Nocturnality in synapsids predates the origin of mammals by over 100 million years

@article{Angielczyk2014NocturnalityIS,
  title={Nocturnality in synapsids predates the origin of mammals by over 100 million years},
  author={Kenneth D. Angielczyk and Lars Schmitz},
  journal={Proceedings of the Royal Society B: Biological Sciences},
  year={2014},
  volume={281}
}
  • K. AngielczykL. Schmitz
  • Published 22 October 2014
  • Biology, Environmental Science, Geography
  • Proceedings of the Royal Society B: Biological Sciences
Nocturnality is widespread among extant mammals and often considered the ancestral behavioural pattern for all mammals. However, mammals are nested within a larger clade, Synapsida, and non-mammalian synapsids comprise a rich phylogenetic, morphological and ecological diversity. Even though non-mammalian synapsids potentially could elucidate the early evolution of diel activity patterns and enrich the understanding of synapsid palaeobiology, data on their diel activity are currently unavailable… 

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References

SHOWING 1-10 OF 203 REFERENCES

Nocturnality in Dinosaurs Inferred from Scleral Ring and Orbit Morphology

It is shown that the eyes of Mesozoic archosaurs were adapted to all major types of diel activity (that is, nocturnal, diurnal, and cathemeral) and provide concrete evidence of temporal niche partitioning in the Mesozoics.

The Phylogenetic Relationships of Eucynodontia (Amniota: Synapsida)

  • Jun LiuP. Olsen
  • Biology, Environmental Science
    Journal of Mammalian Evolution
  • 2010
A cladistic analysis, based on 145 characters and 31 species, and intergrating most prior works, confirmed the monophyly of Eucynodontia, although the results slightly differ from those of previous analyses with respect to the composition of both Cynognathia and ProbainognathIA.

Ghost lineages and “mammalness”: assessing the temporal pattern of character acquisition in the Synapsida

Abstract The origin of mammals has been characterized as a gradual process, a claim based primarily on a well-preserved series of extinct nonmammalian synapsids (“mammal-like reptiles”) that span

Interrelationships of basal synapsids: cranial and postcranial morphological partitions suggest different topologies

A new phylogenetic dataset comprising 45 taxa (plus four outgroups and four therapsids) and 239 characters reveals considerable uncertainty in the relationships of higher clades of basal synapsids, and suggests well-supported phylogenetic placements for several taxa of historically uncertain affinities.

DINOSAUR PHYSIOLOGY AND THE ORIGIN OF MAMMALS

  • Robert T. Barker
  • Environmental Science, Geography
    Evolution; international journal of organic evolution
  • 1971
The fossil evidence strongly suggests that no small dinosaurs ever existed in either Jurassic or Cretaceous, and the most convincing proof of the lack of truly small dinosaur species is their absence in the carefully studied microvertebrate concentrates.

The nocturnal bottleneck and the evolution of activity patterns in mammals

The ecological plausibility that the activity patterns of (early) eutherian mammals were restricted to the night is reviewed, based on arguments relating to endothermia, energy balance, foraging and predation, taking into account recent palaeontological information.

A Mesozoic gliding mammal from northeastern China

A new Mesozoic mammal from Inner Mongolia, China, is reported that represents a previously unknown group characterized by a highly specialized insectivorous dentition and a sizable patagium (flying membrane) for gliding flight.

Eothyris and Oedaleops: Do These Early Permian Synapsids from Texas and New Mexico form a Clade?

Although they appear relatively late in synapsid evolution, both eothyridids are significantly older than all other caseasaurs, forcing the establishment of a long unrecorded lineage for caseids.

Global Taxonomic Diversity of Anomodonts (Tetrapoda, Therapsida) and the Terrestrial Rock Record Across the Permian-Triassic Boundary

Investigation of diversity patterns in Anomodontia, an extinct group of therapsid synapsids (‘mammal-like reptiles’), through time and in particular across this event finds it remains unclear whether the Middle Triassic extinction represents a gradual or abrupt event that is unique to anommodonts or more common among terrestrial tetrapods.

SIMPLIFICATION AS A TREND IN SYNAPSID CRANIAL EVOLUTION

  • C. Sidor
  • Environmental Science
    Evolution; international journal of organic evolution
  • 2001
The results of a new skull simplification metric (SSM), which is defined as a function of the number of distinct elements, show that pronounced simplification is evident on both temporal and phylogenetic scales.
...