Philodromidae, also known as philodromid crab spiders and running crab spiders, is a family of araneomorph spiders first described by Tord Tamerlan Teodor Thorell in 1870. It contains over 600 species in thirty genera. Most are dull colored- brown, gray, yellowish or mottled with a leaf-like cardiac mark on the anterior dorsal abdomen, and seldom reach above 10 millimetres (0.39 in) long. None of the species build webs, but they do use silk for draglines and egg sacs.
Philodromus is a genus of philodromid crab spiders. Spiders in this genus are distinctively flattened.
Philodromus insperatus is a species of running crab spider in the family Philodromidae. It is found in the United States and Canada.
Philodromus laticeps is a species of running crab spider in the family Philodromidae. It is found in the United States.
Philodromus californicus is a species of running crab spider in the family Philodromidae. It is found in North America.
Philodromus minutus is a species of running crab spider in the family Philodromidae. It is found in the United States and Canada.
Philodromus placidus is a species of running crab spider in the family Philodromidae. It is found in North America.
Philodromus oneida is a species of running crab spider in the family Philodromidae. It is found in the United States and Canada.
Philodromus rodecki is a species of running crab spider in the family Philodromidae. It is found in the United States and Canada.
Philodromus quercicola is a species of running crab spider in the family Philodromidae. It is found in the United States.
Philodromus speciosus is a species of running crab spider in the family Philodromidae. It is found in the United States and Canada.
Philodromus josemitensis is a species of running crab spider in the family Philodromidae. It is found in the United States and Canada.
Philodromus exilis is a species of running crab spider in the family Philodromidae. It is found in the United States and Canada.
Philodromus marxi, the metallic crab spider, is a species of running crab spider in the family Philodromidae. It is found in the United States. They are a sexually dimorphic species. The males are smooth with a metallic sheen and the females present as bristly white and grey.
Philodromus peninsulanus is a species of running crab spider in the family Philodromidae. It is found in the United States and Canada.
Philodromus praelustris is a species of running crab spider in the family Philodromidae. It is found in the United States and Canada.
Philodromus keyserlingi is a species of running crab spider in the family Philodromidae. It is found in the United States and Canada.
Philodromus imbecillus is a species of running crab spider in the family Philodromidae. It is found in the United States and Canada.
Philodromus floridensis is a species of running crab spider in the family Philodromidae. It is found in the United States.
Philodromus mineri is a species of running crab spider in the family Philodromidae. It is found in the United States.
