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  1. From the album: Virgilian Series

    Paraconularia crustula, Jacksboro Finis Shale, Graham Fm Feb, 2023 Jacksboro is one of the few sites where Conulariids are a common find. These enigmatic fossils are thought to belong to Cnidaria. Conulariids are actually known to produce pearls, though I'm not sure if these have been discovered specifically at Jacksboro.
  2. From the album: Virgilian Series

    Rhynchopora magnicosta, Jacksboro Finis Shale, Graham Fm Feb, 2023 A rare find for Jacksboro!
  3. Mikrogeophagus

    Fimbrinia plummeri, Finis Shale, Graham Fm

    From the album: Virgilian Series

    Fimbrinia plummeri, Jacksboro Finis Shale, Graham Fm Jan, 2023
  4. I heard from a friend that someone recently posted a bryozoan I found here but I missed seeing it and I can't find it so they may have been mistaken. However, that reminded me that I had only posted it on Facebook so I thought you might like seeing it here too. I'm pretty sure it is a Tabulipora carbonaria which must have been named by a lumper since it appears in such a wide variety of forms. It can be branching, encrusting or massive. The latter is how you describe one than is self-encrusting, forming a sub-hemispherical mound, much like a stromatolite. This is one of the branching forms and came from the Finis Shale of Jack County Texas, a Late Pennsylvanian member of the Graham Formation. The ones I usually find are much smaller, with a diameter less than 3 mm. When I walked up on this I thought it was a burrow infill until I noticed the zooecia. Then I assumed it was the encrusting type until I look at a cross-section with a loupe. Maybe some of you find them this big normally but this is a first for me. In situ image ready to assemble close-up of side closer end view, millimeter scale close-up of end
  5. I found this cephalopod at the Lost Creek spillway site neat Jacksboro Texas. It's from the Finis Shale, Graham Formation, Upper Pennsylvanian. The largest dimension is 16 mm. It seems to be a replacement fossil so no sutures are showing and I don't know of any similar goniatites so that suggests a coiling nautiloid. The only thing I know of with a trapezoidal whorl cross-section like this is a Titanooceras and T. ponderosum has been found there but of course they are huge so it would have to be close to the protoconch. There is an off-center ridge going along the venter and the shell thickens greatly at the ventrolateral margins. I can check for any other features that might help with an ID. edit: It occurred to me that this may not be a cephalopod at all but a gastropod, Amphiscapha subrugosa but I haven't seen one with the ventral ridge. Ventral view Dorsal View
  6. The Pennsylvanian of Texas is a strange and exciting place. Even though I've been going at this whole fossil hunting thing for about a year and a half, my experience in this age of rock is extremely limited. And yet, many of my most prized specimens have come from such hunts. I've had the pleasure of visiting a few of the more prominent Pennsylvanian sites to be had around Central Texas, but now that I'm back up North, I thought it would be prime time to check out a spot that many have put in good words about. Another local collector, @PaleoPastels, had also been dipping her toes in the Paleozoic, so we decided to go for a group outing along with her entomologist roommate to the famous Lost Creek Reservoir in Jacksboro and a couple of Bridgeport localities! Unfortunately, @BobWill couldn't make it for that day, but he was nevertheless very helpful with providing guidance and advice on hunting the Finis Shale. Nothing beats first laying eyes on a distant exposure. The walk felt like an eternity! The day started off early and, after a bit of confusion , we managed to make it by about 9 am. The air had yet to be warmed by the sun, so we were all feeling a little chilly as we walked to the bluffs, simultaneously exchanging gifts and introducing ourselves. I was relieved to find that Lari was just as nice as her online personality made her out to be and we got straight to chatting about, well, fossils. Cole wasn't as big on fossils as Lari, but he still showed good enthusiasm. We weren't expecting trilos