Stylinodon

Stylinodon ("tooth with pilar-like fibers")^[7] is an extinct genus of taeniodonts from extinct tribe Stylinodontini within subfamily Stylinodontinae and family Stylinodontidae, that lived in North America from early to middle Eocene.^{[8][9][10][11]}

Stylinodon Temporal range: 53.4–39.7 Ma PreꞒ Ꞓ O S D C P T J K Pg N early to middle Eocene
life restoration of Stylinodon mirus
skull of Stylinodon mirus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	†Taeniodonta
Family:	†Stylinodontidae
Subfamily:	†Stylinodontinae
Tribe:	†Stylinodontini Marsh, 1875[1]
Genus:	†Stylinodon Marsh, 1874[2]
Type species
†Stylinodon mirus Marsh, 1874
Synonyms[3]
synonyms of species: S. mirus: Calamodon cylindrifer (Cope, 1881)[4] Stylinodon cylindrifer (Wortman, 1896)[5] Stylinodon inexplicatus (Schoch & Lucas, 1981)[6]

With a weight between 54.9 kg (121 lb) and 109 kg (240 lb),^[8] and length of 1.30 m (4 ft 3 in),^[8] it had similar size to a pig. The skull suggests it had a blunt face, and a very short snout. Its canines had developed into huge, incisor-like root-less teeth. Stylinodon's molars were covered in enamel and continued growing throughout its life. Most likely, it fed on rough roots and tubers.^[12]

Phylogeny

Placentalia	Atlantogenata Boreoeutheria †Palaeoryctida †Ambilestes †Procerberidae †Alveugena †Taeniodonta †Schowalteria †Conoryctidae †Onychodectidae †Stylinodontoidea †Stylinodontidae †Wortmaniinae †Stylinodontinae †Psittacotheriini †Ectoganini †Stylinodontini †Stylinodon †Stylinodon mirus