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  1. I am having trouble putting a label on this cephalopod from the Upper Pennsylvanian, Graham formation, Finis Shale member, from Jacksboro Texas. The conch is crushed on the anterior end which distorts the apical angle but the intact posterior end shows an angle of around 12º and the cardinal ratio is about 2. My first thought was bactrites but if that is the siphuncle it appears to be very near but not quite in contact with the ventral wall, which I thought was a requirement for the whole subclass. It looks a little like the “doubtful” genus Cylobactrites with the foldlike ribs and m
  2. I found this partial nautiloid at Jacksboro. Finis Shale member, Graham Formation, Pennsylvanian. The odd part is how deep the umbilicus is. There was just enough of it to see a piece of intact inner whorl for the profile and some septa to know about how much bigger it could have been if an adult. There was also a piece of the flank broken back with tubercles. I made the clay model of what it might have looked like whole but left off most of the tubercles. I will add photos comparing it to a Metacoceras fragment of about the same diameter that shows the depth from the flank to the previous who
  3. I'm unable to identify these goniatites from the Finis Shale member of the Graham formation. Found at the Lost Creek spillway near Jacksboro Texas. At first I thought they were just extra large examples of Agathiceras sp. which can be found there because of the longitudinal lirae but I noticed some other differences. These are more evolute as well as being larger. They also have a larger whorl height to whorl breadth ratio at 1.11 to 1 compared to .85 to 1 for Agathiceras. This one shows the larger umbilical diameter of 10mm and he
  4. This specimen from the Finis Shale of Jacksboro Texas is the first example of a Pennsylvanian nautiloid showing part of the aperture that I have found or even seen. Maybe they are common and I just don't get out enough I believe this is Stenopoceras sp. and the attached clam is probably Pseudomonotis beedi since that's the only species of that genus I can't find an image of and the others on the fauna list have ribs that curve away from center. You can help me twice if you can confirm the clam ID and show us your nautiloid apertures for comparison. Outside
  5. I know some of you find very complete nautiloids that are much larger but here in Texas they are often smaller and fragmentary, though the pieces can be well preserved and easy to extract from the loose shale of the Graham Formation at Jacksboro Texas. I had many fragments separated into boxes labeled "Pseudorthoceras" and "Mooreoceras" for smaller and larger segments respectively. Then I saw a paper that invalidated the latter genus, Revision of Some Common Carboniferous Genera of North American Orthocerid Nautiloids, Kröger & Mapes 2005, which made all of my specimens Pseudorthoceras kno
  6. I found this bivalve at the Lost Creek Spillway in Jacksboro Texas, Graham Formation. It's 30mm across and it came attached (post-mortem) to a nautiloid fragment. It has been suggested that it could be Pseudomonotis sp. possibly based on it's inclusion on the fauna list but it sure looks more like either Dunbarella rectilaterarius or D. knighti neither of which are know from the site. Maybe it is some species of Pterinopecten from the Pennsylvanian if there are any. Any help would be great.
  7. Oxytropidoceras

    Pennsylvanian Fossils of North Texas

    FOSSIL Roadshow Webinar 2- Pennsylvanian Fossils of North Texas https://www.youtube.com/watch?v=VXRzTzW-aVM myFossil https://www.myfossil.org https://www.youtube.com/channel/UCt18MbS9hR6BjGK6yV_aI_A Yours, Paul H.
  8. A new type has been added to the two lagerstätten used now. A "conservation lagerstätte" features exceptional preservation without much diversity and a "concentration lagerstätte" has extraordinary diversity without notable preservation quality. To recognize sites that have very good but maybe not exceptional preservation as well as a level of diversity that exceeds the conservation type we now can call some sites a "liberation lagerstätte." Anyone like myself with an interest in the Finis Shale member of the Graham Formation found in Jack County Texas will not be surprised to he
  9. A Russian colleague of Dr. Barbara Seuss will be presenting a poster at the March 2020 GSA meeting in Ft. Worth. It is on Finis Shale fish microremains based on their study of material from Jacksboro Texas. In October of 2016 several of us from Dallas Paleontological Society helped Barbara take sample material for her work and they are still gathering data from the resulting fossils. Dr. Seuss is with the University of Erlangen-Nuremberg in Baravia Germany and hosted another poster by a student of hers at the GSA meeting in Phoenix this year. It was on bivalves also from the Finis Shale e
  10. BobWill

