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313 / Mesozoic
Baculites
Baculites compressus
Its adult shell stretched into a near-straight rod while retaining ammonite sutures.
- Time range
- About 81–66 million years ago
- Final stage
- End of the Cretaceous
- Geographic range
- Western Interior Seaway · North America
01 / DEFINITION & ECOLOGY
What was Baculites?
Baculites (Baculites compressus) was an extinct organism known from About 81–66 million years ago, with a range in Western Interior Seaway · North America.
Life and ecology
The animal occupied the final chamber and regulated buoyancy through internal chambers.
02 / DISAPPEARANCE
Why did Baculites disappear?
Impact-driven food-web collapse eliminated every ammonite lineage.
03 / EVIDENCE
How do scientists know about Baculites?
Abundant shells, septa, sutures and jaws document growth and affinity.
04 / SOURCES & FURTHER READING
Check the source record
Use the scientific name to compare taxonomy, occurrence records and the fossil record. Database coverage and classifications may differ.
05 / REVISION HISTORY
How has this record changed?
- Verified authoritative entity sources and added three responsive reconstruction sizes.
- Initial bilingual species record published.
06 / CORRECTIONS & ADDITIONS