trechaleid spider exoskeleton

adult animal arachnid arachnida arachnidae arachnids araneomorphae arthropod arthropoda brown chelicerata chelicerate detail entelegynae entelegyne exoskeleton exuvia exuviae fauna insect invertebrate invertebrates lake lycosoidea metamorphose metamorphosis molting moult natural nature predator river sand shell skin spider spiders transformation trechaleid trechaleidae water wild wildlife wolf