Paleolimulus signatus Horseshoe crab 3D-malli almost 4 years 66 Carcinoscorpius rotundicauda Horseshoe crab 3D-malli almost 4 years 73 Limulus Horseshoe Crab 3D-malli almost 4 years 133 Mesolimulus walchi Horseshoe crab 3D-malli almost 4 years 45 Limulus polyphemus Horseshoe crab 3D-malli almost 4 years 111 Tachypleus tridentatus Horseshoe crab 3D-malli almost 4 years 67