    Possible Texas Bactrites

    I found this at the Lost Creek Dam site at Jacksboro Texas. It is the Finis Shale Member of the Graham Formatoion in the Upper Pennsylvanian Sub-period. I don't often find the apical end of any nautiloids so I was thinking it could help with the ID. There is a dark spot on the oral end that may or may not be the siphuncle, it is not clear. I thought it may be a Bactrites but it would be one without the hemispherical apex and constriction you see on some. It also has a cameral ratio higher than some Bartrites at around 3. I don't know what the black dots are.
  11. The Heard Museum in McKinney may not be the first place you think of for viewing fossils but they have a growing collection of locally found specimens including an Oligocece tortoise with an unusual view of the inside and a mosasaur left partly in the matrix to show how it was found. A couple of years ago they also started a program especially for amateur collectors. It's called "Collect it Yourself" and shows visitors what is possible for anyone with an interest in fossils to accomplish. Every six months a new collector brings enough material to fill the two display cases they set
  12. I'm having trouble getting the right name for this tiny Goniatite from Jacksboro Texas. Upper Pennsylvanian, Finis Shale Member of the Graham Formation. Small at only 7mm.
  13. BobWill

    Jacksboro Texas Goniatite

    I having trouble finding out what Upper Pennsylvanian Goniatite this is from the Graham Formation, Finis Shale Member. Found at the Lost Creek Spillway site near Jacksboro Texas. It is very evolute with the whorls barely overlaping. This view shows the compressed whorl section with a rounded venter. These show the flanks with sutures The venter and a rough drawing of the suture
  14. Another grouping of fossils from the Pennsylvanian Finis Shale Site near Jacksboro, Texas. Always something to find there.
  15. Found this somewhat flattened Brach (Derbyia crassa) in the Pennsylvanian age Finis Shale formation at the Lost Creek Reservoir borrow pit near Jacksboro, in Jack County, Texas a couple of weeks ago. It's not perfect but I love fossils that are still in the matrix and that aren't pristine and show signs of predation and deformation from the weight of the overlying matrix.
  16. Gary and I went out to Lost Creek Dam yesterday. We paid our park fee and hiked the dam back to the pit. There were new signs on both gates that read "Danger--Authorized Personnel Only." I called the park office and they weren't aware of the change and suggested I call City Hall. I did, and after I asked about possible rule changes I was put on hold for 7 minutes. Another woman came on and had me repeat my question. She told me we could hunt, but they wanted to be notified in advance. She took my name and phone number, and a head count. I asked her if I could disseminate this info on var
  17. mikecable

    Finis Shale ID

    Straight line cephalopod fragments. One stood out. Plant? Finis Shale.
  18. DPS Ammonite

    Articulate Brachiopod

    This is a less common brachiopod collected at the rich Finis Shale site in the spillway of the Jacksboro Reservoir. It is often confused with the more common Composita subtilita which has a stronger sulcus fold and no small spines.
  19. rwise

    Jacksboro, Texas bivalve?

    Jacksboro, Texas Lost Creek Dam area, about 1 inch long, Pennsylvanian, Graham Formation, Finis Shale. Need help with ID. Thanks in advance for any help.
  20. BobWill

    Unknown from Jacksboro Texas

    I found this at the Lost Creek dam spillway in the Finis Shale of the Upper Pennsylvanian at Jacksboro Texas. The patterns remind me of cartilage. other side edge more photos in reply
  21. DinoMike

    That moment when...

    Ah, yes... that moment when you're out hunting, lying on a shale outcrop on a VERY chilly morning, hunting Pennsylvanian fossils & wishing you had worn a heavier jacket than just a thin cotton hoodie... ... when suddenly you hear "tick... tick tick... tick..." and wonder "What's that noise?" ... then you realize it's from tiny bits of sleet starting to hit the ground around you. It got worse fairly quickly, and I had to deal with a 7/10ths of a mile walk back to the car, across a dam, trying to carry my gear & keep my hood low enough across my face that I could
  22. BobWill

    Pennsylvanian valve from Texas

    This came from the Lost creek Dam site in Jack County Texas, late Pennsylvanian. It looks like a valve of something but I don't even know if it's a brachiopod or a bivalve. It is probably crushed some so that doesn't make id any easier.
  23. FruitofTheZOOM

    Tainoceras sp.

    From the album: Collection

    © fruitoftheZOOM

  24. FruitofTheZOOM


    From the album: Collection

    © fruitoftheZOOM

  25. FruitofTheZOOM


    From the album: Collection

    © fruitoftheZOOM

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