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Showing results for tags 'trilobite'.
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Hi, I think this trilobite looks like Phacops smoothops, it's eye facet similar Phacops smoothops eye fomula. But I think the smoothops genal angle is more rounded. So I'm not sure that it is smoothops. Is it smoothops? And, in Phacopidae, if the eye facet is correct, can i specify it, if other features are little different?
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A few days ago I found a nice internal & external mold of a rare Arctinurus sp. This is something I've been looking for over 5 years. I was beginning to give up hope having never even found a pygidium in these rocks. Anyway, I decided it would be good to make some internal/external latex casts and molds and show progress here since I haven't seen much on this topic. I am doing this to observe any differences in the internal/external shells since with this type of preservation the skeletal shells have been dissolved during dolomitic diagenesis. The outer shells could possibly exhibit different features not observable in the internal molds ie. taphonomic or morphological, etc. From making comparisons, I don't think it is A. occidentalis as the anterior border projection is not as pronounced. A. nereus more pustulose and lacks anterior tongue. It more closely resembles A. boltoni but I don't think is reported from this area. So, I guess it is unknown...for now unless @piranha can identify it. First cleaned up with scribe and carefully removed the "tongue" from matrix and superglued in place. This appears to be very easy but actually took many hours. Also not shown is the more complicated prep of the external mold which had to be broken into three pieces and trimmed with a tile saw and then glued together. Set overnight. Aside from the Arctinurus, I also am making latex casts/molds of Dalmanites platycaudatus and a Glyptambon verrucosus cephalon. I don't have a lot of external trilobite molds as they usually break apart and lost in the field. This is also my first attempt at making internal latex molds from externals using hydrocal. I have made latex casts from internals with plaster of Paris but with mixed results as it is softer and more easily broken. For these I want high fidelity examples. Also, I am just winging it. Here, applying a very thin first layer of latex to the external Arctinurus mold. The first 4 or 5 layers need to be very thin and dry between applications. I decided to attach the cephalon /pygidium to the dalmanites with clay and aluminum foil to hold both parts together. to be continued...
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I decided to take a break from house work and the Hadrosaur pubis I'm working on, and prep my first trilobite. It comes from the Wheeler Shale. I'm pretty sure it's an Elrathia kinglii it's missing it's cheeks and some of its head. Here's how it started : And here is how it ended: All in all I'm pretty pleased with how it turned out. I used my Dremel to get close and then my blaster to take the rest of the matrix off. The only hiccup I had was right at the edge of the rock - some of the head blew off and was gone in the blink of an eye. After I was done I was looking at it under my scope, and lo and behold, there was another trilobite I'd totally missed near the cheek! It looks like a little 3mm agnostid trilobite. Luckily I didn't blow it off during prep. I have loads more bones and trilobites to just through, and look forward to showing you guys when I'm done.
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HI! I think this is Reedops pembertoni. Is this right? Pygidium is looks like Reedops, and eye facet is similar Reedops pembertoni. But I'm not sure..
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So I haven't posted for awhile. It is not due to me not going out. But less of a needful thing to post I guess. Anyhow. I figured I would toss some photos in here as I sit and wait, hahaha! Many of these are purchases of some very cool fossils! I hope you enjoy!
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I haven't posted in quite a while, so I thought I would post pics of some of my 2023 prep jobs. I have done a lot more than these but these are the only ones I took a before pic. Zacanthoides idahoensis Cambrian Spence Shale Richmond, Utah Pseudogygites latimarginatus Ordovician Lindsay Formation Bowmanville, Ontario, Canada Ceraurus plattinensis Ordovician Bobcaygeon Fm. Brechin, Ontario, Canada Archimedes wortheni Mississippian Warsaw Fm. Fenton, Missouri Platycrinites bozemanensis Missisippian Lodgepole Fm. Bozeman, Montana Aphelecrinus okawensis Mississippian Bangor Fm. Lacon, Alabama Glyptocystites multiporus Ordovician Bobcaygeon Fm. Brechin, Ontario, Canada Eldredgeops crassituberculata Devonian Silica Shale Paulding, Ohio This is one I really wish I had a before prep pic. The specimen underneath was a complete surprise.
