Spirifer subaequalis?

[Peat Burns]

@Tidgy's Dad, I have this one as Spirifer subaequalis. Location and stratigraphic info in tags. Pedicle valve:  ~14 plications in sinus at margin. >20 on either side of sinus at margin (some not preserved). Thoughts?

[Tidgy's Dad]

Interestingly there is a Spirifer keokuk (though this isn't it).

Sorry, I don't know this species  or formation (except it's full of crinoids!) , though i would have a look at Neospirifer as well. 

 

[Peat Burns]

1 hour ago, Tidgy's Dad said:

Interestingly there is a Spirifer keokuk (though this isn't it).

Sorry, I don't know this species  or formation (except it's full of crinoids!) , though i would have a look at Neospirifer as well. 

 

You may like this *monster*. I originally had this as Spirifer grimesi but have concluded it is rather S. logani.  It's nearly a decimeter wide.

[Tidgy's Dad]

Monster indeed! 

I know of both genera, but couldn't tell them apart if I'm honest.

Except S. logani gets bigger, I suppose.  

I will try to post my biggest brachiopod tomorrow. 

[Archie]

Nice specimens!

[Innocentx]

The surface of the Logani is pretty interesting.

That's very white limestone.

[Peat Burns]

1 minute ago, Innocentx said:

The surface of the Logani is pretty interesting.

That's very white limestone.

Yes, very white.  And those white flecks might be the early development of beekite formation?  Not sure, but it reminds me of beekite, minus the characteristic concentric patterns. 

[Peat Burns]

1 hour ago, Archie said:

Nice specimens!

Thank you 

[Innocentx]

1 minute ago, Peat Burns said:

reminds me of beekite

I find these 'bubbles' on my stuff, as well. Maybe different conditions cause chalcedony to grow in different patterns?

[Tidgy's Dad]

It's a bit later than tomorrow, and i can't top 10 cm. 

Here is what I think is Megachonetes sp from the Lower Carboniferous Limestone of the Mendip Hills, Somerset, England.

Not sure about all the details as my Carboniferous stuff is still all mixed up and the labels are too. 

Width of brachiopod - 6 cm.

 

[Tidgy's Dad]

And from roughly the same location and age :

Gigantproductus sp.

9 cm across, what a shame she's not complete! 

Still a monster.

Close up :

 

[Peat Burns]

Just now, Tidgy's Dad said:

And from roughly the same location and age :

Gigantproductus sp.

9 cm across, what a shame she's not complete! 

Still a monster.

 

Lolololol.  I was just now in the process of replying to your post and was going to say that we both need to get our hands on a Gigantoproductus giganteus!

 

Great brach minds think alike...

[Tidgy's Dad]

5 minutes ago, Peat Burns said:

Lolololol.  I was just now in the process of replying to your post and was going to say that we both need to get our hands on a Gigantoproductus giganteus!

 

Great brach minds think alike...

Just added another piccie. 

Needs some prepping, but I love it. 

They were both self found too, which is great.

I found bigger ones in huge blocks and beds, but couldn't extract or carry them.

Never mind. 

[Peat Burns]

10 minutes ago, Tidgy's Dad said:

Just added another piccie. 

Needs some prepping, but I love it. 

They were both self found too, which is great.

I found bigger ones in huge blocks and beds, but couldn't extract or carry them.

Never mind. 

Those are beauts.  Here's a drawer of farm fresh ones from the Devonian.  Check out the Megastrophia. And look at the size of the Pseudoatrypa devoniana in my hand.  Biggest one I've ever seen.

[Tidgy's Dad]

Wow! 

That Pseudoatrypa is huge for its type.

The Megastrophia too.

And there's a shed load of good specimens there that'll look great with a bit of a poke with a pin. 

[westcoast]

Here's my big brachiopod contribution: Gigantoproductus sp. From tbe west of ireland. There are bigger out there but getting them out of the limestone is impossible.

[Peat Burns]

6 hours ago, westcoast said:

Here's my big brachiopod contribution: Gigantoproductus sp. From tbe west of ireland. There are bigger out there but getting them out of the limestone is impossible.

[Tidgy's Dad]

6 hours ago, westcoast said:

Here's my big brachiopod contribution: Gigantoproductus sp. From tbe west of ireland. There are bigger out there but getting them out of the limestone is impossible.

 

MONSTER ! ! ! ! 

[minnbuckeye]

On ‎1‎/‎31‎/‎2019 at 1:10 PM, Peat Burns said:

I have this one as Spirifer subaequalis. Location and stratigraphic info in tags. Pedicle valve:  ~14 plications in sinus at margin. >20 on either side of sinus at margin (some not preserved). Thoughts?

 

You are far more advanced than me , but in case, have you looked through State Geological Survey by Frank Dewolf, Mississippian Brachiopods of the Mississippi Valley Basin?  S textus ,subaequalis, tenuicostatus, veronensis or increbescens as possibilities????

 

 Just out of curiosity, were you creek hunting in Mediapolis or did you acquire quarry access??? I think Burlington is my favorite place to fossil hunt. It even beats Paulding!!!! LOL

 

Mike

[Peat Burns]

Just now, minnbuckeye said:

 

You are far more advanced than me , but in case, have you looked through State Geological Survey by Frank Dewolf, Mississippian Brachiopods of the Mississippi Valley Basin?  S textus ,subaequalis, tenuicostatus, veronensis or increbescens as possibilities????

Thanks, Mike. Yes, that is one of my most treasured monographs.  A real Bible for midwestern Mississippian brachs. It took a bit of detective work to find the second volume THAT HAS ALL THE PLATES, lol.  Together, the two volumes are over 650 pages long.  

[minnbuckeye]

2 minutes ago, Peat Burns said:

THAT HAS ALL THE PLATES

 

I am a picture person and could NOT find the plates.

[Peat Burns]

28 minutes ago, minnbuckeye said:

 

I am a picture person and could NOT find the plates.

Here you go.  This is one source.  I got a pdf from somewhere that I could download and print, but I forget where. This will get you by for now:

 

Weller (1914), Vol 2 - Plates

[minnbuckeye]

THANKS!!!!

[Peat Burns]

Just now, minnbuckeye said:

THANKS!!!!