. 2018 Dec 31;(811):9–45. doi: 10.3897/zookeys.811.28712
Martin Wiemers, Emilio Balletto, Vlad Dincă, Zdenek Faltynek Fric, Gerardo Lamas, Vladimir Lukhtanov, Miguel L. Munguira, Chris A. M. van Swaay, Roger Vila, Albert Vliegenthart, Niklas Wahlberg, Rudi Verovnik
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Figure 4.
Species richness of butterfly families in Europe.