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Is this Drotops armatus real?
A.Passero posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hey everyone, I just wanted to see what you guys thought of this Drotops. I know they are commonly faked and the lacquer job on this specimen isn't the best. Let me know what you think, I can take more pictures if you want.
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Isotelus trilobite
Georgemckenzie posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hiya everyone someone’s selling a trilobite, but hasn’t got a name or locality, normally I can tell straight away if a trilobite is real but the pictures aren’t the best and it’s like no trilobite I’ve seen, not sure if it’s a replica or a fake made to look like a isotelus.
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Microtrilobites and Other Microfossils of the Pooleville Member
Isotelus2883 posted a topic in Micro-paleontology
Recently I acquired some microfossil matrix from the Bromide Formation, in Oklahoma. They were of the Pooleville and Mountain Lake Members, containing a very diverse fauna, mostly bryozoans and crinoid arm fragments. While searching through the matrix, my main aim was to find some of the small and young trilobites that are often found here. Also, I had bought a trilobite meraspis previously, from the same locality. It is an enrolled meraspis of a Lonchodomas mcgeheei, from the Pooleville member. Views of the Cephalon and pygidium.  Now, here are the finds. A Cyclospira parva, these were very common and found in all samples of the Pooleville Mbr. These are the trilobites of the Lower Pooleville. What may be a partial Lonchodomas mcgeheei pygidium. It is more likely a brachiopod fragment, however. A proetid free cheek, I think. This one is more likely to be a Homotelus bromidensis cheek. I'm not sure for this cheek. Eoceraurus? Here are the trilobites of the Middle Pooleville Member. Calliops armatus partial pygidium.It is rather fragmented, as sadly most of the microfossils in this material are. This may be a trilobite pygidium, but it seems now that I look at it, it may be a brachiopod. Now here is one of my better finds from the matrix. It is a partial trilobite, with the hypostome in place, unusually. Because the dorsal side is not preserved, I don't know what species it is. Here are the fossils of the Upper Pooleville Member. A picture of some of what I found in the sample. A healthy sized proetid free cheek. Two partial cephalons of Frencrinurus capitonis. Though partial, they still show exquisite detail, including several sharp spines. Last, there is this specimen. I am hoping it is a protaspis of some trilobite, but... Yeah. Doesn't look like it. These samples gave a clear picture of the Bromide Formation, and they were rich with fossil fragments, an excellent test for my microscope.
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From the album: Trilobites
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From the album: My trilobites
this is an Isotelus maximus From Mt Orab, Ohio Arnheim Fm. Part of the head shield has been restored. -
UPDATE: Consolidated all my loose preparation threads into one topic. Four hours so far into this big bug, and maybe another two to go. Found at Penn Dixie this past weekend, the visible area measures 6 cm. With the pygidium, it likely measured about 8+ cm. Judging by its size and pustular sculpture, this was likely a long-lived specimen prior to burial. This is how it looked fresh in the field:
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Trilobite Fossil real or fake?
Toast123 posted a topic in Is It Real? How to Recognize Fossil Fabrications
It was collected from Bou Dib Formation near Mrakib. Im wondering if they are authentic or fake. Why is the stone they’re on a different color than the rest of the rock?
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I was hoping to put together a little display of the stages of a trilobite. I needed help being sure of the earlier stages. I have found drawing of the earliest stages but not photos. There have been many circles bits found but they have been bigger then the mini trilobites I've find. As well the ones I've found that are little circles with center parts, can be hard to tell if its just 1 segment of a Peronopsis Interstricta. Had a few photos. See if they maybe right for the early stages. Thanks for any help. #1 #2 #2(closer)
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Hello everyone! I'm typically a Cretaceous collector but spent the last month in Long Beach Island (LBI) New Jersey so I figured while I'm there, I would do some serious collecting. These fossils are glacier deposited Paleozoic specimens. Overall, I probably spent around 30 hours collecting. My biggest surprise was the trilobite imprint (picture 1) however, I was also pleasantly surprised by the number of crystalized/geode specimens. Here my my favorites from the trip.
