Unknown Chengjiang Microfossils

[connorp]

I was splitting a piece of shale from one of the formations that holds the Chengjiang biota, and found quite a few of these small things. They're no more than 2 mm in length and to the naked eye, look like small red lines. The pictures below were taken at 4x magnification (first picture above is one specimen, latter three are another specimen).

 

 

First thought was some segmented worm, but I'm not super convinced. Any ideas?

[Tidgy's Dad]

Algal filaments, perhaps? 

[connorp]

A few more I found.

 

[connorp]