SUPPLEMENTARY MATERIAL In the shadow of phylogenetic uncertainty: the recent diversification of the Lysandra butterflies through chromosomal change Gerard Talaveraa,b,c, Vladimir A. Lukhtanovb,d, Lukas Rieppelc,e, Naomi E. Piercec and Roger Vilaa,* aInstitut de Biologia Evolutiva (CSIC-UPF), Passeig Marítim de la Barceloneta, 37, 08003 Barcelona, Spain b Faculty of Biology & Soil Science, St Petersburg State University, Universitetskaya nab. 7/9, 199034 St Petersburg, Russia c Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, 26 Oxford Street, Cambridge, Massachusetts 02138, USA d Department of Karyosystematics, Zoological Institute of Russian Academy of Science, Universitetskaya nab. 1, 199034 St Petersburg, Russia e Department of History, Brown University, 79 Brown Street, Providence, RI 02192, USA *Corresponding author:
[email protected] SUPPLEMENTARY DISCUSSION Phylogenetic relationships We recover three well-differentiated clades plus three species with apparently no close relative (L. syriaca, L. dezina and L. ossmar). One of the strongly supported clades is formed by L. punctifera and L. bellargus, a grouping that corresponds very well to morphology. In fact L. punctifera and L. bellargus are so similar in their wing patterns that the taxon punctifera, first described by Oberthür in 1876 was initially considered a subspecies of L. bellargus. Much later, de Lesse (1959) assigned punctifera species status based on differences in chromosome number. These two taxa split ca. 0.74 Mya, possibly because of dispersal across the West Mediterranean (perhaps through the Gibraltar Strait), since L. bellargus is widespread in the Iberian Peninsula and across Europe into Western Asia, while L. punctifera is confined to the Southwestern Mediterranean shore (Morocco, N.