-
Sam Ocon posted a new activity comment 4 years, 2 months ago
4 years, 2 months ago4 years, 2 months agoHi, @Linda-Lewis, do you know what rock layer is this from? Also, @VPerez or @Bill-Heim, can you check this ID?
-
Sam Ocon posted a new activity comment 4 years, 2 months ago
4 years, 2 months ago4 years, 2 months agoHi, @Linda-Lewis! Do you have any more information about the rock layers this specimen was found in? Also, @VPerez or @Bill-Heim, can you confirm this ID?
-
Sam Ocon posted a new activity comment 4 years, 2 months ago
4 years, 2 months ago4 years, 2 months agoHi, @Linda-Lewis! Do you have any more information about the rock layers this specimen was found in? Also, @VPerez or @Bill-Heim, can you confirm this ID?
-
Sam Ocon posted a new activity comment 4 years, 2 months ago
4 years, 2 months ago4 years, 2 months agoHi, @Linda-Lewis! Do you have any more information about this specimen? Also, @VPerez or @Bill-Heim, can you confirm this ID?
-
Sam Ocon posted a new activity comment 4 years, 2 months ago
4 years, 2 months ago4 years, 2 months agoHi, @Linda-Lewis, do you have any more information about this specimen? Also, @VPerez or @Bill-Heim, do you have any more insight into this ID?
-
Sam Ocon posted a new activity comment 4 years, 2 months ago
4 years, 2 months ago4 years, 2 months agoHi, @Linda-Lewis! Do you have any more information about this specimen? Also, @VPerez, can you assist with this ID?
-
Sam Ocon posted a new activity comment 4 years, 2 months ago
4 years, 2 months ago4 years, 2 months agoHi, @Linda-Lewis! Do you have any information on the rock layers or age of these fossils? Also, @Bill-Heim, do you have any insight on this ID?
-
Sam Ocon posted a new activity comment 4 years, 2 months ago
4 years, 2 months ago4 years, 2 months agoHi, @Linda-Lewis! Do you have any more information about the age or rock layers that this came from?
-
Sam Ocon posted a new activity comment 4 years, 2 months ago
4 years, 2 months ago4 years, 2 months agoHi, @Linda-Lewis! Do you have any information about the rock layers these were found in? Also, @Bill-Heim, can you confirm this ID?
-
MacKenzie Smith posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months ago@linda-lewis@jbauer Yes, there are solitary scleractinians. I think the easiest way to tell them apart is to look at their septal symmetry (here is an example https://ucmp.berkeley.edu/cnidaria/anthozoamm.html). Rugose are bilateral and scleractinians have hexagonal symmetry. To me, the specimen looks more bilateral but that could be because of…[Read more]
-
I was trying to remember the symmetry but I think it goes deeper into the pattern of septae too. There is something very different about rugose. There is also a pattern in the exterior growth that I don’t see here, but am not sure how to verbally define. Thanks for chiming in @mackenzie-smith! Always good to get another set of eyes on these =]
-
It’s possible, but I’d say it’s unlikely. Montross is right between the Rappahannock and Potomac rivers, both of which are pretty much all Cenozoic until 40-50 miles upstream. And neither river is a straight-shot to the ocean; the Potomac in particular has lots of snakey curves that I would think would catch fossils tumbling along in the current.
-
-
Nathan Newell posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months ago@linda-lewis Hi, Linda! This is a curious find because the rocks in that area are primarily Tertiary in age, and I don’t think that horn corals survived until then. Are you sure you didn’t find this somewhere more towards the mountains?
Regardless, thanks for posting it. The details on this specimen look really cool. 🙂
-
To me the coral looked scleractinian but I was afraid to say it! The way the septae (spokes on the wagon wheel) are different in rugose v scleractinia. I can’t find anything at the moment to support this but I want to say it has to do with the number 6 in scleractinia and rugose is 4 or something crazy like that. Maybe @mackenzie-smith remembers…
-
I’m flipping though my handy dandy Audubon fossil field guide, and the Parasmilia looks really similar to this. What do you think?
