Browse billsOfficial source 
HR 9191
To amend chapter 3 of title 36, United States Code, to designate the American mastodon as the national fossil mammal and the Tyrannosaurus rex as the national fossil dinosaur of the United States, and for other purposes.
Introduced
Jurisdiction
US Congress
Session
119th Congress (2025-2026)
Last updated at
Jun 14, 2026, 1:56 AM
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Sign in to take action- Introduced
- Passed House
- Passed Senate
- To President
- Became Law
Sponsors
Official sponsors from legislative records.
Primary sponsor
Erin Houchin
HouseINRepublicanDistrict 9
Cosponsors
Celeste Maloy
HouseUTRepublicanDistrict 2
Debbie Dingell
HouseMIDemocratDistrict 6
Dusty [R-SD-At Large] Johnson
HouseDistrict 0
Nicholas A. Langworthy
HouseNYRepublicanDistrict 23
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