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Encyclopedic overview
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thumb|left|Caenolyda reticulata
The Pamphilioidea are a small superfamily within the Symphyta (the sawflies), containing some 250 living species restricted to the temperate regions of Eurasia and North America. These hymenopterans share the distinctive feature of a very large, almost prognathous head, which is widest ventrally.
Excerpted from Wikipedia’s “Pamphilioidea” article, available under the CC BY-SA 4.0 licence.