Whence the beardogs? Reappraisal of the Middle to Late Eocene ‘Miacis’ from Texas, USA, and the origin of Amphicyonidae (Mammalia, Carnivora)

  title={Whence the beardogs? Reappraisal of the Middle to Late Eocene ‘Miacis’ from Texas, USA, and the origin of Amphicyonidae (Mammalia, Carnivora)},
  author={Susumu Tomiya and Zhijie Jack Tseng},
  journal={Royal Society Open Science},
The Middle to Late Eocene sediments of Texas have yielded a wealth of fossil material that offers a rare window on a diverse and highly endemic mammalian fauna from that time in the southern part of North America. These faunal data are particularly significant because the narrative of mammalian evolution in the Paleogene of North America has traditionally been dominated by taxa that are known from higher latitudes, primarily in the Rocky Mountain and northern Great Plains regions. Here we… Expand
Biochronology and biogeography of Paradaphoenus (Carnivora: Amphicyonidae) within the Great Plains Region of North America
The amphicyonid, or “bear-dog,” Paradaphoenus was a small-bodied, hypercarnivorous carnivoran that lived in North America during the Oligocene. Specimens of Paradaphoenus are rare, in part owing toExpand
The earliest mustelid in North America
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The study of postcranial bones, such as tarsals, allows for a better understanding of the ecology of these animals and deserves more interest in future morphological and phylogenetic studies. Expand
Ammitocyon kainos gen. et sp. nov., a chimerical amphicyonid (Mammalia, Carnivora) from the late Miocene carnivore traps of Cerro de los Batallones (Madrid, Spain)
In the present paper, we describe the craniodental remains of three individuals of an amphicyonid previously determined as Thaumastocyon sp. from the late Miocene (c. 9.1 Ma) pseudokarstic site ofExpand
Description of a new species of Cynodictis Bravard & Pomel, 1850 (Carnivora, Mammalia) from the Quercy Phosphorites with comments on the use of skull morphology for phylogenetics
ABSTRACT Amphicyonidae Trouessart, 1885 are among the oldest known carnivoran groups, with the oldest representatives in Europe belonging to the genus Cynodictis Bravard & Pomel, 1850. This genus,Expand
Climbing Adaptations of an Enigmatic Early Arctoid Carnivoran: the Functional Anatomy of the Forelimb of Amphicynodon leptorhynchus From the Lower Oligocene of the Quercy Phosphorites (France)
This paper provides a detailed description and the functional anatomy of the forelimb of an early Oligocene genet-sized arctoid carnivoran, Amphicynodon leptorhynchus, to infer its probableExpand
The Carnivora (Mammalia) from the middle Miocene locality of Gračanica (Bugojno Basin, Gornji Vakuf, Bosnia and Herzegovina)
The Carnivora (Mammalia) yielded in the coal mine Gračanica in Bosnia and Herzegovina are composed of the caniform families Amphicyonidae ( Amphicyon giganteus ), Ursidae ( Hemicyon goeriachensis ,Expand
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Some of the most extreme sabertooth adaptations are found within the carnivoran subfamily Barbourofelina, the largest group of carnivorous mammals in the world. Expand


Ursidae (Mammalia, Carnivora) from the Late Oligocene of the “Phosphorites du Quercy” (France) and a reappraisal of the genus Cephalogale Geoffroy, 1862
This work reports on karstic fissure fillings from the Quercy (France) which give an exceptional open laboratory for the study of evolution of vertebrates and especially mammals from the Eocene to the Early Miocene, and yields the best sample ever found of a hemicyonine ursid. 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
Earliest Eocene Miacidae (Mammalia: Carnivora) from Northwestern Wyoming
Abstract Fossil carnivorans are described from earliest Eocene localities in the Clarks Fork and southern Bighorn basins of Wyoming. Three new species, Miacis rosei, Uintacyon gingerichi, andExpand
New material and evaluation of the chronostratigraphic position of Daphoenictis tedfordi (Mammalia, Carnivora, Amphicyonidae), a cat-like carnivoran from the latest Eocene of northwestern Nebraska, USA
One of the most enigmatic amphicyonid carnivorans, the cat-like Daphoenictis tedfordi, is now known from 12 cranio-dental specimens from North America. The most recently recovered specimen, a partialExpand
Small Oligocene amphicyonids from North America (Paradaphoenus, Mammalia, Carnivora). American Museum novitates ; no. 3331
Abstract North American amphicyonid carnivorans are important members of the mid-Cenozoic terrestrial carnivore community during the late Eocene to late Miocene (Duchesnean to Clarendonian). SpeciesExpand
Evolution of Large Carnivores During the Mid-Cenozoic of North America: The Temnocyonine Radiation (Mammalia, Amphicyonidae)
The Temnocyoninae (Mammalia, Carnivora) is described and summarized, a subfamily of amphicyonid carnivores of considerable diversity and singular ecomorphology within Cenozoic faunas of North America, which sees the first carnivorans to occupy an ecological niche as large cursorial predators. Expand
Small Oligocene Amphicyonids from North America (Paradaphoenus, Mammalia, Carnivora)
Abstract North American amphicyonid carnivorans are important members of the mid-Cenozoic terrestrial carnivore community during the late Eocene to late Miocene (Duchesnean to Clarendonian). SpeciesExpand
New Carnivoraforms from the Latest Paleocene of Europe and Their Bearing on the Origin and Radiation of Carnivoraformes (Carnivoramorpha, Mammalia)
The discovery of the earliest European carnivoraforms, based on two new taxa from the latest Paleocene of France and Romania, favor the hypothesis of a dispersal of these two genera from Europe to North America during the Paleocene-Eocene Thermal Maximum. Expand
A New Basal Caniform (Mammalia: Carnivora) from the Middle Eocene of North America and Remarks on the Phylogeny of Early Carnivorans
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Middle Eocene Carnivoramorpha of the Uinta Basin, Utah
ABSTRACT The middle Eocene of North American was an important time in carnivoramorphan evolution, because it is when the order showed increases in diversity taxonomically and ecomorphologically. WeExpand