Theridiid spiders are a fascinating group of arachnids that are found all around the world. They are commonly known as cobweb or comb-footed spiders, due to the unique comb-like structure on their hind legs. Although their name is specific to this family of spiders, there are several synonyms that can be used to refer to them. Some of these synonyms include black widows, redbacks, and widow spiders, which are all found within the family Theridiidae. These spiders are known for their distinctive, shiny black bodies, and are notorious for their venomous bite. Despite their ominous reputation, theridiid spiders play an important role in controlling insect populations and are a valuable part of many ecosystems.