Body size divergence in the Plestiodon skiltonianus group

We provide the R code and morphological measurements used to compare body size divergence in different parts of the range of a monophyletic group of scincid lizards (Plestiodon skiltonianus species group) in western North America. Behavioral experiments have shown that successful mating among members of the group occurs more than 50% of the time if the body size difference of a male-female pair lies within 10 mm of an optimal threshold but quickly falls to ~5% once it reaches 15 mm. Beyond 15 mm, individuals tend to avoid any interaction at all. We used this information to test whether a greater proportion of heterotypic pairs drawn from inside two introgression zones fall within the ±10 mm optimum compared to pairs drawn from outside those areas. To test this hypothesis, we used rangewide specimen data from Richmond (2005) to calculate the body size difference (measured as snout-vent-length [SVL] in millimeters) of 500 randomly sampled pairs in each of four groups: (1) heterotypic pair..., We obtained the morphological data from whole skink specimens and organized it in an excel spreadsheet, which we then saved as a .cvs vile for analysis in R. , , # Body size divergence in the Plestiodon skiltonianus group

[https://doi.org/10.5061/dryad.kd51c5bhz](https://doi.org/10.5061/dryad.kd51c5bhz)

## Description of the data and file structure

These data consist of body size measurements for whole skink specimens obtained from across the range of the *Plestiodon skiltonianus* group. 

### Files and variables

#### File: EVO\_24\_0432\_introg\_morphology.xlsx

**Description:** Body size data from whole skink specimens

##### Variables

* number = specimen ID number (institution code + number, or field tag no.)
* ecomorph (0 = small-bodied; 1= large-bodied)
* clade = mitochondrial clade identity
* county = county or province
* sex = (0 = male; 1 = female)
* svl = snout-to-vent length in millimeters (mm)
* logsvl = log tranformed snout-to-vent length (mm)
* introgr = (0 = outside introgession zone; 1 = within introgression zone)

## Code/software

This file contain the R code, with markdown, to perform the permutation tests used to compare ...,