Trionychid Specimen Data and Topographic Metrics

Data used in the paper "Quantifying shell patterning helps identify species of Trionychidae". Includes information on the museum specimens used in the study, metadata on the scans of the specimens, data on the origin locations of the artificial (clipped out) "fragments", and values of three dental topographic metrics for each scan.

Columns are as follows:

Index of rows

Files: Full file name of each scan as it appears in the directory

Species: Turtle species identify of the scan (Amyda cartilaginea, Apalone ferox, Apalone spinifera)

CostalCarapaceLength: Straight line carapace length

TotalSLCarapaceLength: Straight line midline distance from the first neural to the posterior end of the carapace

SpecimenName: Catalog number of the specimen as determined by the Florida Museum of Natural History, Museum of Florida

AnteriorDistance: Straight line distance along the CostalCarapaceLength midline that ends at the perpendicular line that intersects the center of the artificial shell fragment

LateralDistance: Straight line distance from the midline to the center of the artificial shell fragment

Side: Side of the body the fragment originated from (left or right)

Costal: Costal the fragment originated from (1-6, from anterior to posterior)

Excluded: True/False, if the scan was excluded due to artifacts

Notes: Additional comments on why the scan was excluded or left in the dataset

DNE: Dirichlet Normal Energy as computed by the molaR package

RFI: Relief Index as computed by the molaR package

OPCR: Orientation Patch Count as computed by the molaR package

Slope: Slope as computed by the molaR package (not used in analyses)

alpha: Value used in RFI calculation. Set based on initial tests

Modified.in.v2: True/False, if the scan was manually modified to remove scanning artifacts (such as disconnected polygons) for use in topographic analyses

DNE.std: DNE value after square root normalization and standardization

RFI.std: RFI value after square root normalization and standardization

OPCR.std: OPCR value after standardization (normalization not needed)