Dragons, Dogs & Amadillos?

[Bluetoes101]

Looking at the detail on the three figures with the wavy lines on the page. The vertical straight lines seem to be "part of" the wavy line, at least all of them follow the same sequence of having the wavy line followed by straight vertical lines, the two examples that are not this creature have double versions of this, all wavy then straight vertical lines. After the vertical lines we have dots and squiggly lines on one, and just squiggly lines on the other.

I wonder if this wavy line + straight vertical line shows up elsewhere, rather than just the normal wavy line examples?