Hesperornithidae
unranked clade · (Marsh 1872) · accepted · extinct
19 descendant taxa · 76 fossil sites · 16 formations · 5 countries
Lived when
Cretaceous – Paleogene
100.5–66 million years ago
Found where
5 countries
16 rock formations
Fossil record
76 sites
0 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.
- Hesperornithidae was named in 1872 ((Marsh 1872)) — 154 years ago.
- Fossils have been recorded in 5 countries and 16 named rock formations.
- This group contains 19 named taxa, including 14 species.
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Where next
Data from the Paleobiology Database (CC BY 4.0).