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Found 19 results

  1. Bringing Fossils to Life

    Hynerpeton bassetti 2024

    Last year, I drew a Hyneria lindae, based off of recent discoveries and related fish. As soon as I finished it, I started working on a Hynerpeton bassetti, the Ichthyostegoid from the same site that is known from a shoulder girdle and a jaw, and possibly some other material as well. Hynerpeton is known to have been more muscular than Ichthyostega, because of the larger muscle attachments on its cleithrum (shoulder), and at one point was thought to have lost its external gills, but significant doubt has been cast on the evidence for this claim. Hynerpeton's jaw is not as robust as another stegocephalian from the site, Densignathus rowei, which was more derived and muscular. For this reconstruction, the skull (which is covered in skin but fully reconstructed) was based off of Ichthyostega, but the jugal bone was based off of a specimen from Red Hill that has been attributed to Hynerpeton. The shape of this bone affected those around it and suggest slightly different proportions in Hynerpeton than in Ichthyostega, especially concerning the shape of the orbit. The shoulder was incorporated so that the shape of the trunk would be correct, and the foot pads were based off of tetrapod footprints from the Early to Middle Devonian. The lateral line is again based off of its placement of Ichthyostega, as were the scales. In the background, above the water's surface, a forest of Archaeopteris spp. trees and Otzinochsonia beerboweri lycopsids is visible; within the murky river, the red mud that gave Red Hill its name after it was deposited is covered over with plants. This reconstruction is meant to be a sequel to my Hyneria lindae reconstruction I finished about five months ago; unfortunately, I have no specimens of Hynerpeton, which is very rare. If anyone would like to see any citations for the papers that I used in making this reconstructions, please ask below. Enjoy!
  2. Paul1719

    Gyracanthus

    Gyracanthus is a cartilagenous gnathostome possibly a stem or sister clade to the Chondrichthyans. Most common fossils found are the fin spines but scapulocoracoids are not uncommon. Fossils here are result of collecting over 8 years from 2013. diagnosis.—Medium-sized gyracanthid fish, maximum estimated body length approximately 1 meter. Maximum fin spine length estimated 375 mm. Ridge width constant at maturity, ridge width constant along insertion-exsertion boundary at maturity, interridge width equal to or less than ridge width. Cristate tubercles ≤2 mm height, ≤2mm width, 9-11/cm proximally on pectoral fin spines, 8/ cm proximally on pelvic fin spines, 15/cm proximally on dorsal fin spines where preserved. Major and minor axes on tubercle, apex oriented oblique to underlying ridge. Pectoral fin spine inserted approximately one-third the length of the fin spine, ridge width constant along insertion-exsertion boundary at maturity, maximum fin spine ridge chevron angle along leading edge 90°, ornamented ridge dorsal to posteromedial groove. Two types of pelvic fin spines, one narrower with extensive exserted area, one wider and more robust with extensive inserted area, both with inserted area extending greater than half the length of the spine. Pelvic fin spine ridges curved retrorse towards midline. Median fin spines approximately symmetrical, comparable to paired fin spines but smaller and straighter distinct anterior and posterior dorsal fin spines. Prepectoral ventral plate with more than 30 tubercle rows, largely subparallel, some bifurcating, curving to the middle only at the extrema, convergent towards the lateral edge; prepectoral ventral plate inserted area at least a third of the width of the plate.
  3. bockryan

    Fish Scales

    From the album: Fossil Collection: DC Area and Beyond

    Fish Scales Cogan House, PA (Route 15) Catskill Group Late Devonian
  4. bockryan

    Unknown

    From the album: Fossil Collection: DC Area and Beyond

    Unknown Cogan House, PA (Route 15) Catskill Group Late Devonian
  5. bockryan

    Unknown

    From the album: Fossil Collection: DC Area and Beyond

    Unknown Cogan House, PA (Route 15) Catskill Group Late Devonian
  6. bockryan

    Fish Scales

    From the album: Fossil Collection: DC Area and Beyond

    Fish Scales Cogan House, PA (Route 15) Catskill Group Late Devonian
  7. Bringing Fossils to Life

    Bone ID

    For the longest time I have puzzled over this strange bone. At first of course I thought it was a "Hynerpton scute," because I have a memory of finding it somewhat near where the holotype was found and no papers picture them, so I couldn't compare. Recently I've doubted its identity as I've researched Ichthyostega scales and scutes, but have no idea of what it actually is. Any ideas? On the imprint nearest to the camera a texture can be seen, shiny smooth with little circular rounded bumps that are the negatives of pores. Size a little less than 1.5 cm from end to end.
  8. Bringing Fossils to Life

    What kind of Jawbone?

