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Nimravis

Possible St. Leon (Ordovician) Edrioasteroid

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Nimravis

I am going through and sorting out fossils that I collected on a number of road trips that I did this year. I am looking to see if someone, maybe @Peat Burns or @Herb , with experience in the Ordovician from St. Leon, Indiana can confirm what I think may be a couple Edrioasteroid (Isorophus cincinnatiensis).

 

IMG_8818.thumb.jpg.c266178869ff20e7515cfaa8944dd58a.jpgIMG_8819.thumb.jpg.eb9e282e8295bcacc49f086d576e779e.jpgIMG_8820.thumb.jpg.4c4e8804a4f8dd295f15cd247b95bda0.jpgIMG_8821.thumb.jpg.aa4db82733781792a0317b29e13d1f09.jpg

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Peat Burns

It sure looks like a possible candidate.  The third photo has the raised margin, but I can't see the typical raised, sinuous arms.  Could you get some oblique lighting on it to perhaps accentuate the contours?  Might need some prep.  Hope it is.  I haven't found an edrioasteroid yet :(

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Shamalama

I'm going to vote no on the Edrio for both of these. They look like buttons of rock that emulate the shape but do not have any other features. I don't see any arms, or plates for that matter, that suggest them to be Edrioasteroids.

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Nimravis

d@Shamalama and @Peat Burns - I am going to agree with both of you on this. After looking more closely at them, I think that they may just be some type of mold- I was thinking that they were at first because I thought the little spot on both was the anus ( as shown on the Dry Dredgers site), but it that spot is on both sides of one of them- thanks for the input.

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Herb

Sorry, I don't think they are edrios either. Haven't found one either

 

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Peat Burns
1 hour ago, Nimravis said:

d@Shamalama and @Peat Burns - I am going to agree with both of you on this. After looking more closely at them, I think that they may just be some type of mold- I was thinking that they were at first because I thought the little spot on both was the anus ( as shown on the Dry Dredgers site), but it that spot is on both sides of one of them- thanks for the input.

Yeah, it was a long shot.  Good that you picked it up.  I don't pick up as many questionable objects as I should, which is probably why I don't have an edrioasteroid yet :(

 

I'd probably have better luck going back and looking at the thousands of brachiopods I have.  I wouldn't be surprised if there is one stuck on one of those that I didn't notice.:blush:

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Nimravis
1 hour ago, Northern Sharks said:

No edrio there. For future reference the anus/periproct is not in the center, but between the arms closer to the outer edge. In Isorophusella, it looks like a pizza. This pic isn't the greatest to show it, but it is below the center

isorophusella.jpg

Wow- that does look totally different than the two things that I picked up- thanks for posting that pic, it shows great detail.

@Herb and @Peat Burns thanks for your input, I appreciate it.

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abyssunder

Well written! :)

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