Ankylopollexia
unranked clade · (Sereno 1986) · accepted · extinct
342 descendant taxa · 2,331 fossil sites · 336 formations · 45 countries
Lived when
Jurassic – Paleogene
201.4–61.66 million years ago
Found where
45 countries
336 rock formations
Fossil record
2,331 sites
232 catalogued specimens
Inside this group
Immediate children
- Terminal taxon — no children recorded.
Did you know
Facts from the record
- Its fossils span about 140 million years, from 201.4 to 61.66 million years ago.
- The youngest known fossil is around 61.66 million years old — that is roughly 206 times further back than the whole of human history.
- Ankylopollexia was named in 1986 ((Sereno 1986)) — 40 years ago.
- Fossils have been recorded in 45 countries and 336 named rock formations.
- 232 individual specimens are catalogued in museum collections.
- This group contains 342 named taxa, including 171 species.
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Where next
Data from the Paleobiology Database (CC BY 4.0).