    A few months ago I found this bone at Red Hill before I learned of the need for a permit but didn't grasp its significance. Later I realized it was a jawbone section with four small teeth in it. Unfortunately I dropped it and the end of the most complete tooth fell off, but not before I was able to take pictures. I have not tried to finalize preparation for fear of destroying the remaining teeth. I can't see any sutures, at least not in the place they would be for a tetrapodomorph, and the teeth look more like Hyneria anyway. However, all Hyneria jawbones I've seen have two rows of teeth, a small one and one with longer fangs. The cross section is also hard to place. The teeth seem to start out round and flatten as it goes up. The first picture is as the bone is now and the second shows what the complete tooth looked like before it broke. Scale bar 1cm broken into 5mm halves. Teeth magnified 20x.
  9. Misha

    Fish plate

    From the album: Misha's Late Devonian Fossils

    Small plate from fish found at Red Hill. My best guess as to the ID would be a Turrisaspis sp. Posterior dorsolateral plate, although I am not sure that that's what I have here as I couldn't really find much to reference. Late Devonian, Catskill Fm., PA.
  10. I managed to actually take a vacation last weekend and meet up with our very own Tim and Paul to collect Late Devonian verts from PA. I first met up with Paul at Red Hill. When I first arrived at the site I didnt know the person there was him. So I parked and walked into the ditch at the base of the road-cut and immediately spotted a strange form in a piece fallen from above. As it turned out it was a Gyracanthus spine! Gyracanthus sp. Turns out the mystery collector was Paul, who was kind enough to give me a rundown on the site, its geology, and show me the awesome finds he had been collecting. After being there for twenty minutes I was impressed by Paul's fortitude - it was hot, very hot! Red Hill is a difficult place to collect, with the best stuff coming from only one small band of sediments. One must spend hours removing overburden and working the layers back to find the sparse good finds. Paul is exceptionally well versed in the Upper Devonian Catskill material and is a great guy to collect with, even inspiring me to climb up and join him on the side of the cut. Unfortunately the heat was too much for me and I came down after only a short time. A friend of his stopped by, who had several decades of collecting there. His name was Doug and he took me to the small museum in the nearby town to see the Red Hill material that he had collected there. As soon as I figure out how to upload the photos from my phone I'll share pics of the place..it was neat; there has been some incredible things from that site. Afterwards I returned and met up with Tim there (who is also knowledgeable and fun to collect and hang out with. ) My overall impression of Red Hill: Very interesting site, best visited in the fall or early spring, requires dedication, perseverance and patience though to find the good stuff. The next day I rode with Paul to meet up with Tim, Dave Broussard a Professor at Lycoming College, and another teacher named Chris (I didnt get a chance to speak to Chris much unfortunately.) We met at a quarry near Canton which exposed more of the Catskill. Unlike Red Hill, there were fossils every where! And they were all vertebrate fossils too! My first good find is this plate with numerous juvenile (fingerling) Bothriolepis median dorsal plates and head plates. Bothriolepis sp. I learned later when working on this plate that a partial pectoral is also present (but I havent taken a pic yet.) I also found this tooth (impression) of an unknown lobe fin fish I also found a large section of skull plate most likely from Hyneria Scales are the most common fossil at this site. This is a large example (though I cant remember the genus.) By far my best find is a section of jaw from a ischnacanthid acanthodian. When I found this there was only one other from this site, so I donated it to Dave for his research into these fish. Shortly afterwards one was also found by Paul. The teeth were not separate from the jaw bone in the ischnacanthids, though, they were made of dentin. It is doubtful if they could replace a broken tooth. I'll be adding more finds from the quarry as I finish photographing them and cleaning them. We stayed at the quarry til noon, after which Paul had to leave. Dave was kind enough to show Tim, Chris and myself the location of a productive road cut where many scales and placoderm plates could be found. Though he and Chris left after showing us the site, Tim and I collected for a bit. I did pretty good there (as did Tim.) Pieces of the placoderm Turrisaspis were very common. This is the dorsal median plate of one (the dorsal fin if you will) and close-up part of another one This one has the spiny "leading edge" of the pectoral "fins" as well as a partial plate of the rarer placaderm Phyllolepis With the exception of the Phyllolepis bit, all are Turrisaspis sp. Heres an awesome model of Turrisaspis by C. Fredrick Mullison As I work on trimming the blocks I keep making accidental finds, Like these partial Hyneria teeth The top tooth is 1.5cm and the bottom is 13mm. Hyneria sp. And these unidentified fish teeth are fairly common as well . They are considerably smaller and more round for piercing unlike the hyneria teeth which have a sharp edge on the blade. Its not uncommon for the tips to break Thats it for now, Ill keep posting pics as I clean them.
  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. historianmichael

