Temnoxa molluscula is a small creature approximately 8 mm wide found in the Ediacaran period (558-555 Ma)[1] in Russia.

Due to the lack of information regarding the fossils of this organism, researchers are unable to place Temnoxa molluscula into any known phylum.

However, there are opposing theories regarding the accuracy of this categorization because its unsegmented body and U-shaped head is far too large to be considered a mollusk.

[3] It also lacks a single shield-like mantle, although a mantle-like structure appeared to slip away from a dorsal side of the body in the holotype.

Another reason scientists hypothesize mobility for this organism is because in 2017, researchers from around the world observed the way that water flowed around its shell.