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Dermochelyidae is a family of sea turtles which has seven extinct genera and one extant genus, containing one living species, the leatherback sea turtle (Dermochelys coriacea). The oldest fossils of the group date to the Late Cretaceous .
Turtles have been classified in different ways by different authors. While they were previously considered anapsids , they are now considered more derived. [ 1 ] Recent analyses of molecular evidence have strongly suggested that they belong in the clade Archosauromorpha (also known as Archelosauria). [ 2 ]
The leatherback sea turtle is the largest sea turtle, reaching 1.4 to more than 1.8 m (4.6 to 5.9 ft) in length and weighing between 300 and 640 kg (661 to 1,411 lbs). [11] Other sea turtle species are smaller, ranging from as little as 60 cm (2 ft) long in the case of the Kemp's ridley, which is the smallest sea turtle species, to 120 cm (3.9 ...
The sea turtle is one of the ocean’s most fascinating, ancient, and distinguished reptiles, renowned for its vital role in the marine ecosystem. ... All About Sea Turtles: A Free Lesson Plan ...
Pandermochelys is a clade of sea turtles belonging to the superfamily Chelonioidea. [1] It is defined as all turtles more closely related to leatherback sea turtles than to cheloniids (green sea turtles and relatives). [2] It includes the largest living turtles, the leatherback sea turtle, as well as the largest sea turtles of all time, Archelon.
For a long time, modern Leatherback sea turtles (Dermochelys) were believed to be descended directly from Psephophorus, [9] specifically the species P. polygonus. [10] However, a 1996 analysis by Wood et al. proved that most of the taxa in the two genera were not connected, meaning Psephophorus could not be a direct ancestor of the modern leatherbacks. [9]
The leatherback sea turtle (Dermochelys coriacea) was once thought to be its closest living relative, but now, Protostegidae is thought to be a completely separate lineage from any living sea turtle. Archelon had a leathery carapace instead of the hard shell seen in most sea turtles. The carapace may have featured a row of small ridges, each ...
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