DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Scanning electron micrograph (SEM) of Daddy longlegs (Pholcus sp.) chelicerae (fangs). Daddy longlegs spiders belong to the family Pholcidae, commonly known as cellar spiders. Some genera in this family, especially Pholcus phalangioides, are commonly called daddy long-legs spider, granddaddy long-legs spider, carpenter spider, daddy long-legger, or vibrating spider. There is confusion among the name daddy long-legs since the name also applies to two related arthropod groups: the harvestmen (which are arachnids but not spiders), and crane flies (which are insects). Pholcids are fragile arachnids, the body being 3-12mm in length with legs which may be up to 60mm long. The genus Pholcus has a cylindrical abdomen and the eyes are arranged in two lateral groups of three and two smaller median eyes. Eight and six eyes both occur in this family. Magnification: x52 when shortest axis printed at 25 millimetres.
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