Eutherian morphological disparity across the end‐Cretaceous mass extinction

@article{Halliday2016EutherianMD,
  title={Eutherian morphological disparity across the end‐Cretaceous mass extinction},
  author={Thomas J. D. Halliday and Anjali Goswami},
  journal={Biological Journal of The Linnean Society},
  year={2016},
  volume={118},
  pages={152-168}
}
© 2015 The Linnean Society of London. 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… 

Figures from this paper

Eutherians experienced elevated evolutionary rates in the immediate aftermath of the Cretaceous–Palaeogene mass extinction
TLDR
It is shown that Placentalia likely originated in the Late Cretaceous, but that most intraordinal diversification occurred during the earliest Palaeocene, supporting the view that an evolutionary radiation occurred as placental lineages invaded new ecological niches during the EarlyPalaeocene.
Therian mammals experience an ecomorphological radiation during the Late Cretaceous and selective extinction at the K–Pg boundary
TLDR
The conflicting diversity and disparity patterns suggest that earliest Palaeocene extinction survivors, especially eutherian dietary generalists, underwent rapid taxonomic diversification without considerable morphological diversification.
Patterns of mammalian jaw ecomorphological disparity during the Mesozoic/Cenozoic transition
TLDR
Total mammal disparity exceeded its Mesozoic maximum for the first time during the Eocene, when therian mammals began exploring previously unoccupied regions of function space, and probably reflects the duration of evolutionary recovery after the K/Pg mass extinction event.
Completeness of the eutherian mammal fossil record and implications for reconstructing mammal evolution through the Cretaceous/Paleogene mass extinction
TLDR
The completeness of the eutherian fossil record through geological time is evaluated and supports the “explosivemodel” of early placental evolution, whereby placentalmammals originated around the time of the K/Pg boundary and diversified soon after.
Multifaceted disparity approach reveals dinosaur herbivory flourished before the end-Cretaceous mass extinction
Abstract Understanding temporal patterns in biodiversity is an enduring question in paleontology. Compared with studies of taxonomic diversity, long-term perspectives on ecological diversity are
Diversification dynamics of mammalian clades during the K–Pg mass extinction
TLDR
The results show that these clades responded in dramatically contrasting ways to the K–Pg event, indicating that the effects of geological episodes on diversity are context dependent and that mass extinctions can affect the diversification of clades by independently altering the extinction regime, the origination regime or both.
Phylogeny, disparity and mass extinction response in the trilobite order Harpetida
The trilobite order Harpetida has long been easily recognized but many unanswered evolutionary questions about the group remain. This work explores the phylogenetic relationships within Harpetida and
Disparity vs. diversity in Stegosauria (Dinosauria, Ornithischia): cranial and post-cranial sub-dataset provide different signals
  • M. Romano
  • Geography, Environmental Science
  • 2019
TLDR
The first detailed analysis of the relationship between disparity and diversity through the evolutionary history of the Stegosauria is presented, finding a decoupling of the tempo and mode of evolution of the cranium and postcranium in stegosaurs.
Rapid morphological evolution in placental mammals post-dates the origin of the crown group
TLDR
It is shown that, independent of divergence dates, morphological rates of evolution were slow relative to molecular evolution during the initial divergence of Placentalia, but substantially increased during the origination of the extant orders, supporting a Late Cretaceous origin of crown placentals with an ordinal-level adaptive radiation in the early Paleocene.
Cranial disparity versus diversity in sabertoothed felids: a case of late morphospace saturation
TLDR
The first diversity (number of taxa) versus disparity (explored morphospace) comparison of sabertoothed felids performed on craniomandibular and dental characters indicates that in machairodont felids real morphospace stabilization is never achieved until the Pleistocene.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 94 REFERENCES
Dinosaur morphological diversity and the end-Cretaceous extinction.
TLDR
There was no universal biodiversity trend and the intensively studied North American record may reveal primarily local patterns, but at least some dinosaur groups did endure long-term declines in morphological variability before their extinction.
Triassic–Jurassic mass extinction as trigger for the Mesozoic radiation of crocodylomorphs
TLDR
A significant shift in morphospace occupation between Late Triassic and Early Jurassic taxa is recognized, suggesting that the TJ extinction of many pseudosuchian lineages was followed by a major and geologically rapid adaptive radiation of crocodylomorphs.
Adaptive radiation of multituberculate mammals before the extinction of dinosaurs
TLDR
It is shown that in arguably the most evolutionarily successful clade of Mesozoic mammals, the Multituberculata, an adaptive radiation began at least 20 million years before the extinction of non-avian dinosaurs and continued across the Cretaceous–Paleogene boundary.
Graptoloid diversity and disparity became decoupled during the Ordovician mass extinction
TLDR
It is found that a general model of morphological selectivity has a low probability of producing the observed pattern of taxonomic selectivity and that the early recovery of graptoloid recovery is unexpectedly characterized by relatively low morphological disparity and innovation, despite also being an interval of elevated speciation.
Decoupling of morphological disparity and taxic diversity during the adaptive radiation of anomodont therapsids
TLDR
The results highlight three main aspects of adaptive radiations: diversity and disparity are generally decoupled; models of radiations following mass extinctions may differ from those triggered by other causes (e.g. trait acquisition); and the bottleneck caused by a mass extinction means that a clade can emerge lacking its original potential for generating morphological variety.
Mammal disparity decreases during the Cretaceous angiosperm radiation
TLDR
It is concluded that during the mid-Cretaceous, the period of rapid angiosperm radiation, mammals experienced both a decrease in morphological disparity and a functional shift in dietary morphology that were probably related to changing ecosystems.
Resolving the relationships of Paleocene placental mammals
TLDR
The largest cladistic analysis of Paleocene placentals to date is presented, from a data matrix including 177 taxa (130 of which are Palaeogene) and 680 morphological characters, and supports an Atlantogenata–Boreoeutheria split at the root of crown Placentalia, the presence of phenacodontids as closest relatives of Perissodactyla, and the validity of Euungulata.
Evidence for a Mid-Jurassic Adaptive Radiation in Mammals
Explosive morphological diversification of spiny-finned teleost fishes in the aftermath of the end-Cretaceous extinction
  • M. Friedman
  • Environmental Science, Geography
    Proceedings of the Royal Society B: Biological Sciences
  • 2010
TLDR
The trajectory of morphological diversification in this major radiation from its first appearance in the Late Cretaceous to the Miocene is reconstructed using a geometric morphometric database comprising more than 600 extinct species known from complete body fossils to suggest that multiple factors contributed to the prolific anatomical radiation of acanthomorphs.
Morphological disparity in Ordovician-Devonian crinoids and the early saturation of morphological space
TLDR
Comparison with generic richness reveals that the full range of form was essentially attained by the early part of the Caradocian, long before the time of maximal taxonomic diversity.
...
1
2
3
4
5
...