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From the album: My trilobites
This is a Dalmanites limulurus From the Rochester shale Middleport NY. I bought this one from a friend it is probably my best trilobite.- 1 comment
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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've stumbled upon several hundreds of these fossils of I believe limestone formation. I really don't know a whole lot about fossils. Just what I've been reading online. Can I get a time period of what y'all think these may be from. Found in East Texas.
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From the album: My trilobites
A stacked Eldredgeops milleri from Sylvania Ohio. This one was prepped with RockQuat as well as normal means which made the rock softer and that's why it looks different.-
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This reedops from Jebel Oufatene, Morocco. I think it is not bronni, cephalotes, pembertoni. What is this?? Please classify this Reedops... thank you...
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From the album: Oklahoma Paleozoic Fossil Finds
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From the album: Mahantango Formation
enrolled Greenops boothi Perry County, Pennsylvania- 3 comments
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Making replicas of my fossils has always been something very interesting to me, but for the longest time I wasn't sure about how it should be done, casting although it could preserve a lot of detail can be pricy if you want to make replicas of multiple different fossils and it is something that I am just very unfamiliar with. From that point my attention turned to 3d printing as this technology can allow us to replicate objects fairly inexpensively, but when I started to looking at 3d scanning for actually making the models I found that scanners were not all too cheap either ranging from about 500 dollars into the thousands. This is when I discovered photogrammetry, which allows you to make 3d models of objects with just a number of regular photographs taken from different angles, no need for expensive tools to scan the object. I found a free program called 3DF Zephyr that allows me to upload up to 50 pictures of a certain item and construct a 3d model from them. Yesterday I installed the program and immediately went to find one of my fossils that would be good to start off with, I wanted something where I wouldn't need to scan it from the bottom and something with good surface that would work well with the software. I thought that my Flexicalymene ouzergui from Morocco should be perfect for this. I read that you should take pictures so that every desired point of the object is seen from at least 3 different angles and so I took the bug and started doing that, I used 3 different elevations for the camera and rotated the bug taken pictures from many different angles, I ended up with a total of 45 photos. I then uploaded all of these directly into the software and it used all but 1 photo. It took a few hours to construct point clouds of a bunch of different points on the bug and some time after to reconstruct a mesh from that. What I ended up with looked pretty good and I was really happy with it for my first attempt, especially since I have heard that it may take several for you to get the model looking correct but nonetheless there were some issues with weird floating geometry around the bug. To address that I first selected everything disconnected from the model and removed that, then I took a lasso tool to select and remove all of the blobs attached to the bug that I didn't need. Here is what the model looked like before and after this: Now I saved the mesh as an OBJ and brought it into a different program to fix all the holes in it, make it solid instead of just the hollow shell I got from the scan and smooth over certain parts. This step was very successful and the model looked great, now it was time to print it. I took it into the next program to scale it properly and slice it for printing, I scales it roughly to the same size of the original bug and added all the needed parts to print it. The first print got disconnected and failed but then I made some slight changes to the model and leveled out the print bed, after that it was very late and I went to sleep but woke up today to a perfect copy of my Trilobite, it had some supports holding it up which were a bit reluctant to disconnect but after a bit of cleanup it looked great. Here is the finished print alongside the original: This has been a really fun thing to try out and now I want to do it with some more fossils, I think the next one I am going to try will be a small crinoid and then a more challenging model like a brachiopod where I will need to do some processing with photos as I will be taking pictures from all sides of the object. I encourage anyone interested to try it for themselves, if you want any help or additional information as to how I did certain things here I would be happy to discuss that with you. Thank you for looking, Misha
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From the album: Mississippian fossils
A bit weathered, but still a nice ventral example of this species.- 2 comments
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Ventral Ameropiltonia lauradanae trilobite
Collector9658 posted a gallery image in Member Collections
From the album: Mississippian fossils
A nice ventral Ameropiltonia trilobite.-
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