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Hi everyone! I visited an exposure of the Milwaukee formation within Milwaukee city, Wisconsin this weekend. Found lots of brachiopods, corals and bryozoans, and brought some rocks home. Then today I decided to smack some of them with a hammer - and this trilobite pygidium emerged out of nowhere. I don’t know a lot about inverts - can anyone help with the ID please, if it’s identifiable at all? I’m pretty sure it is from the Lindwurm member of the Milwaukee formation (Givetian - Middle Devonian). Thanks!
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From the album: Fossildude's Silurian New York Finds.
Calymene niagarensis pygidium. Rochester Shale, Lewiston Member. Lockport, NY.© 2023 T. Jones
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Back again in need of a Devonian diagnosis. A Devonagnosis. Whose butt is this? First thought was Kettneraspis except that it has those three vertical spines lined up at the anterior edge, broken off in the mold when the rock was opened. Also the multitude of tiny spines around the edge appear to be intact and much shorter. It’s maybe 5mm across, not very big. Needmore formation of West Virginia, middle Devonian. First photos are interior mold, last few are exterior mold. As always, thanks for you times.
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The Presence or Absence of Lateral Denticulations on the Pygidium of Acastella tiro
Isotelus2883 posted a topic in Fossil ID
In connection to a school project, I asked my dad if he could buy me this representative trilobite of Ukraine, as I wrote a little bit on the trilobites of the Silurian-Devonian boundary there. The problem is that the label is probably wrong as Acastella is not found in the Lower Silurian, and searches of the locality in which the trilobite was supposedly found had no results. I think it is much more likely that the trilobite was found in the Borschiv Horizon, around Podolia, as the shell preservation and trilobite looks similar. The question I have though, is: does Acastella tiro have denticulations on its pygidium, or is that A. heberti? A paper on the trilobites of the Iberian Chains says that A. tiro has denticulations on its pygidium, yet a paper on the trilobites of Arctic North America says that is distinct to A. heberti. I would greatly appreciate any information. 1. Acastella tiro and A. heberti form the Iberian Chain 2. From North America 3. My own little specimen, which I am unsure of what species it is. -
Trilobite pygidium broken before fossilization?
Raistlin posted a topic in General Fossil Discussion
So while prepping this pygidium I started to notice stuff was missing. More so than the normal. This pygidium seems to have split in half. Could it possibly be predator leftovers or something similar? Adding prep pics to see what I was seeing and show I did not cause yhe damage.- 15 replies
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- half pygidium
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Used a sewing needle and acid (water and 45% vinegar mix) to prep this due to size. Never used to technique before and finished it off with Paleobond. Did it come out ok? I had no choice but to Paleobond as I loosened a part of the cheek spike while prepping. The pygidium is 8mm long and 10 mm wide. Mississippian Golconda formation.
