Pentacrinus subangularis, crinoids Styracosaurus scientifically described fossil bones given

scientifically described fossil bones given to him by saltpeter miners found in a Monroe County cave in 1797

closely related gomphothere genus

is the largest and best-known genus of an extinct Permian order of seed ferns

other scientists took issue with the study's methods

The Adena culture was a Pre-Columbian Native American culture that existed from 1000 BC to 200 BC

Pentacrinus subangularis, crinoids Styracosaurus scientifically described fossil bones givenCrinoids are assigned to the phylum Echinodermata, a group of radially symmetrical marine animals, such as the starfish, sea urchins, and brittle stars. Crinoids are commonly referred to as "sea lilies". These flower like marine invertebrate animals are beautifully colored and live as solitary individuals. This species is characterized by a globular body enclosed by a small calyx, from which freely moving arms extended upward to gather food. At the