Palaeosinopa

Palaeosinopa; Temporal range: late Paleocene to early Eocene
	reconstruction of Palaeosinopa didelphoides
	fossil of Palaeosinopa didelphoides from Wyoming
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	†Pantolesta
Family:	†Pantolestidae
Subfamily:	†Pantolestinae
Genus:	†Palaeosinopa; Matthew, 1901
Type species
	†Palaeosinopa didelphoides; Cope, 1881
Species
	†P. aestuarium (Beard & Dawson, 2009); †P. didelphoides (Cope, 1881); †P. dorri (Gingerich, 1980); †P. incerta (Bown & Schankler, 1982); †P. lacus (Gunnell, 2016); †P. lutreola (Matthew, 1918); †P. nunavutensis (Eberle & McKenna, 2002); †P. osborni (Lemoine, 1891); †P. reclusum (Rankin, 2014); †P. russelli (Smith, 1997);
Synonyms
	synonyms of species: P. didelphoides: Ictops didelphoides (Cope, 1881) ; Palaeosinopa veterrima (Matthew, 1901) ; ;

Palaeosinopa ("ancient Sinopa") is an extinct genus of semi-aquatic mammals belonging to the subfamily Pantolestinae within family Pantolestidae. Species in this genus lived from the late Paleocene to early Eocene in North America and Europe. Their diet consisted of other aquatic life forms.