Abstract
AbstractDavalliaceae have been classified on the basis of morphological data or morphological and molecular data. The family has been divided into various genera, the circumscription of which may differ between authors. Previous phylogenetic analyses used limited numbers of genes and taxa. We studied the molecular phylogeny of the family by using two nuclear markers (LEAFY intron 1, gapCp intron) and a long chloroplast marker (atpB‐rbcL‐accD) in 55 specimens of 41 species. The results indicated that Davalliaceae are divided into seven clades, six of which coincide with the genera and sections sensu Kato & Tsutsumi. The relationships among the clades were inconsistent with respect to the markers analyzed, and a species tree derived from all datasets did not resolve the relationships. In addition, the clades were not well characterized to be classified at the genus level. Therefore, we propose to classify Davalliaceae in the single genus Davallia with seven sections, i.e., sect. Araiostegiella, sect. Davallia (comprising only D. canariensis), sect. Davallodes (including Araiostegia p.p. and Paradavallodes), sect. Humata (including Pachypleuria and Parasorus), sect. Scyphularia (s.l. = sect. Davallia sensu Kato & Tsutsumi excluding the type), sect. Trogostolon (s.l. = sect. Trogostolon sensu Kato & Tsutsumi), and sect. Cordisquama (s.l. = Wibelia sensu Kato & Tsutsumi). A key to the sections and a table of characters for the sections are provided.
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