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Ankylosaurus is considered part of the subfamily Ankylosaurinae (members of which are called ankylosaurines) within Ankylosauridae. [20] Ankylosaurus appears to be most closely related to Anodontosaurus and Euoplocephalus. [21] The following cladogram is based on a 2015 phylogenetic analysis of the Ankylosaurinae conducted by Arbour and Currie ...
Ankylosauridae (/ ˌ æ ŋ k ɪ l oʊ ˈ s ɔː r ɪ d iː /) is a family of armored dinosaurs within Ankylosauria, and is the sister group to Nodosauridae.The oldest known ankylosaurids date to around 122 million years ago and went extinct 66 million years ago during the Cretaceous–Paleogene extinction event. [1]
Among the ankylosaurids, Euoplocephalus was exceeded in size only by Ankylosaurus, and perhaps Tarchia and Cedarpelta. Euoplocephalus was about 5.3 metres (17 ft) long and weighed about 2 metric tons (2.2 short tons). [1] Like other ankylosaurids, it had a very broad and flat low-slung torso, about four feet high, positioned on four short legs.
Smaller nodules and plates filled in the open spaces between large plates. In all three groups, the first two rows of plates tend to form a sort of half-ring around the neck; in nodosaurids, this comes from adjacent plates fusing with each other (and there is a third row as well), while ankylosaurids usually have the plates fused to the top of ...
In 2013, Victoria Megan Arbour and Philip Currie continued to refer AMNH 5337 (and AMNH 5403) to Euoplocephalus, suggesting that differences from other skulls referred to Euoplocephalus could be due to changes occurring with growth and development. [2] They also noted that AMNH 5337 differed from Scolosaurus and Dyoplosaurus in the pelvic region.
Let’s take a look at a range of types of saltwater aquarium fish, both common and rare, affordable and budget-busting. 1. Ocellaris clownfish ... with the differences being thinner black lines ...
As all phylogenies referenced included both Panoplosaurus and Nodosaurus within the same group relative to Ankylosaurus, the addition of another internal specifier was deemed unnecessary. Nodosauridae is traditionally composed of the basal clade Polacanthinae (sometimes recovered outside of the Nodosauridae), as well as the Panoplosaurini and ...
Still, Zangroniz said if a person has pet fish and notices they're floating in the tank or swimming erratically, they can try to remove variables that draw out stress from the fish or seek medical ...