Contrasting phylogeographic patterns of sandy vs. rocky sympatric sister species of supralittoral Tylos isopods in Chile

Sister taxa that have diverged and persisted in sympatry have likely been exposed to the same general environmental changes throughout their evolutionary history and may thus exhibit similar phylogeographies. Here we compare the phylogeographic patterns of two sister species of isopods (genus Tylos) that have broadly overlapping distributions but distinct habitat preferences in the supralittoral zone of Chile. The dynamic geoclimatic history of this region during the Quaternary has been implicated in shaping the evolutionary histories of other coastal taxa. Tylos spinulosus is found in sandy beaches at latitudes ~27–30°S, whereas Tylos chilensis has been found in rocky shores at ~27–33°S and at ~39–42°S. We sampled both species across their ranges (collectively from 20 localities) and obtained sequences from at least one mitochondrial gene for 95 T. chilensis and 41 T. spinulosus. We used phylogenetics and population genetics methods to analyze four single-gene and one concatenated data..., , # Contrasting phylogeographic patterns of sandy vs. rocky sympatric sister species of supralittoral Tylos isopods in Chile

Dataset DOI: [10.5061/dryad.8kprr4xzr](10.5061/dryad.8kprr4xzr)

## Description of the data and file structure

### 1. SupportingDatasetS1.zip

contains the files used to generate the haplotype networks for *Tylos chilensis* and *Tylos spinulosus* in the program PopArt. Files/folders included:

a. chilensis_haplotype_network folder contains:

* Tylos_Chile_12S_90taxa_chilensis_for_popart.nex input file for PopArt: *Tylos chilensis* 12S rDNA alignment file in nexus format including the “traits” block where individuals are assigned to populations
* ylos_Chile_12S_90taxa_chilensis_for_popartMJN.nex output file for PopArt for the preceding file.

b. Spinulosus_haplotype_network folder contains:

* Tylos_Chile_12S_spinulosus_for_DNAsp_39tax.nex input file for PopArt: *Tylos spinulosus* 12S rDNA alignment file in nexus format including the “traits” block where individual...,