Alvarezsauroidea
unranked clade · (Choiniere et al. 2010) · accepted · extinct
56 descendant taxa · 50 fossil sites · 20 formations · 7 countries
Lived when
Jurassic – Paleogene
161.5–66 million years ago
Found where
7 countries
20 rock formations
Fossil record
50 sites
37 catalogued specimens
Inside this group
Immediate children
- Terminal taxon — no children recorded.
Did you know
Facts from the record
- Its fossils span about 96 million years, from 161.5 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.
- Alvarezsauroidea was named in 2010 ((Choiniere et al. 2010)) — 16 years ago.
- Fossils have been recorded in 7 countries and 20 named rock formations.
- 37 individual specimens are catalogued in museum collections.
- This group contains 56 named taxa, including 25 species.
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Where next
Data from the Paleobiology Database (CC BY 4.0).