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Can you help determine if these are real as described and any steps I might take to further confirm the details? [seller verbiage removed -- Staff]
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I'll start with images I've already posted on the forum. All are from the Kansas City metropolitan area. Winterset Limestone.... Metacoceras: Liroceras: Stenodomatoceras: Undetermined: Domatoceras umbilicatum: Wea Shale.... Metacoceras: Westerville Limestone.... Domatoceras: Chanute Shale.... Mooreoceras or Pseudorthoceras: Liberty Memorial Shale.... Metacoceras: I'll add many more images in the future.
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- missouri
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My last trip exploring the Maquoketa of Minnesota, a formation that is abundant in cephalopods, provided me with a serpenticone shaped specimen that I do not recognize. Help IDing this would be appreciated. The siphuncle is not visible in this specimen. I did some infill with putty to enhance its look (in my opinion). The small repair is delineated by the red marks.
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From the album: Minnesota Ordovician Decorah Cephalopods
Above view of fragile specimen of Triptoceras lambi-
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From the album: Minnesota Ordovician Decorah Cephalopods
different specimen, very fragile. Side view showing the siphuncle. Uncommon in Decorah Formation Twin Cities Minnesota.-
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- triptoceras
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From the album: Minnesota Ordovician Decorah Cephalopods
One of the largest Triptoceras species I have found in Decorah Formation Twin Cities Minnesota. This is a very worn specimen with septae lines barely visible.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Side view of the largest Triptoceras species in Decorah Formation Twin Cities Minnesota showing the trademark shape of genus Triptoceras.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Triptoceras oweni - heavily bryozoan encrusted specimen. Medium sized for a Decorah Formation Cephalopod. Twin Cities Minnesota Ordovician.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Typical view from above. Two specimens - one looked too odd to be a bryozoan.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Triptoceras planodorsatum Decorah Formation, Twin Cities, Minnesota. Very small, this is a side view showing the bend.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Another view from different side.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Triptoceras planoconvexum appear to be medium sized compared to the other Triptoceras species from Decorah Formation in Twin Cities. Rare.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Very worn specimen with barely any details left.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Side view-
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From the album: Minnesota Ordovician Decorah Cephalopods
The cut half which is a very thin shell filled with calcite minerals in a geode meaning it was complete hollow at the time of fossilization process.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Apparently Whitfieldoceras mumiaforme lasts into Decorah Formation from Platteville formation. This specimen has barely visible septae and is very thin. Seem to have enlargement on the left side which is constant with Whitfieldoceras and a bend along a certain portion of the shell. Ordovician, Decorah Formation, Twin Cities Minnesota. Rare.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Side view showing its general "pot belly" shape. It is hard for me to try to get any more details out of it other than this specimen being straighter than most cyrtoceras.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Top view - Rare in Decorah Formation Twin Cities. Small size, the muddy limestone made it hard to tell what species it is.-
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From the album: Minnesota Ordovician Decorah Cephalopods
A large Endoceras proteiforme. From Decorah shale. Only a little section of the shell remains on the lower half. The segmented part are septum and the smooth part are siphuncle.-
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From the album: Minnesota Ordovician Decorah Cephalopods
Poterioceras apertum found in St. Paul Decorah Shale Spring 2023. Rare from the looks of it.-
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From the album: Devonian - New York
Spyroceras crotalum Moscow Formation Middle Devonian Cole Hill, Madison Co., NY Self Collected - 2023-
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Cephalopod Belemnite Phragmocone UK Jurassic Oxford Clay
JamieLynn posted a gallery image in Member Collections
From the album: Jurassic Coast UK Oxford Clay Formation
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From the album: Jurassic Coast UK Oxford Clay Formation
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From the album: Pennsylvanian fossils
Phylum: Mollusca Class: Cephalopoda Order: Nautilida Family: Tainoceratidae Genus: Metacoceras?-
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- deer creek formation
- pennsylvanian
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Hello again, here are another two fossils (or not) that I'm unable to place. They come from llandovery formation locality Hýskov from a shallow sea rich with trilobites, graptolites, brachiopods, bryozoans and crinoids. All other llandovery formation localities in Czech republic are deep sea shales with only graptolite fauna and very few brachiopod species. 1) Hýskov is very rich with beautiful graptolite fauna, like this dendroid Dictyonema graptolites. This fossil (if it is fossil) is preserved in a very much same way as the graptolites, while other fauna there is more plastic. 2) This one is probably a cephalopod of some sort, probably related to Cyrtoceras? However I can't see any segmentation. The white structures are probably only some sort of secondary minerals? Thanks in advance for your opinions Ondrej
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