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This list of the Paleozoic life of Kentucky contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Kentucky and are between 538.8 and 252.17 million years of age.
Fossils of the Carboniferous-Permian bryozoan Archimedes †Archimedes †Archimedes communis †Archimedes compactus †Archimedes distans †Archimedes invaginatus †Archimedes lativolvis †Archimedes macfarlani †Archimedes meekanoides †Archimedes meekanus †Archimedes proutanus †Archimedes swallowvanus †Archimedes terebriformis
The ancient swamps of Pennsylvanian Kentucky left behind many fossils. [8] A fossil trackway preserved in McCreary County is among the oldest fossil evidence for the existence of reptiles. [4] The interval spanning the Permian Period and Mesozoic Era are almost completely absent from the state's rock record. [2]
Previously considered to be the oldest known true crab, a 2010 revision concluded that Eocarcinus could not be accommodated among the Brachyura, and was instead transferred to the Anomura. [6] However, a 2020 reanalysis found that it was again the earliest known stem-group crab, but that it had not undergone the process of carcinisation. [2]
This article contains a list of fossil-bearing stratigraphic units in the state of Kentucky, U.S. Sites. Group or Formation
The tiny crab bridges an evolutionary gap that stumped scientists for years. Fossil stuck in 100 million-year-old amber is oldest "true crab" ever discovered Skip to main content
Predating dinosaurs, the horseshoe crab has roamed the earth for 445 million years, surviving five mass extinctions and three ice ages, but overfishing and habitat loss pose the greatest challenge ...
The order is estimated to contain nearly 15,000 extant species in around 2,700 genera, with around 3,300 fossil species. [1] Nearly half of these species are crabs, with the shrimp (about 3,000 species) and Anomura including hermit crabs , porcelain crabs , squat lobsters (about 2500 species) making up the bulk of the remainder. [ 1 ]