Sinopa

Sinopa ("swift fox")^[12] is an extinct genus of placental mammals from extinct clade Sinopinae within extinct order Hyaenodonta, that lived in North America and Asia from the early to middle Eocene.^[13][14]

Sinopa Temporal range: 50.5–39.7 Ma PreꞒ Ꞓ O S D C P T J K Pg N Early to Middle Eocene
Sinopa major skeleton
Sinopa rapax skeleton
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	†Hyaenodonta
Clade:	†Sinopinae
Genus:	†Sinopa Leidy, 1871
Type species
†Sinopa rapax Leidy, 1871
Species
†S. jilinia (Morlo, 2014)[1] †S. lania (Matthew, 1909)[2] †S. longipes (Peterson, 1919)[3] †S. major (Wortman, 1902)[4] †S. minor (Wortman, 1902) †S. piercei (Bown, 1982)[5] †S. pungens (Cope, 1872)[6] †S. rapax (Leidy, 1871)[7] †S. sp. A [AMNH FM 11538] (Matthew, 1906)
Synonyms[8]
synonyms of genus: Mimocyon (Peterson, 1919) Proviverroides (Bown, 1982) Stypolophus (Cope, 1872) Triacodon (Marsh, 1871) synonyms of species: S. longipes: Miacis longipes (Simpson, 1945) Mimocyon longipes (Peterson, 1919) Proviverra longipes (Dawson, 1980) S. major: Proviverra grangeri (Van Valen, 1965)[9] Proviverra major (Gustafson, 1986)[10] Sinopa grangeri (Matthew, 1906) S. minor: Proviverra minor (Van Valen, 1965) S. piercei: Proviverroides piercei (Bown, 1982) S. pungens: Proviverra pungens (Van Valen, 1965) Stypolophus pungens (Cope, 1872) S. rapax: Proviverra rapax (Van Valen, 1965) Sinopa aculeatus (Cope, 1871)[11] Stypolophus aculeatus (Cope, 1872) Stypolophus rapax Triacodon aculeatus (Cope, 1872) Triacodon fallax (Marsh, 1872)

Description

Sinopa was a small genus of hyaenodontid mammals. Its carnassial teeth were the second upper molar and the lower third. Sinopa species had an estimated weight of 1.33 to 13.97 kilograms.^[15] The type specimen was found in the Bridger formation in Uinta County, Wyoming, and existed 50.3 to 46.2 million years ago.

Taxonomy

The putative African species "Sinopa" ethiopica from Egypt was considered a species of Metasinopa by Savage (1965), although Holroyd (1994) considered it a potential new genus related to Quasiapterodon.^[16]