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USA Formation: White River Member
Crinoids are commonly known as sea lilies due to their "flower-like" appearance
It had massive ear bones and large eyes
being shed from the jaw during feeding
Fossil canines are extremely difficult to find and rarely appear on the market
Hoplophoneus, saber tooth cat skull Ouranosaurus USA Formation: White River MemberHoplophoneus (pronounced hop loh PHONE ee us) was a relatively small saber toothed cat (about 1 1 2 to 2 times the size of a housecat) that lived during the Oligocene period (from about 40 million to 20 million years ago). Fossils have been found in Wyoming, USA. This cat's skull was 6 inches (15 cm) long. This predator had long, saber like upper canine teeth that fit into a socket in its lower jaw. Hoplophoneus was plantigrade (flat footed, unlike