HR 9191
Passed a chamber
Designates the American mastodon as the national fossil mammal and the Tyrannosaurus rex as the national fossil dinosaur of the United States.
Official title: National Fossil Act of 2026
Timeline each lane is a chamber; dates pull from congress.gov actions
House
Introduced
08-JUN-2026
Referred
08-JUN-2026
Approved by committee
15-JUL-2026
Reported
08-SEP-2026
Passed
16-SEP-2026
Senate
Received
17-SEP-2026
- Names the American mastodon (Mammut americanum) the national fossil mammal.
- Names the Tyrannosaurus rex the national fossil dinosaur.
- Adds the designations as a new section in chapter 3 of title 36, United States Code, and updates the chapter heading and table of contents to match.
Covers an older version. The newest CRS summary describes the bill as of "Reported to House" (08-SEP-2026); the text has changed since (Engrossed in House, 16-SEP-2026).
CRS is the Library of Congress's nonpartisan research office. Read it on congress.gov- Judiciary Committee (House)
- Judiciary Committee (Senate)
Government Operations and Politics
■ 7 R■ 2 D
7 Republicans
2 Democrats