eurypterids kokomopterus on a white background

kokomopterus longicaudatus kokomopteridae silurian stylonurid eurypterus trilobites extinct exoskeleton paradoxides cambrian ordovician era underwater pincers sea scorpion eurypterid compoundeyes trilobite paleontology devonian science insect fossil prehistoric arthropod background nature large permian animal wildlife triassic ocean remipes water 3d seafloor