Euproops danae/Horseshoe Crab Prosomal - Mazon Creek Fossil afbacac40d7ced96055b63c691e7d58c animals that died were buried

animals that died were buried so quickly in the mud

They show little to no matrix

The name Ammonite was derived from "ammonis cornua

lightweight

Euproops danae/Horseshoe Crab Prosomal - Mazon Creek Fossil afbacac40d7ced96055b63c691e7d58c animals that died were buriedHorseshoe crabs are really not crabs at all. Though they resemble crustaceans, they belong to a separate class, Chelicerata, and are closer to the eurypterids. Their nearest living relatives are scorpions, ticks, and land spiders. They are considered to be living fossils because of the great similarity between modern and fossil forms. Ranging from the Late Ordovician (roughly 450 million years ago) to the present, they are little changed in the last