Traces of phylogeny and ecology in hippocampal neuron numbers

The datasets contain hippocampal cell numbers and ecological variables used to investigate the evolution of the hippocampus and the ecological factors that are drivers of natural selection in the phylogenetic development of the hippocampus. The dataset on hippocampal cell numbers contains additional species, which due to specimen n < 3 were not included in the analysis. In addition, the dataset on hippocampal cell numbers contains all sampling parameters, CE estimates and all other information on the specimens available to us (e.g., brain weights, body weights, sex). Interactive graphs permit species identification in 3D representations of phylogenetic principal components analyses (principal components 1 - 3) and species identification and exploration in the hippocampal morphospace. The R script that was used to analyse the data is provided.
, The methods to collect the data are decribed in detail in the publication that this dataset accompanies. All neuron number estimates were generated using the Optical Fractionator, a design-based stereological method., , # Traces of evolution and Ecology in hippocampal cell numbers

[https://doi.org/10.5061/dryad.kd51c5bht](https://doi.org/10.5061/dryad.kd51c5bht)

## Description of the data and file structure

The hippocampal cell number data were generated to investigate the evolution of the hippocampal circuitry and the impact of ecological factor as drivers of natural selection during the phylogenetic development of the hippocampus.

### Files and variables

#### File: EcoEvoHippo_Ecological_Factors.xlsx

**Description:** This file contains the PanTHERIA ecological data used in the publication that this data accompanies. The sheet \"data\" contains the unformated variable values that were used for analysis. The data was extensively vetted. The sheet \"data_annotated\" specifies which of the variable values from PanTHERIA were corrected and which variable values were estimated because they were missing in PanTHERIA. Additional information on the variables and the references used to either correct PanTHE...,