Ostracod?

[historianmichael]

I recently collected at an exposure of the Rochester and McKenzie Formations in Maryland. The ostracod typical of these formations is Kloedinella. While I did find a lot of those ostracods, I also found these two fossils. My initial guess is that they are of a different ostracod, Leperditia. I tried to Google to identify if Leperditia can be found in these Formations but I did not have much luck answering that question. What do you all think? Any help is greatly appreciated. 

 

 

[EMP]

On 7/29/2020 at 6:00 PM, historianmichael said:

I recently collected at an exposure of the Rochester and McKenzie Formations in Maryland. The ostracod typical of these formations is Kloedinella. While I did find a lot of those ostracods, I also found these two fossils. My initial guess is that they are of a different ostracod, Leperditia. I tried to Google to identify if Leperditia can be found in these Formations but I did not have much luck answering that question. What do you all think? Any help is greatly appreciated. 

 

   

 

Was this the site from Burns' book? 

 

Leperditia is reported from the McKenzie Formation by the MGS, and it's a very common genus in the underlying Rose Hill and the overlying Wills Creek and Tonoloway Formations, so it's safe to suggest it.  IIRC Leperditia is mostly smooth and has a small tubercle, which your first and second appear to have. The third looks to have several tubercles, similar to Chilobolbina or Aparchites, but then again I'm not an expert on ostracods.