When discovered in the 19th century and during the following decades,Phlaocyon was thought to be ancestral toraccoons because of sharedconvergent adaptations towardhypocarnivorous dentitions, butHough 1948 was the first to discover the canid nature of the middle ear region inP. leucosteus andPhlaocyon in now believed to be part of very diverseclade of hypocarnivorous canids, thePhlaocyonini, and only distantly related to raccoons.[3]
P. mariae andP. yatkolai, both known from isolated teeth and fragmentary material, are the largest and most derived species, and both display a tendency away from thehypocarnivorous dentition of the genus and towards a morehypercarnivorous dentition.[4]
Phlaocyon was about 80 centimetres (31 in) in body length, and looked more like acat orraccoon than a dog, but its skull anatomy shows it to be a primitive canid.Phlaocyon probably lived like a raccoon, often climbing trees. Its head was short, wide, and had forward-facing eyes. Unlike modern canides,Phlaocyon had no specialised teeth for slicing flesh. It is thought to have been anomnivore.[5]
Hough, J. R. (1948). "The auditory region in some members of the Procyonidae, Canidae and Ursidae: its significance in the phylogeny of the Carnivora".Bulletin of the AMNH.92.hdl:2246/921.
Wang, X.; Tedford, R. H.; Taylor, B. E. (1999). "Phylogenetic systematics of the Borophaginae (Carnivora, Canidae)".Bulletin of the AMNH.243.hdl:2246/1588.
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