A wolf spider is a medium to large arachnid of the family Lycosidae, with body lengths ranging from 0.25 to 1.5 inches (0.64 to 3.81 cm), depending on the species.

Traditionally, arachnids were considered a terrestrial monophyletic group—meaning they descended from a single colonization event of land by a terrestrial ancestor. However, recent phylogenomic ...