Abstract Detail

Clarifying Early Euasterid Evolution: A Synthesis of Phylogeny, Morphology, and the Fossil Record

Stull, Gregory W. [1], Byng, James W. [2], Utteridge, Timothy M. [3], Soltis, Douglas E. [4], Manchester, Steven [5], Soltis, Pamela S. [6].

Integrating genomic, morphological, and fossil data for phylogeny reconstruction in Icacinaceae.

Few studies have explored the feasibility of integrating morphological data—from modern and fossil taxa—with genome-scale data sets, which are now readily available due to continued advances in DNA sequencing technology. We present a phylogenetic study of Icacinaceae (Lamiidae) based on ca. 100 nuclear genes, plastid genomes, and ca. 50 (primarily fruit) morphological characters, sampled from 110 extant species and up to 20 fossil taxa. Icacinaceae are a pantropical clade comprising 23 genera and ca. 150 species, phylogenetically positioned in Icacinales (following APGIV), which are sister to all other lamiids. The family is notable for having an extensive, diverse fossil record spanning a considerable geographic and stratigraphic breadth, making them well suited for this integrative study. Using a variety of analytical methods (including likelihood and novel Bayesian methods for including fossils), we evaluate the best approaches for integrating these types of data sets for both phylogenetic and dating analyses, and highlight avenues for future work. We also discuss the implications of our results for understanding the age, diversification, and biogeographic history of Icacinaceae and the basal lamiids.

1 - University Of Florida, Florida Museum Of Natural HIstory, Dickinson Hall, Museum Rd. And Newel Dr., Gainesville, FL, 32611, USA
2 - Plant Gateway, 5 Talbot Street, Hertford, SG13 7BX, UK
3 - Royal Botanic Gardens, Kew, Identification and Naming, Richmond, Surrey, TW9 3AB, UK
4 - University Of Florida, Florida Museum Of Natural History, 1659 Museum Rd., Gainesville, FL, 32611, USA
5 - University of Florida, Florida Museum of Natural History, 1659 Museum Rd., Gainesville , FL, 32611, USA
6 - University Of Florida, Florida Museum Of Natural History, PO BOX 117800, Gainesville, FL, 32611-7800, USA, 352/273-1964

Keywords:
low-copy nuclear markers
Lamiidae
phylogenomics
Plastome
Icacinaceae
fossil endocarps
morphology.

Presentation Type: Colloquium Presentations
Session: C3, Clarifying early euasterid evolution: A synthesis of phylogeny, morphology, and the fossil record
Location: Chatham Ballroom - C/Savannah International Trade and Convention Center
Date: Wednesday, August 3rd, 2016
Time: 9:30 AM
Number: C3005
Abstract ID:677
Candidate for Awards:None