Figure 3.

Monilophyte-specific inversion. Detailed view of an inversion found only in monilophyte taxa (solid black lines and grey shadow) and a second inversion found only in Adiantum capillus-veneris and Alsophila spinulosa (dashed black lines), which together represent a large clade comprising about 90% of extant fern species diversity. Additional gene loss and movements are shown with arrows (SSC = gene translocated to small single copy). The lycophyte gene order and orientation in this region is similar to that of bryophytes and seed plants (not shown). Note that the ~5 kb region between trnE and trnY unique to Equisetum arvense contains no significant open reading frames when subjected to ORF Finder (http://www.ncbi.nlm.nih.gov/gorf/gorf.html). Gene colors follow the key in Fig. 1.