-
I agree it looks really similar and is totally a possibility!
-
-
-
-
Jennifer Bauer posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoHi, @linda-lewis – I’m not super familiar with the area but maybe @nathan-newell, a more local expert, could help you fill in some of the gaps on your dataset.
-
@linda-lewis Hi, Linda! This is a curious find because the rocks in that area are primarily Tertiary in age, and I don’t think that horn corals survived until then. Are you sure you didn’t find this somewhere more towards the mountains?
Regardless, thanks for posting it. The details on this specimen look really cool. 🙂
-
To me the coral looked scleractinian but I was afraid to say it! The way the septae (spokes on the wagon wheel) are different in rugose v scleractinia. I can’t find anything at the moment to support this but I want to say it has to do with the number 6 in scleractinia and rugose is 4 or something crazy like that. Maybe @mackenzie-smith remembers…
-
I’m flipping though my handy dandy Audubon fossil field guide, and the Parasmilia looks really similar to this. What do you think?
-
I agree it looks really similar and is totally a possibility!
-
-
-
-
@linda-lewis @jbauer Yes, there are solitary scleractinians. I think the easiest way to tell them apart is to look at their septal symmetry (here is an example https://ucmp.berkeley.edu/cnidaria/anthozoamm.html). Rugose are bilateral and scleractinians have hexagonal symmetry. To me, the specimen looks more bilateral but that could be because of…[Read more]
-
I was trying to remember the symmetry but I think it goes deeper into the pattern of septae too. There is something very different about rugose. There is also a pattern in the exterior growth that I don’t see here, but am not sure how to verbally define. Thanks for chiming in @mackenzie-smith! Always good to get another set of eyes on these =]
-
It’s possible, but I’d say it’s unlikely. Montross is right between the Rappahannock and Potomac rivers, both of which are pretty much all Cenozoic until 40-50 miles upstream. And neither river is a straight-shot to the ocean; the Potomac in particular has lots of snakey curves that I would think would catch fossils tumbling along in the current.
-
-
-
Jennifer Bauer posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoHi @linda-lewis – interesting specimen. I wonder if @mellwood or @vperez have any experience with crabs in the Maryland area?
-
Jennifer Bauer posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoHi, @linda-lewis – check out the Neogene Atlas to help you narrow down the species identificaiton. https://neogeneatlas.net/genera/Chesapecten/
-
Jennifer Bauer posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months ago@linda-lewis if you are interested in learning more about the area’s geologic context check out Macrostrat: https://macrostrat.org/map/#/z=11.7/x=-76.4412/y=38.3779/bedrock/lines/
-
Jennifer Bauer posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoHi, @linda-lewis – are you looking for some identification help with this one? Could it be a turtle bit? @jeanette-pirlo may have some suggestions. Talk to you soon, Jen
-
Jennifer Bauer posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoHi, @linda-lewis – How did you identify this down to the species level? After some research it seems like it may be Acropora but I’m not sure about the species! Looking forward to learning from you, Jen
-
Jennifer Bauer posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoHi, @linda-lewis – you have a typo in the generic assignment that must have caused the taxon wizard to think it was a trilobite rather than an echinoid.
The correct spelling is Abertella aberti – can you try to correct this? If you type that species into the wizard it should work.
Please let me know if you need help.
Thanks, Jen -
Jennifer Bauer posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoHi, @linda-lewis – what features are you using to identify this as an echinoid? It appears almost featureless. Have you seen anything like this, @vperez, being familiar with the location?
-
Jennifer Bauer posted a new activity comment 4 years, 8 months ago
4 years, 8 months ago4 years, 8 months agoHi, @linda-lewis – really amazing specimen. Is this in your personal collection? If so we would want to mark it as a high quality specimen so the information would be shared with iDigBio for others to find. If you are uncomfortable sharing the location, could we make a note in the field notes section saying if someone were interested in the…[Read more]
- Load More
H. serra is correct