Tytthaena
Tytthaena ("little hyena") is an extinct genus of oxyaenids from subfamily Tytthaeninae. It lived during the late Paleocene to early Eocene in North America. Two species are known, "T. parrisi" and "T. lichna". Description. "Tytthaena" is the smallest oxyaenid known. Morphologically, it resembles "Oxyaena". It can be distinguished from other oxyaenids by its size and dentition. Its molars were narrow, with elongate talonids. Phylogeny. The phylogenetic relationships of genus "Tytthaena" are shown in the following cladogram.