About Opilio canestrinii (Thorell, 1876)
Opilio canestrinii is a species of harvestman. Males of this species grow to a maximum body length of 6 millimeters, while females reach up to 8 millimeters. Male bodies range from yellowish brown to reddish, and female bodies are lighter in color. Males have dark legs, with yellow coxae and leg "knees"; female legs have alternating light and dark rings. Females have a dark, saddle-shaped pattern on their back, with a light longitudinal stripe running through its center. Adult Opilio canestrinii can be found between June and December each year. This species most likely originated in Italy, but has spread into Central Europe since the late 1970s, and has since replaced the similar species O. parietinus in almost all areas there. It is most commonly found on the walls of buildings.