here, but I was crossing my fingers that we'd get some in Bridgeport to fulfill his entomology interests. Looking to the left and to the right on the Jacksboro slopes Once we reached the grey base of the bluffs on the far right end, we were all immediately hunched over, gathering up bits and pieces of the wide diversity of fauna present at the site. The ground was literally covered in millions of brachiopods, cephalopods, and gastropods. Some of my favorite things to pick up were snails of the order Bellerophontidae. They've got such a unique look to them that drastically differs from the gastropods of the Mesozoic and Cenozoic. A Pharkidonotus percarinatus gastropod still in matrix We steadily made our way to the left, scuttling up and down the slopes over and over again. The initial excitement had waned and the pace of finds slowed; Now we were really trying to focus on getting some of the rarer/cooler stuff. Throughout the morning, I had been yapping away about conularids: How strange they are, how I was really hoping to find one, how this was the one place where they were almost common, etc. I thought we'd have found one a lot sooner, but the lack of results and recent rain got me a little nervous, I must admit. I was starting to regret talking about them so much, especially when Lari and Cole began getting more interested in them. Surely this place was so big, it couldn't run out of them, right? A recreation of how I found the first conularid of the day Well, I guess the place is big enough because the first conularid of the day was at my feet before I knew it. It's beat up, but the enigma surrounding this animal is enough put it on the top shelf. Throughout the day, I found a handful more. I offered some to Lari, but she would not be satisfied until she found one on her own, which I understand. To find out if she and Cole scored any, you'll have to wait for her side of the story . Fimbrinia plummeri Not so far from the first conularid, I picked up my favorite brachiopod of the day. This specimen was extra shiny and had some nice pointy spines, warranting placement in my rares/delicates ziploc. I thought I had reached the peak of the day when I was forced to stop mid conversation. Inches from my face, I spotted the subtle glint of wrinkled enamel attached to an inconspicuous pebble. If I hadn't seen one of these featured on the forum last Spring, I'd probably have moved right past it. The first fragment I gazed upon was the largest and very clearly belonged to the shark, Glikmanius occidentalis. I hurriedly gathered two more smaller chunks and tried to reassemble the tooth. Glikmanius occidentalis cladodont shark. Don't worry, I figured out to flip that smaller fragment around by the time I consolidated everything! Unfortunately, the tooth crowns and a piece of the base were nowhere to be seen. There was a little valley next to it, so the other bits may have been washed away for all I know. Nevertheless, these teeth are simply awesome. I have a soft spot for shark teeth, so a charismatic find like this will always be a trip maker! I wonder if ones with cusps still attached have ever been found? Consolidated tooth. It's pretty, but I'll admit @historianmichael has me beat with his from earlier in the year! We rounded off our time in Jacksboro checking out the far left side of the exposure, mostly around the flats. There, pyritic cephalopod micromorphs could be found in excess. Shown below is my best specimen from that area: Wiedeyoceras pingue? Thus, our time at Jacksboro had run its course and the path was set for Bridgeport. Lari was kind enough to share some turkey jerky and the best blueberry muffin I've had in a long time. We all had some nice finds out of it, but I'm sure the place is a lot more productive if caught right after a storm. This spot is definitely due for a return. After identifying everything at home, I now have a list of over 55 unique species to show for the hunt! Bob and DPS have pooled together some great resources for researching IDs, but it was nevertheless an exhaustive (and satisfying) process. Bridgeport Prior to the trip, I did some recon and found a short list of cuts around Lake Bridgeport for us to visit. Since the day was already getting a bit late, I