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Has the Earth’s sixth mass extinction already arrived?
Differences between fossil and modern data and the addition of recently available palaeontological information influence understanding of the current extinction crisis, and results confirm that current extinction rates are higher than would be expected from the fossil record. Expand
The educational values of the University of California Museum of Paleontology
The University of California Museum of Paleontology (UCMP) maintains the largest university museum fossil collection in the world and promotes research and education at its home, University ofExpand
Whence the beardogs? Reappraisal of the Middle to Late Eocene ‘Miacis’ from Texas, USA, and the origin of Amphicyonidae (Mammalia, Carnivora)
Re-examination of previously described specimens and their inclusion in a cladistic analysis revealed the two peculiar carnivoraforms from the Chambers Tuff of Trans-Pecos, Texas to be diminutive basal amphicyonids; as such, they are assigned to new genera Gustafsonia and Angelarctocyon, respectively. Expand
A New Basal Caniform (Mammalia: Carnivora) from the Middle Eocene of North America and Remarks on the Phylogeny of Early Carnivorans
Lycophocyon hutchisoni illuminates the morphological evolution of early caniforms leading to the origin of crown-group canoids and suggests that loss of the upper third molars and development of well-ossified entotympanics that are firmly fused to the basicranium are not associated with theorigin of the Carnivora as traditionally thought, but instead occurred independently in the Caniformia and the Feliformia. Expand
Body Size and Extinction Risk in Terrestrial Mammals Above the Species Level
  • Susumu Tomiya
  • Biology, Medicine
  • The American Naturalist
  • 9 October 2013
The North American fossil record of 276 terrestrial genera was examined to uncover the relationship between body size and extinction probability above the species level, and revealed no correlation between sampling-adjusted durations and body masses ranging 7 orders of magnitude. Expand
New carnivoraforms (Mammalia) from the middle Eocene of California, USA, and comments on the taxonomic status of 'Miacis' gracilis
The middle Eocene constitutes an important period for understanding the early evolution of carnivoraforms and the origin of crown-group carnivorans. Here I describe two new genera of carnivoraformsExpand
Postcranial diversity and recent ecomorphic impoverishment of North American gray wolves
It is found that the late-Pleistocene gray wolves were characterized by short-leggedness on both sides of the Cordilleran–Laurentide ice sheets, and that this trait survived well into the Holocene despite the collapse of Pleistocene megafauna and disappearance of the ‘Beringian wolf' from Alaska. Expand
Utilizing inquiry-driven science outreach to curate Natural Trap Cave fossils and inspire the pursuit of STEM careers
Despite the rising emphasis on STEM (science, technology, engineering, and mathematics) education in the last two decades, the United States has seen little change in student performance, based onExpand
A report on late Quaternary vertebrate fossil assemblages from the eastern San Francisco Bay region, California
Here we report on vertebrate fossil assemblages from two late Quaternary localities in the eastern San Francisco Bay region, Pacheco 1 and Pacheco 2. At least six species of extinct mammalianExpand
Ecological Aspects of the Diversity Dynamics of North American Fossil Mammals
The dissertation research presented herein addresses two questions on possible ecological drivers of mammalian diversity dynamics at macroevolutionary time scales by describing a carnivoramorphan that sheds a new light on the origin and early evolution of crown-group carnivorans and investigating the relationship between body size and extinction probability as measured by durations of genera in the fossil record. Expand