Crinoidal Holdfast?

[ClearLake]

Here is a picture of what I believe to be a crinoidal holfast on a brachiopod shell.  This is very small (scale on the side are mm's) but I thought it was pretty neat looking.  I found this while cleaning some of my material I collected earlier this year from the Haragan Formation (Lower Devonian) near Clarita, Oklahoma.  When I first saw it, I thought: "this looks like a little starfish", then I learned to count!    So I am assuming this a a holdfast, but I am wondering if anyone can : 1) confirm that; 2) provide any more precise ID; 3) point me to any references that might help.  I have gone through Oklahoma Geological Survey Circular 55 on crinoids, but did not see anything like it (it doesn't have much on holdfasts, no surprise).  Thanks for any help anyone can offer.

[Tidgy's Dad]

Yes, that's a nice little crinoid holdfast, or possibly another stalked echinoderm. 

Think it might be a bit difficult to isolate which one though.