The Helochelydridae are an extinct family of turtles known from fossils found in North America and Europe that have been dated from the Late Jurassic to the Late Cretaceous.[1][2] Although referred to as Solemydidae in recent literature on extinct turtles, Helochelydridae has priority over Solemydidae.[3]

Temporal range: Late Jurassic–Late Cretaceous
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Testudinata
Family: Helochelydridae
Nopsca, 1928

Solemydidae Lapparent and Murelaga 1997


Four genera have been included in the family:[1]


  1. ^ a b c "†Helochelydridae Nopsca 1928". Paleobiology Database. Fossilworks. Retrieved 10 July 2017.
  2. ^ Joyce WG; Rabi M; Clark JM; Xu X. (2016). "A toothed turtle from the Late Jurassic of China and the global biogeographic history of turtles". BMC Evolutionary Biology. 16: 236. doi:10.1186/s12862-016-0762-5.
  3. ^ Joyce, Walter G. (2017). "A review of the fossil record of basal Mesozoic turtles" (PDF). Bulletin of the Peabody Museum of Natural History. 58 (1): 65–113. Retrieved July 9, 2017.

Laño (Basque: Lañu) is a hamlet and concejo (a small administrative subdivision) in Condado de Treviño within the Treviño enclave; which is administratively part of the Spanish province of Burgos, but which is completely surrounded by the territory of the Basque country province of Álava. It is best known for the fossils of extinct vertebrates dating from around 70 million years before present which have been found there.


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