Lepidocoleus is a genus of extinct armored annelid worm in the class Machaeridia.

[1] The creature had a "suit" of armor running down its body in the form of overlapping calcite crystals.

[1] This worm probably lived in shallow water reefs feeding on organic waste.

[2] It lived from the Hirnantian of the upper Ordovician to the Famennian of the Devonian.

[3] The worm is tiny, only about a fraction of an inch long.