Supplementary figures from: Is 3D, a more accurate quantitative method than 2D, crucial for analyzing disparity patterns in extinct marine arthropods (Trilobita)?

Phacopid trilobites are well documented during the Paleozoic. Nevertheless, while 2D quantitative analyses have advanced our understanding of the morphological relationships among trilobites, the quantification of their morphological traits in 3D remains rarely documented. Based on two sets of morphological data (head and tail), 2D versus 3D shape quantification approaches were used to explore shape allometries as well as to explore how the shape variations can be explained by the phylogenetic relationships among phacopid trilobite species for the first time. We demonstrate that (1) there are similar patterns of morphological variability across taxa in 3D and 2D; (2) there are rather congruent results between 3D and 2D to discriminate taxa; (3) 2D and 3D landmarks capture different levels of detail, and the third dimension in 3D is very important for making taxonomic distinctions at the genus level; (4) there is congruity between 2D and 3D datasets for allometric patterns with results s..., The pdf file is structured to provide six supplementary figures from: Is 3D, a more accurate quantitative method than 2D, crucial for analyzing disparity patterns in extinct marine arthropods (Trilobita)?, , # Supplementary figures from: Is 3D, a more accurate quantitative method than 2D, crucial for analyzing disparity patterns in extinct marine arthropods (Trilobita)?

Dataset DOI: [10.5061/dryad.rn8pk0pmj](10.5061/dryad.rn8pk0pmj)

## Description of the data and file structure

The pdf file is structured to provide six supplementary figures from: Is 3D, a more accurate quantitative method than 2D, crucial for analyzing disparity patterns in extinct marine arthropods (Trilobita)?

### Files and variables

#### File: SupplementaryFigures.pdf

**Description:** 

*Supplementary Figure A. 3D plot of shape change vector after a generalized Procrustes analysis (GPA) on 60 specimen configurations (cephala) associated with PC1 min and max, PC2 min and max and PC3 min and max, respectively in 1) frontal view; 2) dorsal view; and 3) lateral view. Exaggerated displacement factor along axes 0.1.

*Supplementary Figure B. 3D plot of shape change vector after a generalized Procrustes analysis (GPA) on ...,