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The scute effectively forms the skin over the underlying bony structures; there is a very thin layer of subcutaneous tissue between the scute and the skeleton. The scutes can be brightly colored in some species, and turtle shells often follow Thayer's law with carapace usually being a darker patterning than the plastron, [ 25 ] though there are ...
The term "gastralia" was proposed by Georg Baur in 1898. [6] They had previously been termed "abdominal ribs", [7] but because the term "abdominal ribs" has been applied to various structures, and the gastralia are not true ribs, this is not considered an appopriate term.
It is the most complete Upper Paleolithic skeleton in Northern Europe. When Magdalenian Girl was acquired in 1926 for the Field Museum in Chicago, Illinois by Henry Field, then curator of Physical Anthropology, it was hailed as one of the most significant acquisitions the museum ever made. On the first day the precious specimen was exhibited ...
The common name of gaikotsu-panda-hoya (ガイコツパンダホヤ, translated as "skeleton panda sea squirt" or "skeleton panda ascidian") was given to the animal by Japanese internet users after the first pictures were shared online.
Stromatoporoids are robust sponges with a dense calcite skeleton lacking spicules. Like other sponges, they grow outwards and upwards from a single base attached firmly to the substrate. Most were ambitopic (occupying soft substrate such as mud or sand for most of their life), though some were encrusting (concreted onto hard substrates such as ...
The bones of the postcranial skeleton are thick, having undergone pachyostosis. Mesosaurus is unusual among reptiles in that it possesses a cleithrum, usually found in more primitive bony fish and tetrapods. [13] The head of the interclavicle of Mesosaurus is triangular, unlike those of other early reptiles, which are diamond-shaped. [14]
CT images of skull UALVP 2 in multiple views, showing relative surface densities of bone (blue: low, yellow: high) The skull of Stegoceras was roughly triangular in shape when viewed from the side, with a relatively short snout. The frontal and parietal bones were very thick and formed an elevated dome.
Chelids also lack mesoplastra, which separates them from the Pelomedusidae. The cervical scute is usually present, though it is absent in some species of Elseya and Myuchelys. Otherwise, the carapace has the usual complement of four costals, five vertebrals and twelve marginals (per side).