J. Lillegraven

Publications65
h-index24
Citations2,368
Highly Influential Citations225
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Latest Cretaceous mammals of upper part of Edmonton Formation of Alberta, Canada, and review of marsupial-placental dichotomy in mammalian evolution
7 Zoogeographic considerations of INTRODUCTION 8 Edmonton Formation multituberculates .. 31 Acknowledgments 8 Subclass Theria—Infraclass PART I.—FOSSIL MAMMALS OF UPPER PART Metatheria—Order…
3. Paleocene Biochronology: The Puercan Through Clarkforkian Land Mammal Ages
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Fossil mammals from the "Mesaverde" Formation (late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming : with definitions of late Cretaceous North American land-mammal "ages".
TLDR
Comparisons suggest that the Judithian mammalian fauna of what was then coastal parts of the western interior was essentially homogeneous geographically, at least from southern Alberta to central Wyoming, and Judithian mammal faunas of the Rocky Mountains must be younger in age.
Cranio-mandibular anatomy of Haldanodon exspectatus (Docodonta; Mammalia) from the late Jurassic of Portugal and its implications to the evolution of mammalian characters
Skull morphology of Lambdopsalis bulla (Mammalia, Multituberculata) and its implications to mammalian evolution
TLDR
The skull morphology of Lambdopsalis shows phylogenetic unity with taeniolabidids, and invalidates the hypothesis of fundamental nontherian/therian dichotomy, and cranial characters coupled with dental features document monophyly for nonharamiyid multituberculates.
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2. Mammalian Biochronology of the Latest Cretaceous
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A new important record of earliest Cenozoic mammalian history: Eutheria and paleogeographic/biostratigraphic summaries
We provide systematic description and discussion for each of 47 species of eutherian (“placental”) mammals from the type Ferris Formation of the western Hanna Basin, south-central Wyoming. All…
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BIOLOGICAL CONSIDERATIONS OF THE MARSUPIAL‐PLACENTAL DICHOTOMY
  • J. Lillegraven
  • Medicine
    Evolution; international journal of organic…
  • 1 December 1975
TLDR
The present work is a continuation with emphasis upon reproductive aspects of the problem of the marsupial-placental dichotomy in mamma lian evolution, and focuses on the condition of the newborn in the immediate common ancestor to marsupials and placentals.
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A new important record of earliest Cenozoic mammalian history :geologic setting, Multituberculata, and Peradectia
The type Ferris Formation of south-central Wyoming is thick, comparatively undeformed, and relatively fossiliferous. We documented more than 100 vertebrate-bearing, stratigraphically superposed…
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Survival in the first hours of the Cenozoic
For several hours following the Chicxulub impact, the entire Earth was bathed with intense infrared radiation from ballistically reentering ejecta. The global heat pulse would have killed unsheltered…
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