Decoupled diversity and disparity after faunistic turnover in caviomorph rodents

Caviomorph rodents diversified widely in the Americas. Within this group, the sister clades Octodontoidea (spiny rats and allies) and Chinchilloidea (chinchillas and allies) illustrate strikingly imbalanced evolution, with 195 extant species in the former and only six in the latter. Fossil evidence, however, documents greater past diversity and disparity in Chinchilloidea, including the largest known rodents. Here, we integrate data from extant and extinct species to investigate how evolutionary dynamics shaped these contrasting trajectories. Using a phylogenetic framework, we reconstructed patterns of body mass and craniodental evolution. The ancestral body mass was small, but Chinchilloidea expanded into a broader size range, showing significantly higher rates of body mass evolution than Octodontoidea. Subsequent Neogene and Quaternary extinctions erased much of this variation, reversing a ~30-million-year trend of greater body mass disparity. Craniodental disparity, however, followed..., , <br />

# Data from: Decoupled diversity and disparity after faunistic turnover in caviomorph rodents

Dataset DOI: [10.5061/dryad.73n5tb3bc](https://doi.org/10.5061/dryad.73n5tb3bc)

## Description of the data and file structure

This repository contains the datasets and scripts associated with the study of body mass, cranial morphology, phylogeny, diversity, and disparity in Chinchilloidea and Octodontoidea. Each dataset corresponds to the analyses presented in the manuscript and supplementary materials.

## Files and variables

#### File: Data_from_Carrillo_et_al_Caviomorphs.zip

The folder structure of Data_from_Carrillo_etal_Caviomorphs.zip is as follows:

Data_from_Carrillo_etal_Caviomorphs.zip\
\- **Dataset S1**.xlsx\
\- **Dataset S2** Traits_table.xlsx\
\- **Dataset S3** - Phylogenetic analyses data and code\
\> matrix_mapker.py\
\> raxml analyses\
\> Root age calibration\
\> supermatrix_filt_clean_mt-nuc_wdummy_20221003.nex\
\> supermatrix_moleculardata_only.nex\
\> Time-calibr...,