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  1. minnbuckeye

    Placoderm Possibility??

    This past weekend, I had the pleasure of hunting with my rock club in central Iowa. I found what I think is placoderm, though there was multiple opinions given to me. Nothing earth shattering, but exciting for me! Can you help clarify the ID of the specimens? The last piece broke revealing more "placoderm" inside.
  2. dinosaur man

    Placoderm or Onychodontid?

    I recently discovered this in the Devonian Onondaga Formation of Ontario and am thinking it’s either a Placoderm or a Onychodontid based off the armour like texture which does not match any coral in the formation, their is also the presence of odd spine like structures. Any idea if it is one of these species?
  3. Mahnmut

    Somewhat fishy

    Ahoi, I just finished a model of Dunkleosteus the lazy way, because I don´t have that much time these days. Lazy way means: Skull is a bought model from kaiyodo dinotales, postcranial is a skeletal drawing by Scott Hartmann I modified slightly and printed on some transparent foil. Like the outcome. It is quite small though, only 15 cm, representing a meager 3m in my chosen scale. can anyone tell what the other two are? both recent species, one handmade after a photograph, the other 3d printed from ct data. As I don´t know if I can add tags after posting
  4. Hello. I was wondering if I could get some opinions on the authenticity of this Dunkleosteus jaw. The jaw is coming from the Devonian of Morocco. It measures 12" long by 4" tall. The seller indicates that only the tip of the jaw was restored, but I suspect that the restoration may extend further. Thank you for your help. @Mioplosus_Lover24 Care to weigh in? Thanks.
  5. fossilzz

    Arkona placoderm?

    I was wondering if a complete or fairly complete placoderm skull/head has ever been found at Arkona? I am just curious as what this would look like, and because I have a few placoderm bits and pieces myself, pictures of such a fossil could possibly help me to figure out where these pieces came from. (This is mostly out of curiosity though because I know small placoderm bits are basically impossible to identify)
  6. Back during an April trip to the Widder Formation (Mid-Devonian), I came upon a rather sizeable placoderm. It is very likely the arthrodire, Protitanichthys sp., although it is a bit of wastebasket taxon, but new research is underway. It was pretty much stuck in this rock, and it was only going to come out the hard way. I collected every little bit I could find from that dirty, messy bench, including the impression. Here is the in situ photo:
  7. This is continuing the first post. The Tioga site is a near shore exposure of the entire Catskill formation. So besides the general Holoptychius and bothriolepis fauna, lungfish have been described from a skull table and tooth plates. Here is a tooth plate from Dipterous fliescheri. A similar plate was described from the Troy, PA area.
  8. Hello everyone! I have recently purchased this skull roof from an actinolepid placoderm from the lower Devonian of Ukraine, The fossil was labelled as Kujdanowiaspis, but there is also a closely related genus found there called Erikaspis. I have been looking at several papers to try and see what distinguishes the two and if it is possible to tell what mine is but right now I am not sure. Any help identifying the genus and even species if possible would be great, Thank you
  9. oilshale

    Millerosteus minor Miller, 1858

    From the album: Vertebrates

    Millerosteus minor Miller, 1858 Middle Devonian Eifelian Caithness Scotland Millerosteus minor (named after Hugh Miller, a Scottish geologist and paleontologist 1802-1856) was a small arthrodire placoderm, rarely exceeding 15cm. The extinct armored fishes known as placoderms make up what is considered to be the earliest branch of the gnathostome family tree -- the earliest branch of the jawed fishes. Arthrodires possessed jaws but no teeth. Razor-sharp bony dental plates formed sort of a beak and allowed to gnaw on prey. Arthrodires (“jointed nec
  10. dinosaur man

    Placoderm bones/armour?

    Hi is there any possible way this could be pieces of Placoderm armour or bones? There very different from what I usually find in the area and seem to be vertebrate in origin if it’s not geologic.
  11. fossilzz

    Small placoderm or fish

    So I found these bones in a block of Bois Blanc fm., which dates this to around the middle Devonian. When it was found the block was in several pieces which at the time I didn't realize was associated, but upon further inspection I found the pieces fit together. Interestingly the fossils are not layered and appear at random depths throughout the block, not just in one layer. Because of this I think there may be more to be discovered in the rock. I tried prepping a smaller bone fragment out, but it turns out the bone is much softer than the matrix and the bone fragment is now many fragments. I
  12. We thought sharks' cartilaginous skeletons existed because endochondral bone evolved after sharks branched off the family tree, but this Placoderm common ancestor of sharks and bony fishes has bone. This indicates that sharks may have lost the ability to make endochondral bone. https://phys.org/news/2020-09-ancient-bony-fish-rethink-sharks.html
  13. Just got back from a 5 day trip to western NSW where we visited a number of sites, some of which we had not visited before. Will post more photos and information over the next few days as I have a lot to photograph, but here are some field shots from day two (our first collecting day)... Our first site was located near Grenfell and is known for its excellent Devonian fish fauna, including placoderms and sarcopterygians. While not as well preserved as the nearby Canowindra site, these are collectable which is a start . We were only given a vague site on a hillside located on private
  14. Manticocerasman

