concretions of calcite-cemented sandstone containing fossils. Following excavation and preparation of the majority of the fossils from the site, its sauropod species was given the name Paluxysaurus jonesi. The name Paluxysaurus was based on the specimen FWMSH 93B-10-18, a partial skull including an associated left maxilla, nasal, and teeth. Other bones from the quarry included a partial neck of seven vertebrae, thirteen vertebrae from the back and 30 from the tail, and examples of all limb and girdle bones except some hand and foot bones. It was distinguished from all other sauropods by vertebral details, and has various morphological differences in other bones compared to other sauropods of the Early Cretaceous of North America. The genus was limited to the bonebed remains; for example, the partial skeleton from Wise County known as Pleurocoelus sp. (SMU 61732) is not referred to Paluxysaurus; instead that specimen is the holotype of Astrophocaudia slaughteri D'Emic 2012, another somphospondylan sauropod. There are differences in the remains of P. sp. and Paluxysaurus, but they cannot be distinguished with confidence. In 2012, re-analysis of these specimens in light of additional Sauroposeidon remains led paleontologists D'Emic and Foreman to conclude that Paluxysaurus was the same animal as Sauroposeidon, and thus a junior synonym of S. proteles. Description The press release in 1999 immediately garnered international media attention, which led to many (inaccurate) news reports of "the largest dinosaur ever!". While Sauroposeidon likely represents the tallest known dinosaur taxon, it does not hold records for either the longest or most massive. Maraapunisaurus or Argentinosaurus make better candidates for the title "World's Largest Dinosaur" , though incomplete fossil evidence (and in the case of Maraapunisaurus, lost) makes exact rankings impossible. The original Sauroposeidon find was composed of four articulated, mid-cervical vertebrae (numbers 5 to 8), with the cervical ribs in place. The vertebrae are extremely elongated, with the largest one having an overall length of , making it the longest sauropod neck vertebra on record. Examination of the bones revealed that they are honeycombed with tiny air cells, and are very thin, like the bones of a chicken or an ostrich, making the neck lighter and easier to lift. The cervical ribs were remarkably long as well, with the longest measurable rib (on vertebra 6) measuring – about 18% longer than the longest rib reported for Giraffatitan, but exceeded in length by the cervical ribs of Mamenchisaurus. Estimates of Sauroposeidon'''s