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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 ]
Size comparison with T. horridus in blue and T. prorsus in red Triceratops was a very large animal, measuring around 8–9 m (26–30 ft) in length and weighing up to 6–10 metric tons (6.6–11.0 short tons).
English: Size comparison of several members of Ceratopsidae. The taxa included are listed here (from left to right): Left side: Nasutoceratops titusi, Styracosaurus albertensis, Centrosaurus apertus, and Pachyrhinosaurus canadensis. Right side: Triceratops prorsus, Pentaceratops sternbergii, Chasmosaurus belli, and Anchiceratops ornatus.
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 ]
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.
Size comparison between the famous ceratopsian Triceratops and a human: Date: 23 September 2007: Source: Based on Image:Triceratops BW.jpg and Image:Human-triceratops size comparison.png: Author: Marmelad: Permission (Reusing this file) Attribution ShareAlike 2.5
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 ...
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 ...