Apply Online for the 2014 High Use Season Multi-Day River Permit Lottery
Starting December 1, 2013 through January 31, 2014 , boaters can apply for the lottery for the 2014 high use season multi-day river permits through Recreation.gov. More »
Ely Creek Backcountry Campsites Closed
The Ely Creek backcountry campsites located along the Jones Hole Trail have been closed until further notice due to bear activity in the area. More »
About Glirodon grandis:
Glirodon is a rat-sized Jurassic mammal. It has enlarged upper incisors and the name appropriately means “grand rodent tooth.” It filled the niche that rodents fill today. However, Glirodon is not a rodent.
Why is Glirodon grandis a superstar?
Most Jurassic mammal fossils found are isolated teeth or jaw fragments with teeth. The holotype (the first specimen of the species to be discovered and described) of Glirodon is the front half of a skull found at Dinosaur National Monument. Nevertheless the Glirodon from Dinosaur is the most complete multituberculate skull (a group of extinct rodent-like mammal) from Jurassic North America.
Jurassic Fact:It was one of the earliest mammals to have large incisors similar to those in modern mice and rats. However, they are not closely related.
For more information:Visit the Quarry Exhibit Hall where a cast is on display.
Did You Know?
Mormon crickets are wingless grasshoppers that swarm across roads through the summer in the western United States. These flightless insects can form such large swarms that the road appears to move and change colors where they cross.