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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.
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.
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.
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
"Complete List of Amphibian, Reptile, Bird and Mammal Species in California" (PDF). Archived from the original (PDF) on 2010-11-06 This is the primary source for most species on this list. California Department of Fish and Game. "Mammal Species of Special Concern"
But between logging and fires, 95% of California's redwoods have been destroyed. Over the past decade, the Yurok have been helping restore the land. Another forgotten jewel of the ecosystem is salmon.
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