Uralic languages hypothesis has, however, been rejected by some specialists in Uralic languages, and has in recent times also been criticised by other Dravidian linguists, such as Bhadriraju Krishnamurti. In her book, "The Uralic language family: facts, myths, and statistics", linguist Angela Marcantonio argues against the existence of the Uralic family, claiming that the languages are no more closely related to each other than they are to various other Eurasian languages. All of these hypotheses are minority views at the present time in Uralic studies. Various unorthodox comparisons have been advanced such as Finno-Basque, Hungarian-Etruscan, and Cal-Ugrian. These are considered at best
Uralic languages evidence of a number of extinct languages of uncertain affiliation: Traces of Finno-Ugric substrata, especially in toponymy, in the northern part of European Russia have been proposed as evidence for even more extinct Uralic languages. All Uralic languages are thought to have descended, through independent processes of language change, from Proto-Uralic. The internal structure of the Uralic family has been debated since the family was first proposed. Doubts about the validity of most of the proposed higher-order branchings (grouping the nine undisputed families) are becoming more common. A traditional classification of the Uralic languages has existed since the late 19th