Marginocephalia
unranked clade · Sereno 1986 · accepted · extinct
274 descendant taxa · 1,321 fossil sites · 136 formations · 22 countries
Lived when
Jurassic – Paleogene
161.5–66 million years ago
Found where
22 countries
136 rock formations
Fossil record
1,321 sites
172 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.
- Marginocephalia was named in 1986 (Sereno 1986) — 40 years ago.
- Fossils have been recorded in 22 countries and 136 named rock formations.
- 172 individual specimens are catalogued in museum collections.
- This group contains 274 named taxa, including 126 species.
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Where next
Data from the Paleobiology Database (CC BY 4.0).