The phenomenon of left-right alternating segments is called glide reflection symmetry, and is a diagnostic feature of proarticulatans.

[2][3][4] Typically, the first few, or largest isomers are fused together to form a headshield-like structure, leading some researchers to have originally considered them to be ancestral or related to arthropods,[5][6] though, overwhelming evidence of them being proarticulatans have since led researchers to discard this hypothetical relationship.

[2][3] Class Vendiamorpha currently includes only one Family Vendiidae (originally referred to as Vendomiidae as the type genus Vendomia,[7] before V. menneri was redescribed as a member of Dickinsonia[8]) that consist of species Vendia sokolovi, V. rachiata, Paravendia janae and possibly Karakhtia nessovi, from Ediacaran (Vendian) rocks of the Arkhangelsk Region in Russia.

Originally, that fossil was interpreted as an arthropod,[10] later as a proarticulatan,[1] then conjectured as possibly a frond-like organism.

[11] Current scientific consensus now recognizes the poorly preserved holotype of Pseudovendia as a pseudofossil.