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At first I thought this was the Trochurus pygidium. I've been looking for for a few years now, but since it appears to have 6 spines instead of 4, not so sure. Maybe Ceratocephala? Sugar Run. @piranha
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Hello again everyone, sorry for the delay between Part 1 and Part 2. I went through some more material from DSR and I've made some pretty awesome finds. I might have enough specimens for a Part 3, but I still have to go through more material. The same goes for the Penn Dixie part, I've barely touched it yet and still need to photograph the finds. To kick Part 2 off, here is my best DSR find yet! A nearly complete (unfortunately disarticulated) Echinocaris punctata!!! My kitten Indy for scale The Echinocaris has one of the spikes on its tail visible, and both valves are present. Another Phyllocarid, a Rhinocaris columbina! The reverse side shows another half, possibly from the same Rhinocaris? This cute little cephalon is one of my first Eldredgeops finds at DSR. Here's the Dipleura heads I've found so far (excluding the one from the previous trip report), This one is one of the largest I've found yet, it's 3 inches wide! This cephalon was a real heartbreaker. The other half of it was stuck under 1 1/2 - 2 feet of overburden This one is upside down I think this is a juvenile Dipleura cephalon, but I'm not 100% sure. I'll have to clean it up to be sure. Now onto the misc finds This is one of the largest Goniatites(?) I've found here, it popped out of the matrix on the way home but it should be able to be glued back. I feel like the cone shaped fossil in the center of the piece might be a Hyolith, but I don't know for sure. A lone crinoid stem, it'd be cool to see what it looks like when prepped. Not sure what kind of fossil this is, possibly a devonian putty scraper? Here's some Brachs and Bivalves from DSR, I'm not 100% sure on the ID's so if I'm wrong please correct me on it. Goniophora chemungensis? Paraspirifer acuminatus? Mucrospirifer consobrinus? Big jumble of brachs (maybe some Bivalves too?), cool golden sheen on it. I don't think it's pyritization. Assorted brachs Devonochetes coronatus? This is on the back of the possible Hyolith piece shown above. M. mucronatus? Large brachiopod and bivalve hash plate Probably the biggest Bivalve I've ever seen, let alone found. ID unknown Orthonota undulata
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Moroccan Trilobite Scabriscutellum developmentally abnormal pygidium
Biotalker posted a topic in General Fossil Discussion
Something caught my eye at the cheap table of trilobites at a Moroccan vender at a past fossil show. There were several Scabriscutellum of mediocre quality but I bought two. You can see them here. I am pretty certain these fossils are legit. One seems to have to have a clear cleft in the pygidium. There is even a small overlap of one pygidial "lobe" over the other. This is the first time I have seen such a "dramatic" mutation. I would guess that it is far more likely to be a developmental issue rather then a genetic mutation. The cleft trilobite obviously survived to its current size just fine (both approx. 4cm or 1.5 inches long). What do you think? Has anyone seen similar mutations within a species?- 9 replies
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This trilobite pygidium was found in a talus slope at base of Fossil Mountain in Western Utah. As you can see it is quite weathered. I found it about 25 years ago when my mom and I went back country driving in my Ford Tempo lol. That car went into a number of not car friendly areas haha. From what I know of area geology I believe it would be Ordovician in age
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Hi - this is my first post to this group. I found this partial trilobite fossil this past summer in Ordovician limestone near Eganville, Ontario, Canada and I am hoping that someone here can help me identify the trilobite species it belongs to. This piece measures 3.5 inches in length by a little over 2.5 inches wide and I believe it is the pygidium and most of the thorax (so a little more than half of the full trilobite). Also, it has a little over 1/2 inch in depth, so it is not completely crushed flat. I would have much rather found a full trilobite - and I do have a full trilobite that I found that I am having prepped, that I will post at a later date - but I am very happy with the size and condition of this sample. I broke it out of the rock in this condition - no prepping has been done to this sample. Any thoughts?
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Hi again! Found this trilobite cephalon today with what looks like a pygidium under the glabella. Not sure of the species yet, is this a pygidium that got preserved under the glabella or is this possibly the internal structure?
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I recently broke open a few slabs of rock I took home with me from Rickard Hill Road in Schoharie the last time I was there. The rock was very crystalline and hard to break and there weren’t a ton of fossils inside. I did manage to find a couple of trilo-bits that were very well preserved and very detailed. One of these bits I’m having a bit of trouble identifying. I’m almost certain it’s a trilobite pygidium but it looks like nothing I’ve ever seen before. The great preservation makes the details of the shell stand out. It is around 1cm long and wide.
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From the album: Lower Devonian Helderberg Group in Eastern NY
Dalmanites pleuroptyx? Lower Devonian Helderberg Gr. Kalkberg Fm. Rickard Hill Road Schoharie, NY Collected 5/31/20-
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Hi everyone, I am very new to fossil hunting and am hoping to find some trilobites. I am located in along Lake Huron in Ontario, Canada on a rock formation from the middle Devonian period. I broke open a rock on my second trip and found this but I am not positive what it is. I think it could be a fossilized pygidium from a trilobite but i am really just guessing. I have attached to photos of the fossil, if anybody could help me identify it or steer me in the right direction that would be greatly appreciated. Thanks.
