1903 in paleontology

Sauropterygians

• Plesiosaur gastroliths documented.

Synapsids

Non-mammalian

Name	Novelty	Status	Authors	Age	Unit	Location	Notes	Images
Lycosuchus	gen et sp	Valid	Broom	Middle Permian	Middle Abrahamskraal Formation	South Africa Eutherians Cetaceans Pholidotes Name Authors Age Location Notes Images Metacheiromys Wortman 48 Million years ago. United States