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Showing results for tags 'cephalopod'.
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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
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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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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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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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I was in Milwaukee for a concert last weekend and I decided that I should revisit the local natural history museum while I was there. The Milwaukee Public Museum was a childhood favorite of mine- it honestly left a stronger impression on me than the Field Museum, and there is one main reason for that: their incredible life-size reconstructions of prehistoric life. So that is where my focus for this report will be. The fossils on display were mostly casts, and nothing stood out to me as particularly notable. Near the entrance, the museum had a diorama showing paleontologists at work, along with some featherless dromaeosaurs. Nearby, though, they had a reconstruction of one with some plumage on: The first ancient ecosystem you encounter when entering the hall of prehistoric life is the Silurian seas that covered the area. This is an incredible display, teeming with trilobites, crinoids, brachiopods and the enormous orthoconic cephalopods. Up next is a small display of tetrapod evolution- this one spans multiple periods, featuring Ichthyostega in the water and Seymouria on the land. Across from this was the Pennsylvanian coal swamp display case. This one unfortunately was very slightly run-down, with some animals from the accompanying identification key missing. But I still greatly appreciate the detail and care that must have gone into creating it. I especially like the attention to detail in the display, and the inclusion of some smaller animals like the coelacanths in the water. I have to pause here, but I will return with my dramatic and enduring core memory of the museum later, the Mesozoic display!
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From the album: Pawpaw Formation
Lechites comanchensis, Tarrant Co. Albian, Cretaceous Dec, 2022-
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From the album: Pawpaw Formation
Mariella worthensis, Tarrant Co. Albian, Cretaceous Dec, 2022- 1 comment
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From the album: Pawpaw Formation
Scaphites hilli, Tarrant Co. Albian, Cretaceous Dec, 2022-
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I’ve had this forever, I think I found it in Middle TN. I initially thought it was a cephalopod, but I know more now, and I don’t see any septum(s). What say ye? Thanks!
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A couple months ago I took a trip to collect in the Middle Devonian of Iowa. It was a pretty good trip. I found some nice stuff and chatted with some very nice folks. Here are a couple of my finds. A partial ptyctodont tooth plate A neat sponge. I believe the genus is Astraeospongia but please correct me if I'm wrong. I was told these are rare from this area. A partial nautiloid And a partial Eldredgeops norwoodensis
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- cephalopod
- devonian
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Recently I went fossil hunting along a road cut revealing some of the Coburn Formation, latest Ordovician. I was stunned to find that so much of the ecosystem was made up of only Trilobites and Cephalopods. I found trilobites such as Isotelus and Cryptolithus (First picture). My find of the day was a large, very heavy plate of rock that preserves different parts of large Isotelus gigas from multiple individuals, and the circular cross-section of a small cephalopod (Second picture). However, I'm having trouble identifying these cephalopods. In the very few that preserve the outer sell, faint striae can be observed. The septa, when visible, are close together. On some of the smaller specimens, which may be a different species or the same, the uncrushed cross-section reveals what appears to be a small, eccentric siphuncle (Sixth picture). Most specimens, because of their size, are crushed flat. Only much smaller individuals sometimes retain their original shape. Arrows indicate septa unless stated otherwise. The large cephalopods appear similar to both "Michelinoceras" and Geisonoceras tenuistriatum, but this species is restricted to the Whitby formation in Ontario. Could anyone help?
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Uncommon Gastropod from the Ordovician/ Galena (Asgardaspira)
minnbuckeye posted a topic in Fossil ID
I had brought home a piece of Galena/ Ordovician matrix that had some unidentifiable critters hidden in the rock. Time was taken to extract what I am sure is a cephalopod from the matrix. Haven hunted this formation for years, I can honestly say this is the first cephalopod found exhibiting its curved features discovered by me. Attempts to ID the fossil have been fruitless, so I am asking for help! The fossil fractured during its prep revealing what I see as a siphuncle. Here is the repaired specimen:
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Hello all! Recently I have been obsessed with cephalopods and realized there is a real lack of reconstructions of the color patterns on extinct nautiloids and ammonites! This led me to compile a list of known fossil color patterns on cephalopods. After a year of on and off research, I found about 90 species of cephalopods retaining official or undescribed, original patterning on their shells. These are the first 15 species on my list. The color markings are based both on descriptions and photographs of the fossil material. The shades of the markings are based on the fossils, but also inferred. I Hope you will appreciate my work!
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State: Iowa Location: Graf Period: Ordovician Cruised over to Iowa for the first time in years last weekend. I went to observe and scout the famous cephalopod beds in Graf. I have to say, it was everything I had hoped it would be. The wall in which the RC was located upon, was a few hundred meters in length, and contained a few layers, dominated by dolostone, limestone and towards the bottom, phosphatic shales. I ended up finding graptolites too, which I wanted to say were Orthograptus? However I didn't bother to keep any. These were most of my finds, minus the plates I took home as well. Here was the largest hashplate, I feel like slapping this one on my desk due to the sheer chaos it exudes. Here was an unexpected find in the form of three fragmentary trilobite pygidiums. I wasn't aware they could be found here, so I'm unsure of the taxa designation. The funniest about these was I found them all within five minutes of each other. 10/10 would gif gaf up in Graf again. Next time though, I want to see if I can locate some supposed Isotelus fragment beds up near Elgin.