    Catskill Fm Plant Material?

    While collecting in the Catskill Formation of Pennsylvania I came across this piece that struck me as a little strange. It is different from other plant material that I have seen/found at the Red Hill site. I ended up bringing it back home just because of how odd it was. Is this perhaps Callixylon? Alternatively it could just be geological. Any help is greatly appreciated. Here is a close-up of the big piece in the middle:
  13. So an interesting summer. As some of you might know, Parks and Recreation came down hard on the Red Hill site while I was working there. At some point, the site had been transferred to Forestry, ya go figure. So there has not been an active permit for some time. But I was homeless and in need of a project so I was able to connect with Prof. Dave Broussard of Lycoming College and shift my focus to the sites along Rt 15 north of Williamsport. Still Catskill although the exposures at Powys Curve are Sherman Creek (Frasian) member instead of the Duncannon (Fammenian). I had collected there with my son Ian a while ago but was at one of the less productive sites I've been visiting this summer. This is the find of the summer (maybe lifetime). It is a Tristichopterid, like Hyneria. Its at the Academy of Natural Sciences in Philly and just being described now for a publication by Ted Daeschler.
  14. MeisTravis

    Devonian Catskill Fm unknown

    I was wondering if this is even a fossil or some kind of weird rock formation I found. It’s from NEPA in part of the catskill formation. Let me know what you guys think!! Basically all I’ve ever found there is trace fossils so I wasn’t sure if this is even anything. Thanks all!
  15. From an abandoned blue stone quarry in northeast Pennsylvania . This location has produced archaeopteris leaves. This part of the exposure is Shaly sandstone . The thing that caught my eye has a brownish color instead of the gray of the surrounding rock . Surrounding rock all breaks with angular fractures while this looks rounded. It’s a little weird to my eye because it gets wider going up I expect stumps to be widest at the base . Running across the outcrop the layer. With the possible stump is a two or 3 inches thick and is full of woody Fossils, which makes me wonder if this is part of a lateral root system . I can go back and look at the site again tomorrow. Can anyone educate me about specific things to look for ?
  16. From a long abandoned bluestone quarry in NE Pennsylvania. Devonian, Catskill formation. Found by my sister-in-law, who was really looking for live birds! Ideas?
  17. Paul1719

    Hyneria lindae

    Prepped by C. F. Mullison Currently in collection of Academy of Natural Sciences, Philadelphia,
  18. From the album: Lower Devonian

    Bryozoan seen in cross section Lower Devonian New Scotland Limestone Helderberg Group Catskill, NY
  19. Jeffrey P

    Another Macropleura Brachiopod

    From the album: Lower Devonian

    Macropleura macropleura Lower Devonian New Scotland Limestone Helderberg Group Catskill, NY This one's much larger than the specimen from Schoharie.
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