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Size estimates for the largest Pachyrhinosaurus species, P. canadensis indicate lengths of 6–8 metres (19.7–26.2 ft) and a weight of 3–4 tonnes (3.3–4.4 tons). [ 10 ] [ 11 ] [ 12 ] The other species, P. lakustai and P. perotorum , have been estimated by Greg Paul at 5 metres (16.4 ft) in length and 2 tonnes (2.2 tons) in weight. [ 11 ]
Like all chasmosaurines, Triceratops had a large skull relative to its body size, among the largest of all land animals. The largest-known skull, specimen MWC 7584 (formerly BYU 12183), is estimated to have been 2.5 meters (8.2 ft) in length when complete [ 28 ] and could reach almost a third of the length of the entire animal.
Sexual dimorphism in dinosaurs refers to the different physical characteristics of male and female dinosaurs of the same species. This means that the male and female dinosaurs of a species may differ in size, color, shape, or they may even look like a completely different species altogether, such as in the case of the anglerfish.
The clade Ceratopsidae was in 1998 defined by Paul Sereno as the group including the last common ancestor of Pachyrhinosaurus and Triceratops; and all its descendants. [17] In 2004, it was by Peter Dodson defined to include Triceratops, Centrosaurus, and all descendants of their most recent common ancestor. [18]
Size is an important aspect of dinosaur paleontology, of interest to both the general public and professional scientists. Dinosaurs show some of the most extreme variations in size of any land animal group, ranging from tiny hummingbirds , which can weigh as little as two grams, to the extinct titanosaurs , such as Argentinosaurus and ...
Some researchers consider it an ontogenic stage of Triceratops. †Triceratops †Triceratops horridus †Triceratops prorsus; 68–66 Ma Hell Creek Formation, Montana, USA Lance Formation, Wyoming, USA Possibly the most iconic ceratopsian, Triceratops May have grown up to 6.5 to 12 tonnes and measured 7.5 to 9 meters long. †Zhuchengceratops
With a length of 4.3–4.8 metres (14.1–15.7 ft) and a weight of 1.5–2 tonnes (1.7–2.2 short tons)—or anywhere from 2,200 to nearly 5,000 lbs., give or take—Chasmosaurus was of a slightly smaller to ‘average’ size, especially when compared to larger ceratopsians (such as Triceratops, which were about the size of an African bush ...
Size compared to a human Individuals of the genus Styracosaurus were approximately 5–5.5 metres (16–18 ft) long as adults and weighed about 1.8–2.7 metric tons (2.0–3.0 short tons). [ 17 ] [ 18 ] The skull was massive, with a large nostril , a tall straight nose horn, and a parietal squamosal frill (a neck frill ) crowned with at least ...