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Stylemys (meaning "pillar turtle") is the first fossil genus of dry land tortoise belonging to the order Testudines discovered in the United States. The genus lived in temperate to subtropical areas of North America, Europe, and Asia, based on fossil distribution. [1] The genus was first described in 1851 by Joseph Leidy. [2]
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There are fourteen extant families of the order Testudines, an order of reptile. The testudines are some of the most ancient reptiles alive, with only the tuataras considered more primitive. There are approximately 300 extant species and 97 genera of testudines, split into two suborders: the Cryptodirans and the Pleurodirans. The distinction ...
Testudinoidea is a superfamily within the suborder Cryptodira of the order Testudines. It includes the pond turtles (Family: Emydidae), Asian turtles (Family: Geoemydidae), the monotypic big-headed turtle (Family: Platysternidae), and the tortoises (Family: Testudinidae).
Squamata is the largest order of reptiles, comprising lizards, snakes and amphisbaenians (worm lizards), which are collectively known as squamates or scaled reptiles. With over 10,000 species, [15] Approximate world distribution of snakes. Suborder Anguimorpha. Family Anguidae [16]
Chelonipus is a trace fossil ichnogenus attributed to turtles and testudines. [1] Chelonipus ichnospecies are known from the a number of locations including the Early Triassic of Wyoming and Utah, [1] Late Jurassic Morrison Formation [citation needed], the Late Paleocene-Early Eocene Chuckanut Formation, and the Eocene of Texas.
Meanwhile, pleurodires became the dominant freshwater testudines in the Cretaceous to Eocene of Europe, [7] and produced a family of marine species, the Bothremydidae. The Cryptodira suborder has four living superfamilies , the Chelonioidea (sea turtles), Testudinoidea (tortoises and pond turtles), Kinosternoidea (Central American river turtle ...
Beginning in 2012, the Brazilian government has unsuccessfully attempted to repatriate the fossil, [3] but as of 2023 it remains at Waseda University. [ 4 ] After being part of the University of Zurich Department of Palaeontology for over 30 years and labeled simply as "Testudines indet.", the second fossil was described in 2023.