decided we should visit only the best two of the list which exposed what I believe to be the Bridgeport Shale. It was a pretty short drive and soon enough we were back together with our eyes glued to the ground at the first spot. We were on the look out for trilobites first and foremost. Within about 5 minutes, I found the first trilobutt! First trilobutt of the day I'm not sure if there is more trilobite within the nodule, but I will try to work it down and find out. Unfortunately, the trilobites did not start popping up like crazy as I had hoped. Instead, we were mostly collecting gastropods and the occasional horn coral. I did at least manage to find a pretty death assemblage of Trepospira snails. Trepospira snails I will say the red stone eventually gave me some bad flashbacks of Woodbine busts from the past. At times, it felt like I was hunting in a pile of unfossiliferous landscaping gravel. As we began wrapping up, I managed to pull a chunk of matrix with some trilobite material on top, but I wouldn't say it's anything too impressive. Trilobite material We took a short drive over to the second and final cut which exposed the same sort of rock. I got skunked at this spot, but Lari and Cole each managed to snag their own trilobite and had success splitting the various nodules. I was happy we all came out of Bridgeport with some trilobite material to show for it! The day felt like it was gone in a flash, but my body was definitely calling it quits. It was fun to meet up with another forum member and explore some unknown territory. A future second get-together is for sure in the cards after some rainy weather . Throughout writing this report, I've left out a lot of awesome finds so Lari can share them herself. So, keep an eye out for her side of the story! Anyways, here is an overview of the finds: Top L to R: Metacoceras sp., Gonioloboceras goniolobus, Brachycycloceras normale, and Euloxoceras greenei 2nd Row L to R: Pseudorthoceras knoxense, and Ephippoceras sp. Bottom L to R: Rugobactrites jacksboroensis, Wiedeyoceras pingue?, and Domatoceras sp.? Top L to R: Lophophyllidium spinosum, Paraconularia crustula, and Lophophyillidium plummeri 2nd Row L to R: Fusunilids, and Incrustospongia meandrica Bottom L to R: Fenestella sp., and Tabulipora sp. Note: Syringopora sp.? not pictured Top L to R: Rhipidomella carbonaria, Neospirifer dunbari, and Punctospirifer kentuckyensis 2nd Row L to R: Lissochonetes geinitzianus, Wellerella osagensis, and Neochonetes granulifer Bottom L to R: Meekella striatocoastata?, Crurithyris planoconvexa, and Hustedia mormoni Top L to R: Hystriculina texana?, Echinaria semipunctata, and Kutorginella lasallensis Bottom L to R: Composita subtilita, Kozlowskia splendens, Fimbrinia plummeri, Eridmatus texanus?, and Phricodothyris perplexa Note: Differentiating between Hysticulina and Kutorginella was a bit of a challenge. Top L to R: Glikmanius occidentalis, Archaeocidarid plate Bottom L to R: Various crinoid parts including a regenerating spine on the far right. The spine left of it has strange circle impressions on it. Top L to R: Nuculopsis girtyi, and Astartella concentrica Bottom L to R: Yoldia glabra, and Allorisma costatum? Top L to R: Cymatospira montfortianus, Knightites tennulieata, Pharkidonotus percarinatus, and Euphemites vittatus 2nd Row L to R: Euphemites multiliratus, Knightites tennulieata?, Trepospira illinoiensis, and Glabrocingulum grayvillensis Bottom L to R: Worthenia tabulata, Soleniscus primigenius, and Strobeus paludinaeformis Top L to R: Amphiscapha subrugosa, Donaldina sp.?, and unknown gastropod Bottom L to R: Pseudozygopleura semicostata, and Meekospira choctawensis Hashplates: Bridgeport: Thanks for reading!
  7. I usually take Bobbi fishing on Labor Day, but the fishing has been tough lately on my home lake. I thought maybe I could find a better fossil bite. But my usual spots are too high water and/or too muddy, especially with Bobbi coming along. So I decided to make a drive to west Texas. We stopped and had a nice breakfast on the way, then drove on to a site that is Finis Shale. We hunted it long enough to gather up quite a bit. Here is the first snail I spotted, an ammonite piece, and Bobbi on the hillside above the outcrop.
  8. BudB

