Sinopinae ("swift foxes") is an extinct clade of predatory placental mammals from extinct order Hyaenodonta. Fossil remains of these mammals are known from early to middle Eocene deposits in North America, Europe and Asia.
Classification and phylogeny Taxonomy Clade: †Sinopinae Genus: †Acarictis †Acarictis ryani (unranked): †Sinopa clade Genus: †Prototomus (paraphyletic genus) †Prototomus deimos †Prototomus girardoti †Prototomus martis †Prototomus minimus †Prototomus phobos †Prototomus robustus †Prototomus secundarius †Prototomus viverrinus Genus: †Sinopa †Sinopa jilinia †Sinopa lania †Sinopa longipes †Sinopa major †Sinopa minor †Sinopa piercei †Sinopa pungens †Sinopa rapax †Sinopa sp. A [AMNH FM 11538] Incertae sedis: †Sinopinae sp. [FMNH PM 59529]
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