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Showing results for tags 'cephalopod'.
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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. -
From the album: Minnesota Ordovician Decorah Cephalopods
Triptoceras oweni - heavily bryozoan encrusted specimen. Medium sized for a Decorah Formation Cephalopod. Twin Cities Minnesota Ordovician. -
From the album: Minnesota Ordovician Decorah Cephalopods
Typical view from above. Two specimens - one looked too odd to be a bryozoan. -
From the album: Minnesota Ordovician Decorah Cephalopods
Triptoceras planodorsatum Decorah Formation, Twin Cities, Minnesota. Very small, this is a side view showing the bend. -
From the album: Minnesota Ordovician Decorah Cephalopods
Another view from different side. -
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. -
From the album: Minnesota Ordovician Decorah Cephalopods
Very worn specimen with barely any details left. -
From the album: Minnesota Ordovician Decorah Cephalopods
Side view -
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. -
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. -
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. -
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. -
From the album: Minnesota Ordovician Decorah Cephalopods
Poterioceras apertum found in St. Paul Decorah Shale Spring 2023. Rare from the looks of it. -
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
- devonian
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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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- cephalopod
- deer creek formation
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From the album: Pennsylvanian fossils
Phylum: Mollusca Class: Cephalopoda Order: Orthocerida Family: Pseudorthoceratidae Genus: Mooreoceras- 1 comment
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- mooreoceras
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I’ve been trying to ID this huge cephalopod I found from the Glenshaw Formation in Brooke County, West Virginia. So far, I’ve considered the following: Millkoninckioceras Kummel, 1963 Mahoningoceras Murphy, 1974 I was all in on the latter name until I noticed the sutures were fairly straight compared to the deep convex flank sutures. Whitney (1882) called the sutures deeply concave on the holotype of Mahoningoceras (original description in photos below). The umbilicus is open. The specimen appears to be flattened. I believe the ventrolateral shoulder is about the middle of the bottom whorl in the second photo with a scale. The largest coiled nautaloid I've found in this formation could fit within the center whorl of this specimen. It seems that the body chamber would add another 1/4 whorl length. With metric scale: Coated with paraloid:
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- carboniferous
- cephalopod
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I’ve hunted the Beaufort and New Hanover County Yorktown and Castle Hayne Formations for years and have never seen this shape. I found a small collection of these close together and can’t tell if they’re from a single animal or several and where the individuals would begin or end. Remotely cephalopod-ish? But don’t track with anything I’ve seen. thanks! - Frank
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Found this critter in what I believe to be the Brush Creek Limestone. It is Carboniferous (Pennsylvanian), Glenshaw Formation, and looks like a nautilus to me, so I'd guess Solenochilus. Thanks for the help.
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- brush creek limestone
- carboniferous
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From the album: Texas Cretaceous Fossils : Various
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From the album: Texas Cretaceous Fossils : Various
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I found this cephalopod at the Lost Creek spillway site neat Jacksboro Texas. It's from the Finis Shale, Graham Formation, Upper Pennsylvanian. The largest dimension is 16 mm. It seems to be a replacement fossil so no sutures are showing and I don't know of any similar goniatites so that suggests a coiling nautiloid. The only thing I know of with a trapezoidal whorl cross-section like this is a Titanooceras and T. ponderosum has been found there but of course they are huge so it would have to be close to the protoconch. There is an off-center ridge going along the venter and the shell thickens greatly at the ventrolateral margins. I can check for any other features that might help with an ID. edit: It occurred to me that this may not be a cephalopod at all but a gastropod, Amphiscapha subrugosa but I haven't seen one with the ventral ridge. Ventral view Dorsal View
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- finis shale
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Hello. this one I found as part of fill on a dirt road in Illinois near the Mazon Creek area as I was looking for concretions. Part of the fossil was covered by a "hood" of limestone that I ground off with my dremel tool. I think this actually saved it from being really torn up on the road.
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