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The first is a tail vertebra with an exostosis ankylosing the chevron of one vertebra to the centrum of the next. The second is a phalanx, probably belonging to the animal's foot, that shows three low, irregular exostoses. Lastly, a phalanx that probably belong to the animal's hand exhibits a short round callus.
3. The Phalanges of the Foot The phalanx ends in a crescent-shaped rough cap of bone epiphysis — the apical tuft (or ungual tuberosity/process) which covers a larger portion of the phalanx on the volar side than on the dorsal side. Two lateral ungual spines project proximally from the apical tuft.
Sumerian phalanx-like formation c. 2400 BC, from detail of the victory stele of King Eannatum of Lagash over Umma, called the Stele of the Vultures. The phalanx (pl.: phalanxes or phalanges) [1] was a rectangular mass military formation, usually composed entirely of heavy infantry armed with spears, pikes, sarissas, or similar polearms tightly packed together.
Su et al. (2025) describe two new specimens of Glyphoderma kangi, providing new information on the anatomy of the studied placodont. [4]Marx et al. (2025) report evidence of preservation of skin traces, including smooth skin on the tail and scaly skin on the flippers, as well as evidence of preservation of melanosomes and keratinocytes in a plesiosaur specimen from the Lower Jurassic Posidonia ...
There are two principal types of bones: Dermal bone is directly formed in the dermis (skin), usually growing from initially thin plates. Among others, most bones forming the outer surface of the skull and lower jaws are dermal bones. In contrast, endochondral bone is formed from a cartilaginous precursor, which ossifies (turn into bone). [1 ...
The two also battled over who the true leader of DOGE was, The Washington Post reported, given Musk’s large presence. Sources told the outlet the partnership was probably doomed from the start.
As in other dromaeosaurids, the tail vertebrae have a series of ossified tendons and super-elongated bone processes. These features seemed to make the tail into a stiff counterbalance, but a fossil of the very closely related Velociraptor mongoliensis ( IGM 100/986) has an articulated tail skeleton that is curved laterally in a long S-shape.
Echoing France's Napoleon Bonaparte, U.S. President Donald Trump on Saturday took to social media to signal continued resistance to limits on his executive authority in the face of multiple legal ...