About Evarcha arcuata (Clerck, 1757)
Like many jumping spiders, Evarcha arcuata shows clear sexual dimorphism in both size and coloration. Males grow to a body length of roughly 4.1 to 4.9 millimeters, while females are larger, with a body length of 4.8 to 5.8 millimeters. For males, the cephalothorax is dark brown to black, with white stripes along its margins and a single white stripe down its center. The clypeus is covered in white scales. The dorsal surface of the male opisthosoma is dark brown to black, with white lateral stripes that curve inward toward the back, forming an arched pattern. The underside of the male body is dark gray to black. For females, the cephalothorax is yellow-brown, with white marginal stripes and a median stripe that is less distinct than that of males. The female clypeus has only sparse white scales. The dorsal surface of the female opisthosoma is yellow-brown, marked with a pattern of white and dark markings that form chevron-like shapes, and the female venter is yellow-brown to gray. Individuals of both sexes have yellow-brown legs marked with darker ring-shaped annulations. Male pedipalps are dark brown to black, while female pedipalps are yellow-brown. Evarcha arcuata has a broad distribution across the Palearctic realm, stretching from Europe through Asia to the Far East. It is found throughout Europe, and its range extends into Turkey, the Caucasus region, and across Russia from its European territories to the Far East, including Siberia. It also occurs in Kazakhstan, Iran, Central Asia, China, and Japan. This extensive range makes E. arcuata one of the most widely distributed species in the genus Evarcha.