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Unknown Rare New York Trilobite Pygidium Undescribed??? Lichid?
Kurufossils posted a topic in Fossil ID
Today on a hunt I found on of the most unusual trilobite pygidiums I've ever seen from new york and cannot find anything out there to compare it to. Unfortunately the site is imported material from an unknown quarry upstate so all I do know is that its from the Devonian of New York based on other material found there, unfortunately I cannot attach a formation to this one. Also its also fragile and a very partial piece thats unpreped, I think its a ventral display. This maybe a head scratcher so maybe the trilobite experts here can help weigh in on what this can possibly be. -
Good morning all! A couple successful days of collecting and to my amazement, two trilobite pygidiums!. My amateurish guess is Ameura missourensis? It was found in Kansas City in a Winterset limestone outcropping. When I looked closer, there is something I thought could be part of the cephalon or some other fossil in the second photo about 12:00? Not sure if I should pursue cleaning it (and don't know how )-thoughts appreciated! Bone
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Hi forum friends. Cleaning out the back of my pick-up, I noticed this pygidium. It looks a lot like the eldredgeops I commonly find here but has a distinctly high ridge along the centerline. Could be just a molt that was "pinched" upward by the sides ? or possibly something different Cheers .... and thanks,
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Do any of our trilobite experts know what this pygidium belongs to? It's Cambrian from Jingxi, Guangxi, China. It's incomplete measurements are 25 x 27mm. Help!
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So the new house and work have keep me way busier than I had expect. I finally got around to getting my prep room set up for the most part and got around to starting some prep. Here's what I started with. Then the progress of getting it there. I had an oopsie as my engraver kinda got away from me doing some damage. Finally I finished it off with a clear matte finish to help stabilize it and make it pop against the matrix.
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I found this pygidium the other day in the Silurian Racine formation near Chicago, wondering if any trilobite specialists can help with species ID? I'm thinking Illaenus ioxus (is that current nomenclature?)but not sure. Thanks for any help.
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Hey fossil folks, I’ve been very busy lately moving into my new house and planning my wedding (8/9/19 is the big day) so I haven’t had a chance to report on a few recent trips. In the beginning of July I got some nice fossil hunting in...I went to Cole Hill Rd, DSR and Briggs rd but I’ll post the latter at another time if I get the chance. This is just a short and sweet trip report for Cole Hill Rd from Friday July 5th. I got out of work slightly early and made the quick 40 minute drive to the site. I hunted from about 545-8pm. I decided I would try to move some overburden and see if the rock was weathered below....I did a lot of work only to struggle moving the rock. Maybe the winter will loosen it up. I did end up finding a little spot with rock that was more “movable” and I had a little hot streak of parts and pieces. Nothing articulated but some nice cephalons and pygidiums. Heres some of the better Cephalons (sorry I missed the scale bar!!) plus a few body segments I found. The one at the bottom right is probably the best one but is covered by a brach. It looks like I could smack it with a hammer and pop it off but I’m going to wait for better equipment. I like the detail on this partial cephalon. Heres a line up of the better pygidiums I found. I really like the dipleura pygidiums because you can usually see faint evidence where the pygidium used to be more segmented as a juvenile. Kinda neat. Can’t ignore the associated fauna....some nice bivalves, a Gastropoda and a small cephalopod. That’s it for this trip. I still really want to find that “wow” specimen but I’ll have to pay my dues. It’s a very difficult outcrop to work, at least for me. Glad I found some nice partials, my last trip wasn’t as successful. I ended up going to DSR and Briggs rd the next day on July 6th and did decent. I had a really excellent find at Briggs rd I want to share so as I get the time I’ll try to post my fossil hunt from July 6th. Thanks for reading Al
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