Crinoid?

[Randomguy1]

Hey guys! I found this fossil in east Kansas (Pennsylvanian) and thought it was a crinoid. However the shape is different looking. Do you think it’s a crinoid? Thank you! (The 2 parts belong together and yeah it’s pretty eroded)

[Kane]

Nice find. I’d say it is an orthocone nautiloid.

[ynot]

+1 for orthocone.

[Randomguy1]

Here’s some more pics:

[Randomguy1]

11 minutes ago, Kane said:

Nice find. I’d say it is an orthocone nautiloid.

 

10 minutes ago, ynot said:

+1 for orthocone.

Thanks guys! That’s the first of its kind for me!

[Randomguy1]

But seriously everyone on this forum is just amazing! Nothing but friendliness and helpfulness!

[Bguild]

Yep, looks to be a nice chunk o’ nautoloid. Nice find!

[Tidgy's Dad]

Very nice end of an orthoconic nautiloid. 

[BobWill]

I agree, and to help you tell the difference between the two I'll point out a few ways to make the distinction. It looks like you already noticed the tapering shape. Crinoid stems are generally the same diameter all along the length whereas an orthoconic nautiloid will taper at varying angles depending on which one it is. You also can often see the crinulations between the sections of a stem if not on the ends, both absent on yours. When the ends are well preserved like one of yours is you can often see a septum, concave on one end and convex on the other. Sometimes you can also see evidence of the siphuncle near the center.