The Pamphiliidae are a small family within the Symphyta, containing some 200 species from the temperate regions of North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

 and Eurasia

Eurasia

Eurasia is a continent or supercontinent comprising the traditional continents of Europe and Asia ; covering about 52,990,000 km2 or about 10.6% of the Earth's surface located primarily in the eastern and northern hemispheres...

. The larvae feed on plants (often conifers), using silk to either build webs or tents, or to roll leaves into tubes, in which they feed, thus earning them the common names leaf-rolling sawflies or web-spinning sawflies. They are distinguished from the closely related Megalodontesidae

Megalodontesidae

The Megalodontesidae are a small family of sawflies within the Symphyta, containing some 40 species restricted to the temperate regions of Eurasia, and whose larvae feed on herbaceous plants...

 by their simple, filiform antennae.

Extant genera

• Acantholyda
  Acantholyda
  Acantholyda is a genus of sawflies.-Species:* Acantholyda erythrocephala type species, Eurasia* Acantholyda aequorea Middlekauff, 1958 North America * Acantholyda aglaia...
  
  Costa, 1894
• Caenolyda Konow, 1897
• Cephalcia Panzer, 1805
• Kelidoptera Konow, 1897
• Neurotoma Konow, 1897
• Onycholyda Takeuchi, 1938
• Pamphilius Latreille, 1802
• Pseudocephaleia Zirngiebl, 1937