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Showing results for tags 'cephalopod'.
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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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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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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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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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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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The Devonian period is known as "The Age of Fish", but could also be known as "The Age of Brachiopods." In the Early / Lower Devonian, brachiopods reached the height of their diversity towards its end in the Emsian. We see the ancestral groups occurring, lingulids, craniids, orthids, protorthids, pentamerids, rhynchonellids and strophomenids, as well as the later successful groups we have seen before such as atrypids, athyrids and orthotetids, plus the rise of spiriferids, spiriferinids and productids and the beginning of the terebratulids. By the end of the Devonian , several of these groups are extinct or severely reduced in importance and brachiopods never quite recover. Also, the Devonian is the last time we see trilobites with such variation, large sizes and numbers and orthocerids too are much more uncommon after the rise of the goniatites. The massive tabulate coral reefs also disappear after the Devonian. Fascinating period and I hope to share some of its wonders with you. Equally, a lot of this is rather new to me, so I would be very grateful for any assistance, corrections or further information on my specimens. Thank you. The Early Devonian epoch is split into three stages, so let's start with the first of those, the Lochkovian, that began about 419 mya and finished roughly 411 mya. I have been sent a nice selection of brachiopods from the Kalkberg Formation, Helderberg Group by the Mighty @Misha, mostly. But the kind gentleperson also sent me this fascinating little bryozoan hash : It is dominated by fenestellids, which is usually the case in the Devonian, but other orders sill occur. These ones, I think, are Fenestella, but there are so many species in the formation that I wont take a guess as to species : Not sure what this one is ;
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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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Hi everyone! I just got back from a trip to Penn Dixie Fossil Park near Buffalo, New York, and found some pyritized cephalopod fossils. Penn Dixie has rocks form the Givetian of the Devonian from the Hamilton Group. A young ammonoid is easily identified as Tornoceras uniangulare, but the other orthoconic fossils are harder to ID. I am pretty sure the small but more complete one is a Bactrites, because the siphuncle appears to be almost ventral, the distance between the septa, and the slightly slanted suture (after looking at Ludwigia's). The preserved shell is very smooth and couldn't be from a Spyroceras that are also found at Penn Dixie. Similar fossils to mine are pictured on their website, unidentified. If any more pictures are needed, I will try to take them. I wanted some expert advice before concluding it is a Bactrites. Can anyone help?
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Found this fossil in an agate of unknown age from a gravel pit ...
SilurianSalamander posted a topic in Fossil ID
I think it looks shockingly similar to charnia. Maybe a cephalopod, snail, or plant? What could it be?
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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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What is the stratigraphic and paleogeographic range of Whitfieldoceras?
siteseer posted a topic in Questions & Answers
One of my friends has a Whitfieldoceras specimen from the Ordovician of Wisconsin. He asked me if I knew anything more about it. I didn't and didn't see much online. Does it have a record outside the Ordovician? Is it found elsewhere in the U.S./the world? I have the same question about Beloitoceras. He has one of those from the same site. I think I have one from a Minnesota site somewhere but couldn't find it. Is it known from elsewhere and did it survive beyond the Ordovician? Thanks, Jess -
From the album: Westphalian cretaceous fossils
In southern munsterland basin it is sometimes possible to dig in cenomanian sediments. Fossils are rare, but sometimes real beauties like this fine, 4 cm "big" Nautiloide Pseudocenoceras-
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Hi guys, I bought this ammonite at antique store, It measures 25 CM. Could anyone help me ID the fossil? Baja California, México. It could be pachydiscus? Thank you! Best regards!
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Went on a little "Easter Egg Hunt" with my folks, found some excellent fossils. day was hot but I enjoyed it. I have provided my best ID, but please feel free to correct if you can identify it further! it helps with my labeling system for sure. this lizard was good luck right next to where my mom was standing i noticed this beauty sticking out of the rock further excavation revealed this possible horn coral? eldredgeops rana heads trilobite glabellar fold ( possibly Odontocephalus?) Dipleura rib impression (Very exciting to have found 3 species in one trip!) amonoid Cephalopod Agoniatites vaxunemi (note the preservation of the sutre lines). and here is a conularid i found as well Possible pelecypod? brachiopods and lastly a couple of crinoid buttons dug out of the rock
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From the album: Camille's fossils - Georgian Bay Formation
Field collection by Camille Martin, April 4, 2022 The fossil offers a bit of an interior view of the cephalopod.© Camille Martin
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