    Ammonite piece

  9. BudB

    Snail

  10. This is from the Finis Shale in the Pennsylvanian, Graham Formation at Jack County, Texas. It had no visible features except for a rectangular patch of a different color from the matrix until I magnified it. The images are using an inexpensive usb microscope set to 250x so not great resolution but it's all I have. It looks like the grid pattern you see on some fenestrate bryozpoas but these are just way too small. The closest image has a total height of about 1 mm.
  11. I found this 16mm long, slightly tapered stick-like specimen at the Lost Creek Lake spillway near Jacksboro Texas in the Finis Shale member of the Graham formation, Late Pennsylvanian. Until I got a closer look I thought it was an encrusting Bryozoan but this texture appears to be much less organized than the pores on them. It is similar in texture, but more coarse, to the material found in the cores of some possible concretions which have been described as burrows with a core (?) that occur frequently there. The end view shows a thin, shell-like outer layer which is also on some of the cores of the concretions. A burrow with a core never made any sense to me anyway but I don't usually get a look at the core protruding out like these for a look at their surface texture so the similarity caught my eye. Besides the finer texture the ones in concretions do not seem to taper like this stick. I wonder if they could be some kind of plant material. We find some here but it is marine so it would be wood that floated out and sank. Here are two of the "burrows" or maybe concretions. The second one has odd, randomly spaced rings around it.
  12. I found fragments of a cephalopod at the Lost Creek spillway site near Jacksboro Texas on August 21, 2021. Pennsylvanian, Graham formation, Finis Shale member. It includes a 90mm long section and two short phragmacones. The 8 pieces of the longer section were found adjacent to each other and fit together perfectly but the two smaller pieces were a few cm away and no points of contact could be confirmed. The long section exposes the inside of part of the shell and is encased in a concretion on the outside, not the usual way these are found. The smaller pieces exposed the outside of the shell in the more common way. The long section is broken along the long axis with approximately one half of the shell missing along one side. There are possible fragments of the missing side lying on the interior surface. The smallest phragmocone has a ventral siphuncle suggesting a Bactrites but an intermediate layer with the finger-print pattern is visible on both short pieces and some of the broken pieces lying inside of the long piece, supporting the possibility of it being Shimanskya postremus instead. At first the absence of apparent cameral deposits on most of the long section suggested it may be the body chamber. Both smaller sections had septa. Evidence of a single cameral deposit at one end on the long piece caused me to think it may be towards the adapical direction and the diameter of the larger phragmacone section was the same size as that end at 29.7mm. The diameter of the smaller phragmacone varied from 20.6mm to 22.3mm. However, the diameter at the opposite end of the larger section was smaller than the end with the possible cameral deposit at 24.9mm. Of course if it were toward the adoral direction it should have had a greater diameter uming the shell continued to increase in size as it grew. The smaller phragmacone was found near the smaller end and the larger phragmacone near the larger end. This makes me doubt that the apparent lack of septa or cameral deposits in the long piece actually confirms that it is the body chamber. It could be that an outer layer is all that is present since that may not have evidence of cameral deposits. Are my assumptions about this specimen correct? If so, is this a common way to see these specimens preserved or is the view of the inner surface fairly unique?
  13. 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 missing ventral lobe, but the treatise shows those to be Mid-Denonian. Maybe the ribs could be described as annulations and the siphuncle as subventral making it a nautiloid like some Brchycycloceratidae but B. normale and B. curtum are all I see on the fauna list for the site and they have much large apical angles at around 22º and 40º. Any ideas?
  14. 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 whorl being about twice as wide.
  15. 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 here is a close-up of the longitudinal lirae with fine crossing radial lirae. This shows it on the venter of another specimen and here is the largest sample which would have had a diameter of around 77mm without the body chamber, much larger than Agathiceras which I believe can range from 8 to 30mm depending on the species. I would appreciate any help with these.
  16. 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 of shell Inside surface Edge of possible aperture Margin showing profile wedging to a fine edge Close-up of edge profile before prep completed
  17. 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 knoxenses. This got me wondering what these creatures might have looked like whole so I started to gather a few fragments that might fit together in a continuous shell, including a piece with the protoconch and one with part of the body chamber. The result had one empty space which I filled with a clay reconstruction, then made a plaster mold from which I poured a plaster cast to fill the gap. I used super glue to hold everything together so I could take it apart with acetone if I wanted too. It may make a good display fossil for our table at local events though so I'll probably donate it to the Dallas Paleontological Society. The second section from the large end is the fake part. The rest are all genuine fossils from the same site but collected over several years, so not even considered to be associated. I'm pretty sure they are all the same species though. The whole thing is 38cm long and came out fairly straight considering what I had to work with..
  18. 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.
  19. 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.
  20. 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 hear it is being recognized as special. Another formation in Texas as well as some in the deep south of the U.S. and others abroad are included in the list from the article presented at the 11th North American Paleontological Convention this June. Roden et al2019 NAPC.pdf
  21. 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 exposures at Jacksboro.
  22. 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.
  23. 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 aside for this program and this time they are showing some of my collection from the famous Lost Creek dam site at Jacksboro Texas. The Finis Shale is a member of the Graham Formation in the Late Pennsylvanian Sub-period and is known for it's fossils with excellent perservation and an incredible level of diversity. I got lots of help with identification from Dr. Benjamin Neuman of Texas A&M University at Texarkana and other members of our Finis Shale Study Group hosted by Dr. Merlynd Nestell of U.T. Arlington. Lynne Hubner is the head of displays at the museum and did great job of arranging the 100+ fossils and making labels. All of them fit into one case except for one very large clam that filled another smaller case. The display will be there until some time in April. If you find yourself in the area this is a great place for a family stop. They also have hiking trails and many programs for all ages. here are the first two images of the display.
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