Leucocephalonemertes is a monotypic genus of ribbon worms belonging to the family Lineidae.

The only species is Leucocephalonemertes aurantiaca.

[1] The genus name, Leucocephalonemertes, comes from the Greek leucos, meaning white, kephalos, meaning head, and Nemertes, from which the phylum name (Nemertea) is also derived.

[2] The species epithet, aurantiaca, comes from the modern Latin aurantium, meaning orange.

[2] The species is found in Western Europe; specifically, it has been recorded from the UK, Norway, Italy, France, and Cabrera, Spain.