (Canada)
  • † "Trionyx" johnsoni <small>Gilmore, 1931</small> – Eocene of Inner Mongolia (China)
  • † "Trionyx" kansaiensis <small>Vitek & Danilov, 2010</small> – Late Cretaceous of Khodzhent Province (Tajikistan)
  • † "Trionyx" linchuensis <small>(Yeh, 1962)</small> – Eocene of Shandong Province (China)
  • † "Trionyx" messelianus <small>Reinach, 1900</small> – Eocene of Hesse (Germany)
  • † "Trionyx" miensis <small>Okazaki and Yoshida, 1977</small> – Pliocene of Mie Prefecture (Japan)
  • † "Trionyx" miocaenus <small>(Matthew, 1924)</small> – Eocene of Wyoming (United States)
  • † "Trionyx" minusculus <small>(Chkhikvadze, 1973)</small> – Eocene of East Kazakhstan Region (Kazakhstan)
  • † "Trionyx" mira <small>(Hay, 1908)</small> – Eocene of Wyoming (United States)
  • † "Trionyx" ninae <small>Chkhikvadze, 1971</small> – Oligocene of Karagandy Region (Kazakhstan)
  • † "Trionyx" onomatoplokos <small>Georgalis & Joyce, 2017</small> – Late Cretaceous of Kyzylorda Region (Kazakhstan)
  • † "Trionyx" reesidei <small>(Gilmore, 1919)</small> – Paleocene of New Mexico (United States)
  • † "Trionyx" riabinini <small>Kuznetsov & Chkhikvadze, 1987</small> – Late Cretaceous of Kyzylorda Region (Kazakhstan)
  • † "Trionyx" robustus <small>(Gilmore, 1919)</small> – Late Cretaceous of New Mexico (United States)
  • † "Trionyx" shiluutulensis <small>Danilov et al., 2014</small> – Late Cretaceous of Ömnögovi Aimag (Mongolia)
  • † "Trionyx" silvestris <small>Walker & Moody, 1974</small> – Eocene of Kent (United Kingdom)
  • † "Trionyx" singularis <small>(Hay, 1907)</small> – Paleocene of New Mexico (United States)
  • † "Trionyx" uintaensis <small>Leidy, 1873</small> – Eocene of Wyoming (United States)
  • † "Trionyx" vegetus <small>(Gilmore, 1919)</small> – Paleocene of New Mexico (United States)
  • † "Trionyx" yixiensis <small>Li, Tong et al., 2015</small> – Early Cretaceous of Heilongjiang Province (China)

† = extinct

References

External links