Michelsen, V., & Palmer, M. W. (2020). Pegomya disticha Griffiths and P. cedrica Huckett (Diptera: Anthomyiidae)—first documented case of insects trespassing the silica barrier of Common scouring-rush, Equisetum hyemale L. Zootaxa, 4718(3), 355–370. https://doi.org/10.11646/zootaxa.4718.3.4