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Diplodocus, depicted with spines limited to the mid-line of the back. Diplodocids were generally large animals, even by sauropod standards. Thanks to their long necks and tails, diplodocids were among the longest sauropods, with some species such as Supersaurus vivianae and Diplodocus hallorum estimated to have reached lengths of 30 meters (100 ft) or more. [3]
Diplodocus (/ d ɪ ˈ p l ɒ d ə k ə s /, [3] [4] / d aɪ ˈ p l ɒ d ə k ə s /, [4] or / ˌ d ɪ p l oʊ ˈ d oʊ k ə s / [3]) is an extinct genus of diplodocid sauropod dinosaurs known from the Late Jurassic of North America.
The group was not used often, and was synonymized with Diplodocoidea as the groups were often found to have the same content. In 2005, Mike P. Taylor and Darren Naish reviewed diplodocoid phylogeny and taxonomy, and realized that Diplodocimorpha could not be synonymized with Diplodocoidea.
Diplodocid and brachiosaurid members of the group composed the greater portion of neosauropods during the Jurassic, but they began to be replaced by titanosaurs in most regions through the Cretaceous period. [3] By the late Cretaceous, titanosaurs were the dominant group of neosauropods, especially on the southern continents.
The lizards were “commonly found on tree branches, shrublands, crevice‑filled rock piles, or soil walls at forest edges.” These scaly predators feed on insects and spiders.
The new species was identified by its size, head shape, body shape and teeth, the study said. DNA analysis found the new species had at least 0.7% genetic divergence from other frog species.
Mt. Devica crystal snails were found crawling on “wet rocks” in “a small underground cavern,” the study said. The animals were living “deeper in the pit” and “only found in the ...
The first described specimens of Supersaurus were individual bones that suggested a large diplodocid. A large cervical vertebra BYU 9024 from the same quarry was later assigned to Supersaurus. [18]. This vertebra measures 1.38 m (4.5 ft) in length and is the longest cervical known. [19]