Lossinia lissetskii is a fossil marine organism from Precambrian strata of the White Sea area, in Russia.

Fossils of Lossinia lissetskii are known from deposits of the Verkhovka and Yorga formations of the White Sea area, Arkhangelsk Region, Russia.

The full head and central axial part of trunk are covered by extensive ornamentation of small tubercles.

These tubercles hide the character of segmentation of the body near the axial zone, but most likely are isomers, normally seen in other typical Proarticulata.

The distinct head covered by tubercles is typical for small Proarticulata, such as Onega and Archaeaspinus,[1] and is unsegmented.