Abstract Detail

Paleobotany

Correa, Julian [1], Manchester, Steven [2].

Fagales Phylogeny and Morphological Signal.

Although molecular data fundamentally shape our understanding of phylogenetic relationships of extant taxa, morphological characters crucially integrate extinct species in phylogenetic analyses.  Morphological data, by nature of language and hypotheses, inherit biases that can prove difficult to reconcile.  To understand the significance of fossils’ relations to their clades, understanding the morphological signal is necessary.  Taking the order Fagales, a particularly fossil-rich clade, as an example, I explore morphological character attributes – index values, node location changes, clade signals and ancestral states - using a dataset expanded from Larson-Johnson 2015 including representatives of Cretaceous, Paleogene and extant genera.  Morphological based analyses retain most of the families recognized from both molecular and combined molecular-morphological, but with a different topological organization within the families.  Subsets of individual characters that describe basic cupule organization, bract/bracteole structure, and wing morphology fit with a high affinity to the resulting trees.

1 - 2510 NE 9th Street , Apt 108, Gainesville, FL, 33803, United States
2 - Florida Museum of Natural History, Dickinson Hall, Museum Rd & Newell Dr. Gainesville, Gainesville, FL, 32611, USA

Keywords:
Fagales
phylogeny
Molecular phylogeny.

Presentation Type: Poster
Session: P, Paleobotany Posters
Location: Virtual/Virtual
Date: Wednesday, July 29th, 2020
Time: 5:00 PM Time and date to be determined
Number: PPB007
Abstract ID:818
Candidate for Awards:None