Miacidae

Miacidae
Temporal range: early Paleocene to late Eocene
skull of Miacis parvivorus
skeleton of Vulpavus ovatus
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Clade: Carnivoraformes
Family: Miacidae
Cope, 1880
Type genus
Miacis
Cope, 1872
Genera
Synonyms
list of synonyms:
  • Cercoleptoidei (Matthew, 1909)
  • Cynoidei (Matthew, 1909)
  • Eucreodi (Matthew, 1909)
  • Eucreodontia (Simionescu, 1928)
  • Miacida (Haeckel, 1895)
  • Miacinae (Trouessart, 1885)
  • Miacini (Kalandadze & Rautian, 1992)
  • Miacoidae (Teilhard, 1915)
  • Miacoidea (Simpson, 1931)
  • Palaeocarnivora (Pavlova, 1927)
  • Quercygalidae (Kretzoi, 1945)
  • Uintacyonidae (Hay, 1902)
  • Vulpavidae (Matthew, 1909)

Miacidae ("small points") is a former paraphyletic family of extinct primitive placental mammals that lived in North America, Europe and Asia during the Paleocene and Eocene epochs, about 65–33.9 million years ago. These mammals were basal to order Carnivora, the crown-group within the Carnivoraformes.

Miacids are thought to have evolved into the modern carnivorous mammals of the order Carnivora. They were small carnivores, superficially marten-like or civet-like with long, lithe bodies and long tails. Some species were arboreal, while others lived on the ground.

They probably fed on invertebrates, lizards, birds, and smaller mammals like shrews and opossums. Their teeth and skulls show that the miacids were less developed than modern carnivorans. They had carnivoran-type carnassials, but lacked fully ossified auditory bullae (rounded protrusions).