Phylogeny, character evolution and biogeography of the genus Sclerophylax (Solanaceae)

CHIARINI, FRANCO E.; DEANNA, ROCÍO; BOHS, LYNN

TAXON

INT ASSOC PLANT TAXONOMY

Año: 2022 vol. 71 p. 1251 - 1251

0040-0262

he genus Sclerophylax (Atropina clade, Solanaceae) has 14 species recognized to date, all except two endemic to Argentina. To clarify its phylogenetic relationships, molecular sequence data from the trnL-trnF and the rpl32F-trnL intergenic spacer regions, the waxy gene and the ITS region were employed in maximum likelihood and Bayesian inference analyses. Divergence times were estimated for the combined dataset using secondary calibrations. Ancestral distribution areas were reconstructed by Bayesian binary analyses and seven morphological traits (one continuous, six discrete) were traced. Sclerophylax is monophyletic and its sister clade is Lycium + Nolana. Sclerophylax is divided into S. sect. Caducifructus (1 sp.) and the monophyletic sect. Sclerophylax (11 spp.). Sclerophylax sect. Sclerophylax includes five well-supported clades that are also supported by morphological synapomorphies; circumscription of some species remains uncertain, probably as a result of rapid diversifications