Melanopsis fossilis is an extinct species of sea snail, a freshwater gastropod mollusk in the family Melanopsidae.

94, figs 912-914) described and illustrated the species as Pyrum fossile monstrosum f. amorphon and referred to Walch's work.

Gmelin (1791, p. 3485) referred to Martini's work, described the species and was the first to assign a valid name to the taxon ("Buccinum fossile").

The last summary of the status of M. fossilis was provided by Fischer (1996), but his conclusions were unfortunately based on misinterpretations and nomenclatural errors.

[1] Fossils of this marine species were found in Miocene strata in Moravia, Tsjech Republic; also in Hungary.