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- graf iowa
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Last weekend I had the opportunity to collect in a quarry in southern Wisconsin. It appeared to cut through the Upper Ordovician Platteville, Decorah, and Galena Formations, although only the Platteville rocks were accessible. It was not the most productive trip but it was a new spot for me and I had a good time. Here's a site shot plus a couple photos of large hash plates I did not collect. The quarry was swarming with these baby frogs – I easily saw several hundred. Here are the finds I kept. Eoleperditia fabulites - giant ostracods A large cephalopod fragment (probably Endoceras) coated with pyrite crystals A nice slab of mollusks, including a very nice example of the curved cephalopod Beloitoceras
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- ordovician
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Last weekend we made a fieldtrip with the “CGH” ( Cercle geologique du Hainaut ) to the quarry “La Couvinoise” , the quarry happens to be in Couvin :p Here the deposits are middle Devonian: Eifelian and Givetian, so a bit older than the locations we usually prospect. The best part for the fossils are the Eifelian deposits, but sadly those layers are no longer in exploitation. However, due to the drought and the low water level we had access to a small but promising scree pile. Here we found a fragmented nautiloid, but the centre of the specimen seemed to be still in the matrix. The prep at home went relatively smooth, the fossil was cracked inside so I had to glue some parts back together, but the separation from the matrix was really smoot. This resulted in my best nautiloid fossil from that time period. As far as the determination goes, comparing it with a few old publications and specimens in the museum in Brussels we probably got a Pleuroncoceras nodosum or a close relative.
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Hello, I’m not very good at this but I was looking for frogs with the kids and found this. I think it is a cephalopod. I found it near Lion’s Head, Ontario, Canada. It is 14-15” in length. Please let me know if this is what it is and approximate age range. Thanks, Matt
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Found on a railroad track with other Paleozoic fossils
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Possible Isotelus piece or coiled cephalopod from St. Leon roadcut
Harrison Smith posted a topic in Fossil ID
I recently went to the famous St. Leon roadcut for the third time. The previous two times were more exploratory with few good finds to speak of, especially in regards to trilobites. I had a much more fruitful time this trip, including 2 complete rollers and 2 and a half prone flexis (my sister found a gorgeous one). I also came across this plate, where I saw the fossil in the bottom middle that is the subject of this post. At first I thought it was part of a coiled cephalopod, which I hadn't found at this site before. The other fossil, that I'm fairly certain to be a cephalopod, on the left in the previous picture also lead to that conclusion. However the plate is also covered in Isotelus pieces, which I am not very familiar with. And from looking at Isotelus specimens, I was wondering if it could be part of the thorax or something. Here are some other pictures of the plate, if there's anything else on it that's interesting, let me know. It's mostly a mash of trilobite and crinoid pieces, with some gastropods mixed in, as far as I can tell.
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- liberty formation
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I found these Ordovician fossils in the Nicolet River formation, could it be cephalopod related?
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New Identification Posters for Common Hamilton Group Cephalopods
Bringing Fossils to Life posted a topic in General Fossil Discussion
I just made new ID posters for Hamilton Group Cephaloods - one for Nautiloids and Bactritoids, and one for ammonoids. The reconstructions are either new or updated for accuracy. Color patterns on the first picture are based on close relatives. If anyone has any suggestions, please let me know - I want these to be as useful as possible.
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Yesterday I finally made it out to one of my favorite hunting spots after (almost exactly) a year away. This road cut in La Salle County Illinois had been visited earlier this year (I believe) by @Nimravis, @aek and @connorp, but I really wanted a crack at it before summer fully kicked in. As I had been warned, it was already heavily overgrown, with poison ivy located intermittently across the slope. There were also mosquitoes in the shady areas and wasps in the sunny ones. However, with some delicate maneuvering I was able to avoid most of the hazards, with only some mosquito bites to show for it. I was at the site from 11:30 to 5:30 and the sun shone bright nearly the entire time, although thankfully an occasional breeze kicked up and cooled things off. Here is a sequence of the path up to the head wall, as you can see it quite brushy at the base of the cut. All in all, I would call it a successful day. I was able to find quite a few interesting mollusks, both gastropod, cephalopod, and bivalve, that I had not encountered before from this site, and a few trilobite bits as well. The real reason I keep coming back to this location, however, is the high-quality and diverse chondrichthyan fauna found here, and it did not disappoint. In addition to many tiny shark bits which may or may not prove to be worth prepping, I found a few larger specimens which I am hoping are all or mostly complete. The trip-maker was this beautiful Deltoptychius: I also shared the site for part of the afternoon with @TheSandStorm, who was making his first visit to the locale- it was a pleasure meeting him. I love seeing new folks getting out to explore and discover the wonders of the fossil world! I will share more pictures of my finds in the next post.
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