Systematics Section / ASPT
Mast, Austin , Weston, Peter , Jones, Eric .
Integrating phylogeny, biogeography, and fossil dates in the grevilleoid Proteaceae.
Proteaceae (79 genera) is paradigmatic in our understanding of the biotic diversification driven by the break-up of the southern supercontinent Gondwana and subsequent edaphic and climatic changes on the resulting fragments. It is well suited to this by its extensive fossil record (beginning ca. 85 mya) and its sizeable membership in such global biodiversity hotspots as the NE Australian rainforests and SW Australian and SW African heathlands. Subfamily Grevilleoideae (44 genera) is the largest and most widely distributed of the seven subfamilies. We sampled the chloroplast matK gene and exons 9, 10, and 11 of the nuclear waxy gene from most genera in the subfamily. MatK provides 2x more informative characters and 2.5x more strongly supported branches than does the previously sampled atpB gene and atpB/rbcL spacer combined. Members of the subfamily appear to have two copies of waxy. Of the seven tribes in the subfamily only two (Banksieae and Grevilleeae) appear monophyletic. We will discuss the biogeographic patterns in the phylogeny in the light of dates derived using multiple calibration points from the fossil record.
1 - Royal Botanical Gardens, Sydney, New South Wales, 2000, Australia
2 - Florida State University, Dept. of Biological Science, Tallahassee, Florida, 32306, United States
Presentation Type: Paper
Location: Cottonwood A (Snowbird Center)
Date: Wednesday, August 4th, 2004
Time: 12:00 PM