Data from: Morphological and biomechanical disparity of crocodile-line archosaurs following the end-Triassic extinction

Stubbs TL, Pierce SE, Rayfield EJ, Anderson PSL

Date Published: September 11, 2013

DOI: http://dx.doi.org/10.5061/dryad.61s1n

 

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Title Stubbs et al. Morphological analysis - Raw Landmark Data
Downloaded 81 times
Description This is a tps. file containing 2-D digitized landmarks for the mandibles (lower jaws) of 107 Mesozoic crurotarsans, in lateral view. The file describes the landmark coordinates for all 74 landmark points taken on each specimen. Together with the associated NTS. sliders file this is used to compute aligned, Procrustes transformed, coordinates. The file can be read by notepad, PAST and a number of geometric morphometrics software packages, including tps software, MorphoJ, or IMP software.
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Title Stubbs et al. Morphological analysis - Semi-Landmark Data (sliders file)
Downloaded 61 times
Description This simple NTS. file describes which of the 74 landmarks used in this study are sliding (semi-landmarks). The file is required to compute aligned, Procrustes transformed, coordinates; together with the associated raw landmark data file. The file was created in TPSUTIL. To create aligned coordinates both this file and the raw landmark data should be input in TPSRELW using the chord – min d2 sliding method.
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Title Stubbs et al. Morphological analysis - Procrustes Aligned Coordinates
Downloaded 36 times
Description This data file contains the Procrustes transformed aligned 2-D landmark coordinates for 107 Mesozoic crurotarsan mandibles. The file contains taxonomic labels in the first column. The file can be opened in PAST (Palaeontological Statistics). Using the PCA function on all the data will produce a 2-D lateral lower jaw morphospace for Mesozoic crurotarsans.
Download Stubbs et al. Morphological analysis - Pr...es.tps (359.1 Kb)
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Title Stubbs et al. Morphological analysis - PCA axes 1-15
Downloaded 59 times
Description File contains 15 PC scores from the principal component analysis on the Procrustes transformed aligned landmarks. Plotting axes 1 and 2 as an XY plot produces a 2-D lateral mandibular morphospace for Mesozoic crurotarsans. In our main analyses the first 10 axes were used to calculate morphological disparity, together with binary occurrence and groups files using the MDA add-on for MATLAB. Data regarding the stratigraphic occurrences and groupings for each taxon can be found in the electronic supplementary material accompanying our article (Table S1).
Download Stubbs et al. Morphological analysis - PCA....xlsx (29.25 Kb)
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Title Stubbs et al. Biomechanical analysis - Raw biomehanical character data
Downloaded 98 times
Description This file contains the raw data from 14 biomechanical measurements, taken from the mandibles of 107 Mesozoic crurotarsans. To produce a biomechanical morphospace the data should be z-transformed and entered into PAST. Using the PCO (principle coordinates) function and the Gower similarity index will produce a biomechanical mandibular morphospace. Abbreviations for characters: Total mandibular length (TOTL), Quadrate/articular offset (QUADOFF), Relative length of the mandibular symphysis (SYMPH), Relative length of dental row (%DENT), Relative area of the fenestrae (%FEN), Anterior mechanical advantage (AMA), Posterior Mechanical Advantage (PMA), Opening mechanical advantage (OMA), Maximum Second Moment of Area (MAXI), Average Second Moment of Area (AVRI), Max polar moment of inertia (MAXJ), Average polar moment of inertia (AVRJ), Slenderness of the largest tooth (CUSPMAX), The curvature of largest tooth (CURVEMAX). Full descriptions of each character can be found in the electronic supplementary material accompanying the main article.
Download Stubbs et al. Biomechanical analysis - Raw....xlsx (25.96 Kb)
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Title Stubbs et al. Biomechanical analysis - PCO axes 1-15
Downloaded 47 times
Description File contains 15 PC scores from a principal coordinates analysis of the z-transformed biomechanical data, from 107 Mesozoic crurotarsan mandibles. Plotting axes 1 and 2 as an XY plot produces a biomechanical mandibular morphospace. In our main analyses the first 10 axes were used to calculate biomechanical disparity, together with binary occurrence and groups files using the MDA add-on for MATLAB. Data regarding the stratigraphic occurrences and groupings for each taxon can be found in the electronic supplementary material accompanying our article (Table S1).
Download Stubbs et al. Biomechanical analysis - PCO....xlsx (27.75 Kb)
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When using this data, please cite the original publication:

Stubbs TL, Pierce SE, Rayfield EJ, Anderson PSL (2013) Morphological and biomechanical disparity of crocodile-line archosaurs following the end-Triassic extinction. Proceedings of the Royal Society B 280(1770): 20131940. http://dx.doi.org/10.1098/rspb.2013.1940

Additionally, please cite the Dryad data package:

Stubbs TL, Pierce SE, Rayfield EJ, Anderson PSL (2013) Data from: Morphological and biomechanical disparity of crocodile-line archosaurs following the end-Triassic extinction. Dryad Digital Repository. http://dx.doi.org/10.5061/dryad.61s1n
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