Raw morphometric measurements and gyrification indices of the dorsal dentate gyrus in Octodon lunatus and Octodon degus

Abstract

This Excel dataset contains raw morphometric measurements and derived folding indices of the dorsal dentate gyrus in wild individuals of Octodon lunatus and Octodon degus. The resource includes: (1) contour length measurements (µm) from serial histological sections of inner and outer dentate gyrus boundaries in both hemispheres, and (2) calculated gyrification indices (dorsal and ventral, left and right hemispheres), together with individual-level biological and social variables (sex, population, body mass, brain size, and social group size). The dataset was generated within a research project aimed at evaluating ecological and social drivers of hippocampal folding and hemispheric asymmetry in wild Octodon species. Raw contour measurements were used to compute folding indices reported in the associated peer-reviewed publication.