Claramunt, S. ., LSU Museum of Natural Science and Dpt. of Biological Sciences, Baton Rouge, USA, sclara1@lsu.edu

IS FURNARIIDAE AN ADAPTIVE RADIATION? A NEW TEST USING MORPHOMETRIC DIVERSITY

Although the Furnariidae has been regarded as one of the most spectacular examples of a continental adaptive radiation, this assertions as never been put to rigorous test. Here I present the first quantitative study of the morphometric diversity of furnariids. I compared furnariids with six other Neotropical families in the superfamily Furnarioidea using eleven measures of the external anatomy. I developed a new multivariate measure of morphometric diversity that takes covariation into account. Then, I used a linear regression model that incorporates information on time of divergence, as estimated by molecular dating, and species richness of each family to test whether the morphometric diversity of Furnariidae is unusually high. I found that Furnariidae is not unusually diverse in size, but it is significantly more diverse in shape. This represents the first quantitative test of the high ecomorphological diversity of Furnariidae, and evidence that they represents an authentic continental adaptive radiation.

Oral presentation

Session #:G14
Date: Tuesday, 8/5/08
Time: 12:00 PM

Presentation is given by student: Yes