Life (root) » Animalia (Animals) » Arthropoda (Arthropods) » Hexapoda (Hexapods) » Insecta (Insects) » Pterygota » Coleoptera (Beetles) » Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles) » Byrrhoidea (Pill, Water and Toe-winged Beetles) » Dryopidae (Long-toed Water Beetles) » Helichus » Helichus lithophilus