Is this the end of a (Pentacrinites?) crinoid stem? Robin Hood's Bay, UK (Jurassic)

[EntomoloJosh]

Hello,

 

I collected this fossil from Robin Hood's Bay, North Yorkshire, UK, and I initially thought it was a sea-urchin type echinoderm (later identifying it as Nucleolites). However I also found what I knew what a crinoid stem, (Pentacrinites, I think? One of the star-shaped ones) and noticed that the end pattern looked a lot like my "sea-urchin" fossil. So I'm wondering if this fossil is the imprint of the end of a Pentacrinites crinoid stem?

 

Thank you!

[Rockwood]

Bingo! You got it. 

[EntomoloJosh]

1 hour ago, Rockwood said:

Bingo! You got it. 

Woo! Thank you!!

[TqB]

Isocrinid crinoid but not actually Pentacrinites which I think doesn't occur there. It's a good match for Hispidocrinus scalaris which is common in the Bay. (It used to be a Pentacrinites but that's been quite heavily revised.)

[EntomoloJosh]

1 hour ago, TqB said:

Isocrinid crinoid but not actually Pentacrinites which I think doesn't occur there. It's a good match for Hispidocrinus scalaris which is common in the Bay. (It used to be a Pentacrinites but that's been quite heavily revised.)

Ah ok, thanks for letting me know! Here's an image of the other stem I found in case that helps at all (assuming these two specimens are the same species, although they weren't found together)

 

[TqB]

18 minutes ago, EntomoloJosh said:

Ah ok, thanks for letting me know! Here's an image of the other stem I found in case that helps at all (assuming these two specimens are the same species, although they weren't found together)

I think those are the same. I'm not an expert but I have the excellent monograph by M. J. Simms (1989), "British Lower Jurassic Crinoids".