You can look up crinoids specifically stems and buttons and you'll get an idea.
was takling of the screw in the picture.
can find data on the animal/plant/whatever.
but when people find things that look like screws or spark plugs or whatever,
they don't seem to give data that would give clues as to what they might really be
if it is biological, the data would show up as random sizes.
yet they don't bother to give critical data.
just like the planes and trucks that are said to show up from other worlds.
yet not a comment as to if the bolts are SAE, metric, Wentworth, or something else.
or they all match ? or do they fit just a few systems like hardware from this planet ?