Explore this animal in Size of Extinct Animals ↗
437 / Paleozoic
Entelognathus
Entelognathus primordialis
Placoderm armor enclosed jaw-margin bones resembling those of later bony fish.
View original image · 1600 × 1067- Time range
- About 423 million years ago
- Final stage
- Late Silurian
- Geographic range
- Tropical shallow sea · Yunnan, China
01 / DEFINITION & ECOLOGY
What was Entelognathus?
Entelognathus (Entelognathus primordialis) was an extinct organism known from About 423 million years ago, with a range in Tropical shallow sea · Yunnan, China.
Life and ecology
It swam reef shallows and took small benthic invertebrates.
02 / DISAPPEARANCE
Why did Entelognathus disappear?
Silurian fish communities changed, but that turnover does not establish why this species disappeared.
03 / EVIDENCE
How do scientists know about Entelognathus?
A near-complete three-dimensional skeleton preserves armor, jaws and fins.
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