Pholcidae

Pholcidae, commonly known as cellar spiders, are a spider family in the suborder Araneomorphae. The family contains about 1500 species divided into about 80 genera.

Some species, especially Pholcus phalangioides, are commonly called daddy long-legs spider, granddaddy long-legs spider, carpenter spider, daddy long-legger, vibrating spider or skull spider.

Confusion often arises because the name "daddy long-legs" is also applied to two other, distantly related groups of arthropods: harvestmen (which are arachnids but not spiders) and crane flies (which are insects).