DOI: 10.5061/dryad.4d75c
title: Data from: Eutherian morphological disparity across the end-Cretaceous mass extinction

description: In the aftermaths of mass extinction events, during radiations of clades,
 and in several other evolutionary scenarios, there is often a decoupling
 of taxonomic diversity and morphological disparity. The placental mammal
 radiation after the end-Cretaceous mass extinction is one of the
 archetypal adaptive radiations, but the change in morphological disparity
 of the entire skeleton has never been quantified across this important
 boundary. We reconstruct ancestral morphologies of 680 discrete
 morphological characters onto dated phylogenies of 177 mostly Cretaceous
 and Palaeogene eutherians (placental mammals and their stem relatives).
 Using a new approach to incorporate morphologies representing ghost
 lineages, we assess three measures of morphological disparity (sum of
 ranges, sum of variances and mean pairwise dissimilarity) across
 stage-level time bins within the Cretaceous and Palaeogene. We find that
 the range-based metric suggests that eutherian disparity increased
 immediately after the end-Cretaceous mass extinction, while both
 variance-based metrics declined from the Campanian to the Maastrichtian,
 but showed no change in disparity from the Maastrichtian to the Puercan –
 the first North American Land Mammal Age of the Paleocene. Increases in
 variance-based metrics lag behind the range-based metric and per-lineage
 accumulation rate, suggesting that the response of mammals to the
 Cretaceous–Palaeogene event was characterized by an early radiation that
 increased overall morphospace occupation, followed later by specialization
 that resulted in increased dissimilarity.
description: Supplementary File 8 - R
 CodeR
 code, requiring ape, geiger, and Claddis packages, used to run the
 analysis.Supplementary File 9
 (Continuous PCO Changes)Morphospaces of
 Principal Coordinates 1 and 2, for morphologies within each time bin and
 optimal topologies derived from the combined discrete-continuous
 phylogenetic analyses. Open circles represent basal eutherians with
 respect to the crown group, open squares more crownward non-placental
 eutherians, and black squares crown placentals. Abbreviations are as
 follows: CM = Continuous, minimum constraint; CF = Continuous, full
 constraint; CP = Continuous, Purgatorius constraint.Supplementary File 4 CF
 cal3 datedTrees deriving from the
 continuous data and full constraint, dated using cal3.Supplementary File 5 CP
 cal3 datedTrees deriving from the
 continuous data and Purgatorius constraint, dated using
 cal3.Supplementary File 6 CM
 cal3 datedTrees deriving from the
 continuous matrix with minimum constraint, dated using
 cal3.Supplementary File 1 DF
 cal3 datedTrees deriving from the
 discrete data and full constraint, dated using cal3.Supplementary File 2 DP
 cal3 datedTrees derived from the
 discrete data and Purgatorius constraint, dated using
 cal3.Supplementary File 3 DM
 cal3 datedTrees deriving from
 discrete data and minimum constraints, dated using
 cal3.Supplementary File 7
 Discrete MatrixDiscrete character-taxon
 matrix used for ancestral reconstruction and generation of the tree
 topologies, in nexus format.