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Shamalama

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I'm working on being able to ID the many shells from the Ordovician around Cincinnati and central Kentucky. Today I grabbed a bunch of Platystrophia, which is ubiquitous to the region, and I was able to ID most of them but two are frustrating me. Any help is appreciated verifying my IDs and suggesting what the unknowns are.

Pic of the dorsal (bottom) valves of eight similar looking shells, I've labeled the ones I think I know.

post-1408-1244676900_thumb.jpg

Pic of the ventral (top) valves of eight similar looking shells, I've labeled the ones I think I know.

post-1408-1244676986_thumb.jpg

P. acultilirata

post-1408-1244677014_thumb.jpg post-1408-1244677006_thumb.jpg

P. cypha

post-1408-1244677028_thumb.jpgpost-1408-1244677022_thumb.jpg

P. laticosta

post-1408-1244677081_thumb.jpg post-1408-1244677076_thumb.jpg

P. ponderosa

post-1408-1244677120_thumb.jpgpost-1408-1244677107_thumb.jpg

another, smaller P. ponderosa?

post-1408-1244677157_thumb.jpg post-1408-1244677152_thumb.jpg

Unknown Platystrophias

post-1408-1244677497_thumb.jpg post-1408-1244677502_thumb.jpg

post-1408-1244677507_thumb.jpg post-1408-1244677512_thumb.jpg

Lepidocyclus (not the same species but looks similar and can be confusing)

post-1408-1244677554_thumb.jpg post-1408-1244677548_thumb.jpg

-Dave

__________________________________________________

Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPhee

If I'm going to drive safely, I can't do geology. - John McPhee

Check out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/

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Guest solius symbiosus

The one on the top right looks like an Orthorynchulla sp. The other I have seen, and have it in some literature somewhere. I'll look for it later.

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The one on the top right looks like an Orthorynchulla sp. The other I have seen, and have it in some literature somewhere. I'll look for it later.

See, I was thinking the top right shell might be P. hopensis based on the pics from the Dry Dredgers site.

-Dave

__________________________________________________

Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPhee

If I'm going to drive safely, I can't do geology. - John McPhee

Check out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/

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Shamalama..... Beautiful 'crisp' examples...... very nice collection.... well done.....

Cheers Steve... And Welcome if your a New Member... :)

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