Unknown Ordovician Fossils

[TheCanadian]

Hey

 

I am currently going through and reorganizing my collection when I came across these that have no Id information, I was wondering if I could get some help with these fossils. The first was sent to me by a friend in Montreal, QC,  and was collected on the south shore. Other than that, no information came with it. I think its an endocast from a snail shell. The second and third I collected personally, and they are from the Hull formation in Ottawa,  ON. The second is a brachiopod, but I don't know the species. Finally, the third is also from the same site, and is about 2 cm long. When I first recorded it I labeled it as a split snail shell, but I'm questioning that now.

 

Thanks in advance for your help everyone.

 

 

[Kane]

Very nice.  

I think the brachiopod may be Rhynchotrema sp., but let me tap our resident brachiophile @Tidgy's Dad to confirm.

[Tidgy's Dad]

Yup, Kane is correct. 

That's Rhynchotrema increbescens, I'm fairly certain. 

[Mark Kmiecik]

I think the first is a steinkern/endocast of a gastropod, and the third is a cross-section of one. I'm not an expert, so wait for others to confirm or dispute.

[Rockwood]

I think the first and third must be odd (worn combination of columnal and lumen cast) sectioning of crinoid stems. 

Notice the angular nature of the lighter inner shape (lumen cast) in the last shot.

[Mark Kmiecik]

26 minutes ago, Rockwood said:

I think the first and third must be odd (worn combination of columnal and lumen cast) sectioning of crinoid stems. 

Notice the angular nature of the lighter inner shape (lumen cast) in the last shot.

I see and agree.