Literature
- Various contributors 2017. Hymenoptera Online (HOL) [accessed 8 March 2017]. [link]
Literature references linked to higher taxa
- Encyclopedia of Life. [link] (Hymenoptera)
- Maddison, D. (ed.). Tree of Life web project. [link] (Apoidea)
Square-headed and Sand Wasps Crabronidae
Classification
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Cerceris
[genus]
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Nitela
[genus]
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Trypoxylon
[genus]
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