Alvarezsauridae
family · Bonaparte 1991 · accepted · extinct
38 descendant taxa · 40 fossil sites · 15 formations · 7 countries
Lived when
Cretaceous – Paleogene
100.5–66 million years ago
Found where
7 countries
15 rock formations
Fossil record
40 sites
22 catalogued specimens
Inside this group
Immediate children
- Terminal taxon — no children recorded.
Did you know
Facts from the record
- Its fossils span about 35 million years, from 100.5 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.
- Alvarezsauridae was named in 1991 (Bonaparte 1991) — 35 years ago.
- Fossils have been recorded in 7 countries and 15 named rock formations.
- 22 individual specimens are catalogued in museum collections.
- This group contains 38 named taxa, including 17 species.
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Where next
Data from the Paleobiology Database (CC BY 4.0).