Toward a phylogenetic reclassification of the subfamily Ambavioideae (Annonaceae): establishment of a new subfamily and a new tribe
AUTOR(ES)
Chaowasku, Tanawat
FONTE
Acta Bot. Bras.
DATA DE PUBLICAÇÃO
2020-09
RESUMO
ABSTRACT A molecular phylogeny of the subfamily Ambavioideae (Annonaceae) was reconstructed using up to eight plastid DNA regions (matK, ndhF, and rbcL exons; trnL intron; atpB-rbcL, psbA-trnH, trnL-trnF, and trnS-trnG intergenic spacers). The results indicate that the subfamily is not monophyletic, with the monotypic genus Meiocarpidium resolved as the second diverging lineage of Annonaceae after Anaxagorea (the only genus of Anaxagoreoideae) and as the sister group of a large clade consisting of the rest of Annonaceae. Consequently, a new subfamily, Meiocarpidioideae, is established to accommodate the enigmatic African genus Meiocarpidium. In addition, the subfamily Ambavioideae is redefined to contain two major clades formally recognized as two tribes. The tribe Tetramerantheae consisting of only Tetrameranthus is enlarged to include Ambavia, Cleistopholis, and Mezzettia; and Canangeae, a new tribe comprising Cananga, Cyathocalyx, Drepananthus, and Lettowianthus, are erected. The two tribes are principally distinguishable from each other by differences in monoploid chromosome number, branching architecture, and average pollen size (monads). New relationships were retrieved within Tetramerantheae, with Mezzettia as the sister group of a clade containing Ambavia and Cleistopholis.
Documentos Relacionados
- A new fossil subfamily of Bethylidae (Hymenoptera) from the Early Cretaceous Lebanese amber and its phylogenetic position
- Seed weight of Xylopia aromatica (Annonaceae): quality evaluation from X-ray and seedling emergence
- Phylogenetic analysis of anaerobic thermophilic bacteria: aid for their reclassification.
- Systematics of the subfamily Poeciliinae Bonaparte (Cyprinodontiformes: Poeciliidae), with an emphasis on the tribe Cnesterodontini Hubbs
- Establishment of zygomorphy on an ontogenic spiral and evolution of perianth in the tribe Delphinieae (Ranunculaceae)