bluegilldvm Posted September 28, 2020 Share Posted September 28, 2020 This is black shale from southern Grundy County, Illinois from a private rec club found in the spoils hills throughout the club. I have found a few listracanthus spines and numerous bivalves from this area. I am unsure as to what these structures are but thinking a type of mollusk or ammonite. Pics 1-3 is one fossil and pics 4 and 5 is another fossil. Thanks 5 Link to comment Share on other sites More sharing options...
ClearLake Posted September 28, 2020 Share Posted September 28, 2020 Looks like a nice little (although somewhat crushed) orthoconic nautiloid. 2 Link to comment Share on other sites More sharing options...
minnbuckeye Posted September 29, 2020 Share Posted September 29, 2020 That cephalopod sure stands out against the black matrix!!!!! Nice find. Out of curiosity, how did the name @bluegilldvm come to be? A veterinarian that likes to fish? Mike Link to comment Share on other sites More sharing options...
Planko Posted September 29, 2020 Share Posted September 29, 2020 Wow..those are really cool. Nice finds. Link to comment Share on other sites More sharing options...
ClearLake Posted September 29, 2020 Share Posted September 29, 2020 25 minutes ago, minnbuckeye said: A veterinarian that likes to fish? Could it be your long lost twin, Mike!? Link to comment Share on other sites More sharing options...
minnbuckeye Posted September 29, 2020 Share Posted September 29, 2020 @ClearLakeWe will see!! Link to comment Share on other sites More sharing options...
bluegilldvm Posted September 29, 2020 Author Share Posted September 29, 2020 @minnbuckeye - I’m veterinarian that studied fish medicine. Grew up catching mainly bluegills, so they are my favorite fish. Unfortunately I don’t fish too much anymore. Too much time working and looking for fossils. @ClearLake- Thanks for the ID!!!! 2 Link to comment Share on other sites More sharing options...
minnbuckeye Posted September 29, 2020 Share Posted September 29, 2020 1 minute ago, bluegilldvm said: Unfortunately I don’t fish too much anymore Well then, you must be a distant cousin and not my twin!! Actually, the last 2 years of my veterinary career, in addition to maintaining my practice, I became the veterinarian for the Minnesota State Trout Hatcheries. ALL my knowledge of fish medicine was learned from this experience. Hopefully we will continue to see your finds! Mike Link to comment Share on other sites More sharing options...
RCFossils Posted September 29, 2020 Share Posted September 29, 2020 Pseudorthoceras socialis 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted September 29, 2020 Share Posted September 29, 2020 15 hours ago, RCFossils said: Pseudorthoceras socialis Do you mean Isorthoceras sociale ? Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
piranha Posted September 29, 2020 Share Posted September 29, 2020 1 hour ago, Tidgy's Dad said: Do you mean Isorthoceras sociale ? Isorthoceras is Ordovician. Pseudorthoceras is found in the Carboniferous. 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted September 29, 2020 Share Posted September 29, 2020 1 hour ago, piranha said: Isorthoceras is Ordovician. Pseudorthoceras is found in the Carboniferous. Yes, I know. Though I think Pseudorthoceras is Permian as well. I just don't know of the species Pseudorthoceras socialis and am interested in knowing more. I wondered if he's mixed up a couple of species. Like i do, as you know! Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
piranha Posted September 29, 2020 Share Posted September 29, 2020 And there are also records of Pseudorthoceras from the Devonian, but it is primarily found in the Carboniferous. The OP mentioned that Listracanthus is found in the same area so logically we can exclude an Ordovician taxon. 1 Link to comment Share on other sites More sharing options...
LabRatKing Posted September 29, 2020 Share Posted September 29, 2020 Magnificent find. I freely admit I just spit coffee all over my keyboard when I saw the pictures. This link might help us narrow down the identification if you happen to know the formation this shale is from. (USGS Grundy County Geologic Units) Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted September 29, 2020 Share Posted September 29, 2020 2 hours ago, piranha said: And there are also records of Pseudorthoceras from the Devonian, but it is primarily found in the Carboniferous. The OP mentioned that Listracanthus is found in the same area so logically we can exclude an Ordovician taxon. I am happy to agree. All I am asking for is info on the species Pseudorthoceras socialis as it is a new one for me. Can you help? Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
piranha Posted September 29, 2020 Share Posted September 29, 2020 I don't spend a lot of time on cephalopods, but at first glance it does not appear to be a valid name combination. 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted September 29, 2020 Share Posted September 29, 2020 1 hour ago, piranha said: I don't spend a lot of time on cephalopods, but at first glance it does not appear to be a valid name combination. Thanks. Which is why I was suggesting maybe @RCFossils had mixed up a couple of names. Like I do with Flexicalymene. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
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