👉 Tsuranarthrura is a genus of marine animals in the family Saurischia, which includes echinoderms such as sea urchins and crabs. These creatures are characterized by their hard, bony shells that can be up to 20 cm long and often have two pairs of arms or legs. The name "Tsuranarthrura" is derived from the Greek word "tisra," meaning "shell."
