Theridion fuscodecoratum is a species of spider commonly known as the brown-decorated cobweb spider. It is characterized by its small size, measuring around 4-5 mm in length. This spider is typically found in forested areas, where it constructs intricate cobwebs to capture its prey. The body of Theridion fuscodecoratum is predominantly brown in color, with distinct patterns and markings that help it blend into its surroundings.