1900 in paleontology
Paleontology or palaeontology is the study of prehistoric life forms on Earth through the examination of plant and animal fossils.[1] This includes the study of body fossils, tracks (ichnites), burrows, cast-off parts, fossilised feces (coprolites), palynomorphs and chemical residues. Because humans have encountered fossils for millennia, paleontology has a long history both before and after becoming formalized as a science. This article records significant discoveries and events related to paleontology that occurred or were published in the year 1900.
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Sauropterygia
    
    Newly named plesiosaurs
    
| Name | Novelty | Status | Authors | Age | Unit | Location | Notes | Images | 
|---|---|---|---|---|---|---|---|---|
| Knight | Sundance Formation, Wyonming | recombined as Tatenectes laramiensis in 2003 | ||||||
Synapsids
    
    Non-mammalian
    
| Name | Novelty | Status | Authors | Age | Unit | Location | Notes | Images | 
|---|---|---|---|---|---|---|---|---|
| Dicranozygoma | Gen. et sp. nov | Seeley | A dicynodont of uncertain position | |||||
| Gen. et sp. nov | Valid | Broom | Late Permian | A member of Baurioidea. | ||||