A new species of portunid crab from the early Pleistocene Old Pera beds of Jamaica

contains a diverse fauna of crabs, superior to that known from this interval on any other Antillean island. A new species described herein is the first crab from the early Pleistocene Old Pera beds, Manchioneal Formation. This taxon, Euphylax fortispinosus sp. nov., has a subovate carapace, a long orbitofrontal margin with deep corneal depressions and four pairs of anterolateral spines; the first pair are diminutive. It represents the first record of the genus Euphylax Stimpson in the Jamaican fossil record, whose present distribution is confined to the Pacific coast of tropical Central America and the eastern tropical Pacific