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Temporal range: Early Cretaceous, 125Ma
Fossil of Jeholodens jenkinsi.jpg
Fossil specimen, National Museum of Nature and Science, Tokyo
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Eutriconodonta
Family: Jeholodentidae
Genus: Jeholodens
Ji et al., 1999
Type species
Jeholodens jenkinsi
Ji et al., 1999

Jeholodens was a primitive mammal belonging to the Triconodonta family, and which lived in present-day China during the Middle Cretaceous about 125 million years ago.

Known only from a single specimen, the holotype consists of a virtually complete articulated skull and skeleton, it shared its corporal characteristics with most other Mesozoic mammals; it was a long-tailed, nocturnal tetrapod (with prehensile fingers and toes) which hunted insects, its food, during the night.

Jeholodens jenkinsi fossil displayed in Hong Kong Science Museum

It is suspected to be a nocturnal creature because it had very large eyes which were roughly 5 cm across. This would have allowed it to have better night vision for catching insects. It was a relatively advanced mammal for its time and had larger shoulders blades and collar bone; it also had grasping hands.