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Parasaurolophus (/ ˌ p ær ə s ɔː ˈ r ɒ l ə f ə s,-ˌ s ɔːr ə ˈ l oʊ f ə s /; meaning "beside crested lizard" in reference to Saurolophus) [2] is a genus of hadrosaurid "duck-billed" dinosaur that lived in what is now western North America and possibly Asia during the Late Cretaceous period, about 76.9–73.5 million years ago. [3]
The size of the two Saurolophus species compared to humans. Saurolophus is known from material including nearly complete skeletons, giving researchers a clear picture of its bony anatomy. S. osborni, the rarer Albertan species, was around 8.2–8.5 m (27–28 ft) long, with its skull 1.0 m (3.3 ft) long.
Species Common name Pseudacris cadaverina: California chorus frog Pseudacris hypochondriaca: Southern Pacific chorus frog Pseudacris regilla: Northern Pacific chorus frog Pseudacris sierra: Central Pacific chorus frog
In 1967, pupfish were labeled an endangered species, one of the first in the United States. Before the mid-1990s, scientists counted between 200 and 250 Devils Hole pupfish each spring.
English: Size comparison of the two better-known species of the North American hadrosaurid dinosaur Parasaurolophus, P. walkeri (type species, blue) and P. cyrtocristatus (fuchsia). The ornithopod silhouettes are based on their respective skeletals by Scott Hartman.
Visit the arboretum any day between 8 a.m.–5 p.m. for a look at these trees in the ground and scan the QR code on the sign identifying the tree to make your purchase.
They are considered one of the most invasive species in the marine environment, destroying seagrass, devouring baby crab and salmon and basically laying waste to coastal waters from California to ...
This cladogram is a recent modification of the original 2010 analysis, including more characters and taxa. The resulting cladistic tree of their analysis was resolved using Maximum-Parsimony. 61 hadrosauroid species were included, characterized for 273 morphological features: 189 for cranial features and 84 for postcranial features.