Explore this animal in Size of Extinct Animals ↗
325 / Paleozoic
Crassigyrinus
Crassigyrinus scoticus
Tiny limbs and strong jaws show an early tetrapod returning almost completely to water.
View original image · 1536 × 1024- Time range
- About 330 million years ago
- Final stage
- Middle Carboniferous
- Geographic range
- Coal-swamp channels · Scotland
01 / DEFINITION & ECOLOGY
What was Crassigyrinus?
Crassigyrinus (Crassigyrinus scoticus) was an extinct organism known from About 330 million years ago, with a range in Coal-swamp channels · Scotland.
Life and ecology
A long trunk and deep tail carried Crassigyrinus through turbid channels after fish prey.
02 / DISAPPEARANCE
Why did Crassigyrinus disappear?
Turnover in wetlands and aquatic tetrapods is possible context, but it does not establish why this specialized lineage disappeared.
03 / EVIDENCE
How do scientists know about Crassigyrinus?
Skulls, shoulder bones, minute forelimbs and vertebrae document its aquatic build.
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?
- Rewrote an extinction cause that presented environmental or faunal turnover as established; it is now given as context the record does not prove.
- Verified authoritative entity sources and added three responsive reconstruction sizes.
- Initial bilingual species record published.
06 / CORRECTIONS & ADDITIONS