Saurischia
unranked clade · (Seeley 1888) · accepted · extant
1,143 descendant taxa · 4,398 fossil sites · 654 formations · 79 countries
Lived when
Not recorded
251.902–66 million years ago
Found where
79 countries
654 rock formations
Fossil record
4,398 sites
586 catalogued specimens
Inside this group
Immediate children
- Terminal taxon — no children recorded.
Did you know
Facts from the record
- Its fossils span about 186 million years, from 251.902 to 66 million years ago.
- The youngest known fossil is around 66 million years old — that is roughly 220 times further back than the whole of human history.
- Saurischia was named in 1888 ((Seeley 1888)) — 138 years ago.
- Fossils have been recorded in 79 countries and 654 named rock formations.
- 586 individual specimens are catalogued in museum collections.
- This group contains 1,143 named taxa, including 553 species.
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Where next
Data from the Paleobiology Database (CC BY 4.0).