Epibaion axiferus Ivantsov, 2002

Holotype. PIN, no. 3993/5199, chain consisting of 15 trace platforms that represent impressions of the ventral side of a single specimen; Arkhangelsk district, Zimnii Coast of the Wite Sea; Upper Vendian, Mesen Formation, Erginskii Bed.

Description. The body is elongated-oval and com-pletely subdivided into isomeres. Their orientation is, in general, radial, but 2/3 of isomeres in the posterior end are turned backward. Isomeres are narrow and equally thick. Only in the posterior part of the body and immediately near its anterior end does the thickness of isomeres decrease. Their number exceeds 120 pairs. The isomere surface is smooth. The longitudinal axis of the ventral side is marked by a narrow lobe tapered from both ends and connecting the inner ends of all isomeres. The width of the axial lobe is almost equal indifferent-size specimens.