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A CLADISTIC ANALYSIS OF ANGOPHORA CAV. (MYRTACEAE)
Kevin Thiele1, Pauline Y Ladiges1
1School of Botany, University of Melbourne, Parkville 3052, Australia.
Cladistics : the International Journal of the Willi Hennig Society
|December 22, 2021
Summary
This study presents a cladistic analysis of Angophora using morphological data, revealing four main clades and a new classification. Biogeographic analysis of eastern Australia
Area of Science:
- Botany
- Systematics
- Phylogenetics
Background:
- Angophora Cav. is a genus of flowering plants in the family Myrtaceae.
- Previous classifications of Angophora have been based on limited data.
Purpose of the Study:
- To conduct a cladistic analysis of the genus Angophora using quantitative morphological characters.
- To establish a new infra-generic classification for Angophora based on phylogenetic relationships.
- To investigate the biogeography of Angophora in eastern Australia.
Main Methods:
- Cladistic analysis using a data set of quantitative morphological characters.
- Generalized Gap-Coding for multistate coding of characters, treated as ordered sequences.
- Branch and bound method to generate a minimal-length, unrooted tree.
- Component analysis for biogeographic study.
Main Results:
- A consensus cladogram comprising four main clades was derived.
- A new infra-generic classification of Angophora with four series and two subseries was proposed.
- New names and combinations were published: Angophora series Floribundinae, Subvelutininae, Bakerinae, subseries Costntitac, A. leiocarpa, and A. paludosa.
Conclusions:
- The study provides a robust phylogenetic framework for Angophora.
- The new classification reflects the evolutionary relationships within the genus.
- The biogeographic analysis clarifies species distribution patterns in eastern Australia.
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