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Waccamaw Formation Gastropod ID Help


historianmichael

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historianmichael

A couple of weeks ago now I stumped upon several outcrops of the Early Pleistocene Waccamaw Formation in South Carolina. I have been able to identify the various mollusk that I found except for these last three gastropods. Either the resources I have found don't include an example that matches these specimens or it was just too close of a call. I would love to get some opinions on what these might be. Any help would be greatly appreciated. Thank you so much!

 

#1- Petaloconchus sculpturatus?

71337020_ScreenShot2021-09-14at9_28_07AM.thumb.png.f61c56a61a849541c0dcde01e9debdb1.png


#2- Ilynassa sexdentata?

925153081_ScreenShot2021-09-14at9_27_35AM.png.fab5d7e1a363f305cce1765ba038b5db.png 1283618664_ScreenShot2021-09-14at9_27_41AM.png.3027bd5f91d8fd13fa359045b501c405.png

 

#3- Phrontis sp.?

1273124056_ScreenShot2021-09-14at9_32_17AM.png.774ee63f0d5c89d3d9ae500336c3d48f.png 1650298956_ScreenShot2021-09-14at9_32_28AM.png.1e24d5204f3d4f036b93db57d8ede8d1.png

Edited by historianmichael
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#1 looks closer to Vermicularia

#2 appears to be correct

#3 looks like Nassarius bidentata, but I don't know if it made it out of the Late Pliocene.  Julia Gardner's USGS Professional Paper 199 could help with Nassariidae.

 

Mike

Edited by MikeR
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historianmichael

Thank you so much @MikeR! Based on Julia Gardner's publication, the third one looks a little bit like Nassarius consenoides. What do you think?

Edited by historianmichael
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historianmichael
20 hours ago, MikeR said:

N. consenoides has incised lines that yours does not.  Look at N. neogenesis.

That is certainly a possibility. It tough to work with the specimen at such a small scale and it is a little beaten up. 

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