    Fishing in the Devonian

    Last weekend we were invited by a few friends to joint hem on a fieldtrip in Famennian ( Late Devonian ) deposits in Belgium. They sometimes visit this place specifically to look for Devonian plant material. Although paleobatany is not our cup of tea they convinced us to come along because they had also found fish remains from time to time, so we tagged along in the hope to find some Devonian fish. At first we didn’t find much apart from the plant material, but one of our friends led us to a boulder where he had seen some fish scales on a previous visit. And indeed, after closer
  15. cameronsfossilcollection

    Placoderm material from New York?

    Found this nice slate blue piece in my recent trip to Western New York. What do you guys think? The piece isn’t very big, maybe half an inch - but it looks relatively thick, maybe a centimeter and a half?
  16. Today on a hunt in the lower devonian of new york, I found on of the most unusual piece and I can't decide if its bryzoan or possible placoderm.
  17. BenWorrell

    Placoderm Fish with Fin?

    I found this fossil in Devonian rock in Johnson County, Iowa. I think it is a fossil of a placoderm fish, and I think it has a "fin" next to the quarter in the photo. The fin would be coming out of the placoderm plate at a perpendicular angle, which would make sense, but I have never found a fin before. I will attach a close-up photo of the "fin" below. Am I on the right track or is this something else? Thank you! Ben
  18. Mioplosus_Lover24

    Unknown Acquisition

    I bought a small fossil collection that contained several Erismatopterus levatus and it also contained several unidentifiable and unlabeled items, in particular this piece. It reminds me almost of a placoderm skull plate, but I honestly don't have any idea. There's area of denticles on the side of the fossil.
  19. cl8n

    Devonian placoderm?

    Hi all! I pulled this fossil out of Red Hill, a Devonian site in central Pennsylvania. I thought it looks like it could possibly be part of a placoderm but I’d love to get some help with further identification. Thanks in advance!
  20. Leicester Pyrite Member. This layer between the Windom and the Geneseo black shale represents a sea of death. I find very few types of fossils in this hard to process layer of solid pyrite. Well preserved cephalopods and Placoderm armor (Placodermi is a class of armored prehistoric fish) are the most common fossils found. This very thin horizon can be easily found in the outcrop if you just look for rust dripping down and staining the grey shales below this pyrite layer. Every year or two, a piece of Leicester Pyrite will fall from its position high up in the outcrop and slide dow
  21. The Jersey Devil

    Schoharie quarry devonian - placoderm?

    Hey everyone, I am curious if this is a placoderm armor plate. It is from Schoharie quarry, NY. Thanks.
  22. Can this be identified as Dunkleosteus? It's from Ashtabula, Ohio on auction site.
  23. Found the usual goodies at Paulding today. But I'll only show this photo of a nice, thick chunk of Placoderm armor. This is embedded in hard limestone, so I think it's from the underlying Dundee Limestone Fm., rather than the Silica Shale Fm. (For those unfamiliar with the Paulding Locality, these are quarry dump piles). This is one of two placoderm pieces I found today. The color alone makes this a desirable find, let alone the cool factor of what it is.
  24. JimTh

    Bone piece from Penn Dixie

    I had a chance to visit Penn-Dixie today and one of my first finds stumped me. It has the signature porous inside of a bone. It’s black. It has radiating lines down one side. Folks running the place thought it was likely a piece a placoderm armor, making it a rare find. Apologies for the pictures. Once again I find myself in a hotel with my phone. Thickness is a bit over a quarter inch. Length is around 1.75”. Couldn’t make the phone focus well on the marrow. Does placoderm armor have marrow?
  25. It's been about five months since I've been able to get out and dig, so when my collecting comrade and I arranged it, off we went. The weather was perfect, although it was muddy going. Spent about a day and a half at our site. Finds were not the best for some species, but the focus was more on site preparation. Pictured here are some Greenops widderensis. Both are missing parts, so will likely be in the grafting pile:
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