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455 / Mesozoic
Bajadasaurus
Bajadasaurus pronuspinax
Paired neck spines curved forward and may have carried keratin or soft tissue.
- Time range
- About 140–135 million years ago
- Final stage
- Early Cretaceous
- Geographic range
- Semi-arid river valley · Argentina
01 / DEFINITION & ECOLOGY
What was Bajadasaurus?
Bajadasaurus (Bajadasaurus pronuspinax) was an extinct organism known from About 140–135 million years ago, with a range in Semi-arid river valley · Argentina.
Life and ecology
It browsed low and middle vegetation; the spines may have defended, displayed or both.
02 / DISAPPEARANCE
Why did Bajadasaurus disappear?
Early Cretaceous sauropod turnover removed it.
03 / EVIDENCE
How do scientists know about Bajadasaurus?
Skull and neck vertebrae preserve spine bases; coverings and function remain debated.
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