Multifaceted impacts of an innovation on dental diversity in an adaptive radiation of cichlid fishes

Evolutionary innovations bring species into new ecological zones by opening ecological opportunity. However, innovations can have varied effects on morphology, which is determined by both intrinsic properties of the innovation and extrinsic properties of the adaptive zone. Here, we show that the evolution of complex teeth with multiple cusps, a vertebrate innovation, has mixed effects on the trajectory of dental evolution in an adaptive radiation of cichlid fishes. Complex teeth first evolved outside Lake Tanganyika and facilitated a secondary incursion of riverine lineages into the lake through herbivorous niches. Complex dentitions are more restricted and segregate along multiple axes of dental diversity. This dental novelty generated by the evolution of complex teeth was likely spurred by adaptive evolution pulling traits towards distinct optima. By accelerating the diversification of tooth cusps, complex teeth unlocked a new axis of dental diversity, leading to diversification withi..., , # Data from: Multifaceted impacts of an innovation on dental diversity in an adaptive radiation of cichlid fishes

Dataset DOI: [10.5061/dryad.wstqjq30j](https://doi.org/10.5061/dryad.wstqjq30j)

## Description of the data and file structure

The data files contain measurements of dental traits (Tooth_Trait_Data_CLEAN.csv), linear measurements of teeth (Tooth_Shape_Data_Linear_CLEAN.csv) and geometric morphometric outlines of tooth cusps (Tooth_Cusp_Shapes_morpho.TPS) for 150 species of Lake Tanganyika cichlid fishes. The time calibrated phylogeny (in NEXUS format; pruned_tree.nex) used for all phylogenetic comparative analyses is included. 

Also included are RevBayes ([https://revbayes.github.io/](https://revbayes.github.io/)) scripts, together with the associated input data (.nex data files) to replicate the analyses in the associated manuscript. 

### Files and variables

#### File: Tooth_Cusp_Shapes_morpho.TPS

**Description:** .TPS file of tooth cusp shape outlines for 150 speci...,