The Russian zoologist Ognev acknowledged Zukowsky’s assessment but also suggested that more material is needed for a definite taxonomic classification of this cat.
Sergej Ivanovich Ognew (1886–1951) was a Russian zoologist and naturalist, remembered for his work on mammalogy.
They can occasionally reach greater sizes than their Kamchatka counterparts: the largest skull measured by Sergej Ognew (1931) was only slightly smaller than that of the largest Alaskan bear on record at the time.