Translator Disclaimer
5 February 2019 Phylogenetic Placement of New Species with Fused Calyx Reveals Homoplastic Character in Eugenia (Myrtaceae)
Augusto Giaretta, Bruno S. Amorim, Paulo T. Sano, Gustavo Souza, Eve Lucas
Author Affiliations +
Abstract

The hyper-diverse Eugenia with ca. 1050 species currently includes Calycorectes, which fits the morphological delimitation of the latter except its calyx lobes are fused in the bud and tear at anthesis. Previous phylogenetic reconstruction demonstrates a single evolutionary event of calyx fusion in Eugenia. A new species, Eugenia petaloidea, found in remnants of submontane Atlantic Forest in northeast Brazil is morphologically uniquewith two external fused calyx lobes that split at anthesis and two internal free and petaloid calyx lobes. Only a few other Eugenia species share this condition, and Eugenia petaloidea can be distinguished from those by the externally glabrous hypanthium. The phylogenetic placement of Eugenia petaloidea based on three DNA markers (ITS, ETS, and psbA-trnH) indicates that this is the second clade of Eugenia known to have a fused calyx, indicating fusion of the calyx to be a homoplastic condition. The new species is here described, illustrated, and assessed according to IUCN criteria.

© Copyrigh 2019 by the American Society of Plant Taxonomists
Augusto Giaretta, Bruno S. Amorim, Paulo T. Sano, Gustavo Souza, and Eve Lucas "Phylogenetic Placement of New Species with Fused Calyx Reveals Homoplastic Character in Eugenia (Myrtaceae)," Systematic Botany 44(1), 66-73, (5 February 2019). https://doi.org/10.1600/036364419X697903
Published: 5 February 2019
JOURNAL ARTICLE
8 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top