Poster Number 109
See more from this Division: General Discipline Sessions
See more from this Session: Paleontology (Posters) IV - Stratigraphy and Morphology
Abstract:
Using the bivalve genus Cucullaea as an exemplar, I present a streamlined workflow for outline morphometrics, from initial photography through to the generation of a morphological framework for identifying differences among individuals or groups in morphospace. While bivalves are particularly well suited for such analyses, this procedure can be tailored by individual researchers to quantify anatomical shapes for a variety of other taxonomic groups. Overall the procedure uses the following steps: 1) Adobe Photoshop batch processing for image enhancement, autotracing and outline exporting; 2) the NIH program ImageJ for automating the collection of XY coordinates and scale factors for each trace; 3) HANGLE programs (Haines and Crampton, 1996) for calculating Fourier coefficients, normalization and reconstruction of traces from synthetic coefficient data; and 4) the programming language R for constructing the backing grid of synthetic outline shapes for morphospace, and for calculating distance, variance and range metrics.
See more from this Division: General Discipline Sessions
See more from this Session: Paleontology (Posters) IV - Stratigraphy and Morphology