Data and code for: Diversity through space and time in the Upper Jurassic Morrison Formation, western USA

Understanding how biodiversity has changed through time and space is a central aim of paleobiology. To elucidate accurate biodiversity patterns in deep time, regional case studies, where sampling biases can be minimized, are needed. The Upper Jurassic Morrison Formation of the western USA crops out over 1.2 million km2 and covers 12 degrees of latitude. It was deposited over a ~9-million-year time period and was home to some of the most iconic dinosaurs. Utilizing a new, high-resolution chronostratigraphic framework for the formation, tetrapod occurrences from the Paleobiology Database were temporally and spatially mapped to examine patterns of diversity change through time and space, and the geographic ranges of taxa were examined to shed light on niche partitioning. Latitudinally, diversity was found to peak in the center of the basin, perhaps due to the availability of water resources. Diversity increased over time in the Morrison Formation, and there is no evidence to indicate a dec..., All vertebrate occurrences in the Morrison Formation were downloaded from the Paleobiology Database (PBDB; paleobiodb.org; accessed 23/12/2022). The data were visually inspected and occurrences related to eggshells or tracks were removed, leaving only those pertaining to body fossils. This resulted in 1397 occurrences. Taxonomy was cleansed following the recent literature. Occurrences were manually attributed to systems tracts described in Maidment & Muxworthy (2019) based on stratigraphic logs or descriptions in the literature for each locality and supplemented with first-hand observations of a number of quarries. A full list of quarries, systems tracts, and references for the stratigraphic location are provided in the spreadsheet “Quarry data.csv” in the Online Supplementary Material available with the manuscript. As not all references provided stratigraphic logs or descriptions, it was not always possible to attribute quarries to stratigraphic locations, but 1144 occurrences (82%..., , # Data and code for: Diversity through space and time in the Upper Jurassic Morrison Formation, western USA

[https://doi.org/10.5061/dryad.6m905qg77](https://doi.org/10.5061/dryad.6m905qg77)

This dataset provides raw data and code for all analyses carried out in the above paper. There are eight .xlsx files that contain raw data, and four scripts that implement the analyses carried out in R.

The R script 'Diversity_analysis_code.R' plots raw generic occurrences, tetrapod-bearing collections and abundance against latitude and systems tract, and carries out correlation tests to examine whether these are statistically correlated with each other. It uses the data files \"Genera_with_latitude.xlsx\", \"Collections with time.xlsx\", \"Corrected abundance with time.xlsx\", \"Collections_with_latitude.xlsx\" and \"Corrected abundance with latitude.xlsx\".

The R script 'iNext_code.R' sample standardizes the raw generic occurrence data for each degree of latitude and for each systems tract using the iNE...