Eocarcinus
| Eocarcinus Temporal range: | |
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| Holotype (top) and paratype (bottom) specimens | |
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| Family: | Eocarcinidae Withers, 1932 |
| Genus: | Eocarcinus Withers, 1932 |
| Species: | E. praecursor |
| Binomial name | |
| Eocarcinus praecursor Withers, 1932 | |
Eocarcinus praecursor is a Jurassic species of decapod crustacean, sufficiently distinct from its relatives to be placed in its own family (Eocarcinidae). Often considered the oldest true crab, it was considered by a 2010 study to be an early member of the Anomura. However, a reanalysis in 2020 again found it to be the earliest known stem-group crab.