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connorp

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Here are a few small bits from the Cincinnatian (Upper Ordovician) roadcut near St Leon, IN, that I’m not sure of the IDs. They were all collected from the butter shale trilobite layer of the Liberty Formation.

 

First is what I think may be part of a crinoid? Not positive.

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Next, I have no idea. Maybe part of a crinoid. A fragment of a conulariid also crossed my mind.

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Here is a small brachiopod that I picked up thinking it was Zygospira but is definitely not.

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I’m guessing this trilobit is Flexicalymene, but I know a few other species of trilobites are found here so I wanted to check.

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Finally a few gastropods. The first two are internal molds so I’m not sure they can be ID’d.

 

#1)

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#2)

 

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#3)

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#1 is a crinoid calyx, and #2 is a crinoid anal sac.  You can find a good ID guide to Cincinnatian crinoids on the Dry Dredger's web site here.  Check out Plicodendrocrinus, but click around to see if anything else fits the bill as well.

 

Don

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1 hour ago, FossilDAWG said:

#1 is a crinoid calyx, and #2 is a crinoid anal sac.  You can find a good ID guide to Cincinnatian crinoids on the Dry Dredger's web site here.  Check out Plicodendrocrinus, but click around to see if anything else fits the bill as well.

 

Don

Plicodendrocrinus is definitely a match for the anal sac. Possibly a match for the calyx part. I'm going to try and clean around the few stem segments to get a look at the cross section to confirm. Thanks.

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14 minutes ago, Peat Burns said:

Holy **** those are great finds...:o

I went there searching for complete trilos, and seem to have found everything but one.

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15 minutes ago, connorp said:

I went there searching for complete trilos, and seem to have found everything but one.

I'll trade you a complete trilo or two for those crinoid pieces :D

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Very cool! A crinoid calyx is on my bucket list. I think I have a spot that will produce one, but no luck yet. Congrats!

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The good thing about science is that it's true whether or not you believe in it.  -Neil deGrasse Tyson

 

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Pete beat me to it.  I've searched that trilobite layer a few times and always find a few Flexicalymene but never a crinoid calyx.

 

Don

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  • 5 months later...

The brachiopod that is not Zygospira is a squashed rhynchonellid. 

Very nice finds.:)

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