Silurian Fossils



Silurian Fossils (440 to 410 mya)

Related Interest:
Paleozoic Paleobiology

Silurian Life

Silurian FishThe Silurian saw rising sea levels due to glacial melting. Life was still predominantly marine, but the first unequivocal terrestrial fossils are found in Silurian strata. Arachnid and centipedeSilurian Crinoid fossil are found. Perhaps most important is the appearance of vascular plants, particularly Cooksonia and Lycophites. The Silurian witnessed substantial evolution of fishes. The first jawed fished appeared and jawless fishes dispersed widely. Not only does this time period mark the wide and rapid spread of jawless fish, but also the highly significant appearances of both the first known freshwater fish as well as the first fish with jaws. The first bony fish, the Osteichthyes appeared, represented by the Acanthodians with bony scales. Trilobites, eurypterids, brachiopods, bryozoa, echinoderms and molluscs were among the diverse fauna.

Silurian Fossils

Agnatha Jawless Fish
Primitive Plant Cooksonia on Eurypterid Exoskeleton
Bertie Group, New York
Eurypterus remipes
Dalmanites limulurus Trilobite
Family: Dalmanitidae
Rochester Shale Formation
Middleport, New York
Eurypterus remipes
Bertie Group, New York
Raphiophorus parvulus Trilobite
Family Raphiophoridae
Upper Silurian
Shropshire, United Kingdom
Australaster giganteus Starfish Fossil
Victoria, Australia
Spathacalymene Trilobite
Spirograptus Graptolite
New South Wales, Australia
Spathacalymene nasuta
Trilobite Order Phacopida
Family Calymenidae
Ripley County, Indiana