Freshwater fish and the Cretaceous/Palaeogene boundary: A critical assessment of survivorship patterns

Mass extinctions are major influences on both the phylogenetic structure of the modern biota and our ability to reconstruct broad-based patterns of evolutionary history. The most recent mass extinction is also the most famous—that which implicates a bolide impact in defining the Cretaceous/Palaeogene boundary (K/Pg). Although the biotic effects of this event receive intensive scrutiny, certain ecologically important and diverse groups remain woefully understudied. One such group is the freshwater ray-finned fishes (Actinopterygii). These fish represent 25% of modern vertebrate diversity, yet the isolated and fragmentary nature of their K/Pg fossil record limits our understanding of their diversity dynamics across this event. Here, we address this problem using diversification analysis of molecular-based phylogenies alongside a morphotype analysis of fossils recovered from a unique site in the Denver Basin of western North America that provides unprecedented K/Pg resolution. Our results ..., , , FRESHWATER FISH AND THE CRETACEOUS/PALAEOGENE BOUNDARY: A CRITICAL ASSESSMENT OF SURVIVORSHIP PATTERNS

This study analyzed diversity dynamics of freshwater actinopterygians across the K/Pg boundary using diversification rate analyses in extant phylogenies and morphotype analysis of fossil specimens.

Data are in two folders. Data.zip includes the majority of data from this study. Data_Acanthomorpha.zip includes only the BAMM data for the Acanthomorpha analysis.

In Data.zip, data are divided into BAMM analyses and morphotype analyses. All code (.rmd, .r, and .py) includes comments that describe the purpose and action of each section.

 

**BAMM folder**

*speciesnamechanges.csv*

Spreadsheet with all name changes made to the original Rabosky et al. (2018) trees

*bamm runs*

For all BAMM analyses, each analyzed clade has a folder further subdivided by analyses that excluded taxa (if applicable) and then by expected number of shifts. The .R script in each clade folder includes code to r...