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Found 39 results

  1. 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?
  2. 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 won't "prep" any more of this to avoid further damage but I was wondering if there was anything diagnostic in here?
  3. 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.
  4. 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
  5. 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.
  6. 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!
  7. 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 down to the creeks edge. It takes a lot of work to process the pyrite for fossils. Every blow with your hammer delivers the strong smell of sulfur and a ton of sparks. The reward for all this patience and hard work are fossils preserved in brilliant fools gold. This unit is also the only rocks in my area that routinely contain the armor of Placoderm fish. Click this link for a detailed description of this unusual formation - http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.835.6976&rep=rep1&type=pdf&fbclid=IwAR0qdFymJq-Hd1_SqU3j3yDw5Trl0ih_KohTv-26Du3b1m9g9s2IYKlW0Xc
  8. Schoharie quarry devonian - placoderm?

    Hey everyone, I am curious if this is a placoderm armor plate. It is from Schoharie quarry, NY. Thanks.
  9. 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)
  10. Can this be identified as Dunkleosteus? It's from Ashtabula, Ohio on auction site.
  11. 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.
  12. Paulding, OH (Dev.) 7/28/19

    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.
  13. 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?
  14. 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:
  15. 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:
  16. Although we are currently in the depths of February, spring is just around the corner! With spring comes spring break and a week of digging!! One of the locations I am planning a visit to is Jamesville quarry in Jamesville NY. I would love to unearth some nice placoderm pieces. If anybody has info about the site, especially who to contact for permission, I'd greatly appreciate it!
  17. 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 , I just added the ones I may put in this thread if I ever find the time to build them. After all my Whales, other marine Mammals , Birds and Reptiles I thought it would be nice if I could include some more Reptiles and "Amphibians" (?) If it crossed the border between land and sea, its likeness shall be built by me -some day. -Placodus -Cyamodus -Mastodonsaurus -Tiktaalik -Ichthyostega -Diplocaulus Aloha, J
  18. Dunkleosteus armor/possible jaws

    From the album Sharks and fish

    Front side of armor which I believe could be the edge of the jaws! It comes to what would have been the razor sharp shearing edge, greatly worn down now, though. I also believe it could be the jaw because of the clear vertical wear lines on the surface, from being sheared against the inner surface of the other jaw, which is how they kept the edges razor sharp like scissors. I have seen similar wear lines on placoderm shearing jaws, so what I believe to be reasonable observations point to the possibility(maybe even likely?)of being from the cutting edge of the jaws.
  19. Dunkleosteus armor cross section

    From the album Sharks and fish

    Cross section of dunkleosteus' armor plate showing internal structure of mostly solid bone
  20. Dunkleosteus armor

    From the album Sharks and fish

    Part of dunkleosteus' amazing armored head
  21. Hi Folks, A couple of weeks ago we went on a 5 day trip around NSW to find a few different fossils which I'll post another day, but here are some of our best finds from near Cowra, NSW Australia. So in a nutshell, there's a quarry near Cowra that was quarried to be used as road base in the area, and thats how these specimens were found. You can find blocks of the stuff on the side of the road if you're lucky. Since you can't get into the quarry nowadays because the owner has pretty much lost the plot this is the only way to collect material. #1 Cowralepis mclachlani. This is one of a few species of fish at the site and is by far the most common. We have never found any other species there. Continued...
  22. Last Sunday we had a trip to the sandy quarry near St. Petersburg. Near of the sandy quarry there is a small village called "Novinka" (coordinates of this place on Google maps: 59.161362, 30.380684) Quarry near Novinka is a fairly large quarry, developed in the sands, introduced here in the Devonian (about 400 million years ago). The quarry is very picturesque and extremely interesting, there are mottled sands with a great variety of sedimentary textures deposited in various water conditions. During most of the Devonian Period, North America, Greenland, and Europe were united into a single Northern Hemisphere landmass, a minor supercontinent called Laurussia or Euramerica. We can say that the North America, Greenland and the north-western part of Russia were one territory. Here you can find many fossils of armoured prehistoric fish, as well as their teeth. A lot of paleo tourists from different countries come here in search of placoderms. We have a friend-professor of geology at the University of St. Petersburg. He said that last year a student from Japan went home with a necklace from the teeth of a armoured prehistoric fish. It was a very big paleontological luck. Next to the sand quarry are special designs for sifting sand. Large parts go in one direction, and fine sand in another. On photo few pieces of the shell of the fish (Asterolepis), which we found in 1 hour, and rock layers in sandy quarry. (Asterolepis is an extinct genus of antiarch placoderms from the Devonian of North and South America and Europe. They were heavily armored flat-headed benthic detritivores with distinctive jointed limb-like pectoral fins and hollow spine. The armor plate gives the Asterolepis a box-like shape. Its pectoral fins are also armored but the caudal and dorsal fin are not. The first fossils were named after M. Eichwald in 1840 after not star-like markings on the fossils.)
  23. Went out to Iowa for a Devonian hunt. Found a few placoderm teeth and what I'm told is a Dunkleosteus jaw/tooth bit. I'm happy. Can't wait to go back this Fall. I also found some nice crystals, pyrite and partial trilobites. Placoderm material Anyone know what this is from? My best guess is possible shark tooth.....? Dunkleosteus bit (it needs some prep and reconstruction)
  24. Ohioan Placoderms?

    I have heard about placoderms being uncovered from the Devonian of Ohio, but am unable to find any references to specific placoderm fossil specimens and where they are in Ohio. Can someone please shed some light for me on the subject? (I'm looking for ones just from the Ohio area ) I consider placoderms awesome! Thanks a ton!
  25. Concretion? Placoderm?

    My friend found this big concretion like fossil in Quqing, Yunnan of China. Something on the surface looks like a placoderm to me, what do you think?
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