Indo-Asian Eriolaena expanded to include two Malagasy genera, and other generic realignments based on molecular phylogenetics of Dombeyoideae (Malvaceae)

Molecular phylogenetic analyses of Malvaceae subfamily Dombeyoideae based
on a 6-marker dataset sampling all 21 currently accepted genera (including
extinct Astyria) yielded improved resolution and evidence for multiple
generic circumscription problems. The taxonomy of the subfamily is
adjusted with the synonymization of 10 genera (eight in current use) and
the description of one new one, for a revised Dombeyoideae comprised of 14
genera and supported by morphological, anatomical, and/or palynological
evidence. Eriolaena is expanded from a narrow Indo-Asian group to include
the Malagasy endemic genera Helmiopsis and Helmiopsiella, and a recently
described species from continental Africa. A conspectus is presented of
the new broadly circumscribed Eriolaena with 27 species (28 taxa,
including 3 new Malagasy species and 16 new combinations) and defined by a
unique winged-seed morphology. A new monotypic Malagasy genus (Hafotra),
resolved as sister to Eriolaena, is described. A conspectus is presented
of a broadly circumscribed Mascarene-Malagasy Ruizia (+ Astyria and
Trochetia, with 12 new combinations). Two other genera are expanded and
recircumscribed: Melhania (+ Trochetiopsis and Paramelhania, with one new
name and two new combinations) and Corchoropsis (+ Paradombeya, with two
new combinations). Additionally, two genera are typified, and 21 names are
lectotypified.