Alagtsavbaatar (meaning "Alag Tsav hero") is an extinct species of carnivorous cat-like carnivoran belonging to the infraorder Aeluroidea.

[1] The first remains of Alagtsavbaatar to be found were collected in September 1989 by a field party organized by the Geological Institute of the Mongolian Academy of Sciences.

[1] Egi et al. (2016) found that PSS 40-15 showed dental features not matching Stenoplesictis, and concluded that this specimen represents a previously unknown genus.

[2] The only known postcranial element of Alagtsavbaatar is a humeral fragment (MPC-M30/80) which appears broken near the distal end of the deltapectoral crest, with the remaining part measuring 41.2 mm in length.

The trochlea is narrow, with a wider medial rim than median end, forming a large angle against the mediolateral axis.

[2] In the original description of the holotype, Dashzeveg (1996) assigned the species to the genus Stenoplesictis as S. indigenus, and placed it in the family Viverridae following Hunt (1989), which listed the Stenoplesictinae as a probable subfamily of viverrids.

[4] Egi et al. (2016) did not assign Alagtsavbaatar to any family in their description of the genus, placing it as Feliformia incertae sedis, though they do state that the Mongolian small feliforms (Alagtsavbaatar, Asiavorator and Shandogolictis) appear to form a monophyletic clade relative to the European genera Stenoplesictis, Palaeoprionodon and Haplogale, which independently evolved hypercarnivory.

[5] In this environment, sympatric predators included the nimravids Nimravus and Eofelis, the entelodontid Entelodon, and the related stenoplesictid Asiavorator.