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Found 44 results

  1. Texigryphaea marcoui bivalve a.jpg

    From the album MY FOSSIL Collection - Dpaul7

    Texigryphaea marcoui bivalve SITE LOCATION: Mills County, Texas, USA TIME PERIOD: Lower Cretaceous (100-145 million years ago) Data: Gryphaea, common name Devil's toenails, is a genus of extinct oysters, marine bivalve mollusks in the family Gryphaeidae. These fossils range from the Triassic to the Tertiary periods, but are mostly restricted to the Triassic and Jurassic. Both periods belong to the era Mesozoic. They are particularly common in many parts of Britain. These oysters lived on the sea bed in shallow waters, possibly in large colonies. The complete fossils consist of two articulated valves: a larger gnarly-shaped shell (the "toenail") and a smaller, flattened shell, the "lid". The soft parts of the animal occupied the cavity between the two shells, just like modern oysters. The shells also feature prominent growth bands. The larger, curved shell sat within the mud on the sea floor. These shells are sometimes found in fossil plates along with Turritella, clams, and sometimes sharks' teeth and fossilized fish scales. Its distribution is common in areas of both Europe and North America. A classic location to find these fossils is Redcar, on the northeast coast of England. There used to be a common folk belief that carrying one of these fossils could prevent rheumatism. They are also found in abundance in the state of Kansas in riverbeds and cliffs as well as the Big Horn Canyon of Wyoming and Montana. The benthic, free-living oyster Texigryphaea was the dominant constituent of many late Albian marine communities in the Texas and southern Western Interior regions. Large topotypic assemblages of three common lower–middle Washita Group species (T. navia and T. pitcheri in Oklahoma and T. tucumcarii in New Mexico) each display considerable morphological variation in valve shape and the proportions and expression of various features. Variation within an assemblage is partly due to ontogenetic changes but is mainly ecophenotypic, with local variation in nature of substrate, water turbulence, length of attachment time, and other factors influencing the final morphology of the mature shell. Kingdom: Animalia Phylum: Mollusca Class: Bivalvia Order: Ostreoida Family: Gryphaeidae Genus: †Texigryphaea Species: †marcoui
  2. From the album MY FOSSIL Collection - Dpaul7

    Ilymatogyra ram's horn oyster fossil SITE LOCATION: Del Rio, Texas TIME PERIOD: Lower Cretaceous (100-145 million years ago) Data: The Gryphaeidae, common name the foam oysters or honeycomb oysters, are a family of marine bivalve mollusks, and are a kind of true oyster. This family of bivalves is very well represented in the fossil record, however the number of living species is very few. All species have shells cemented to a substrate. Shells are considered brittle, inequivalve, with the left, lower (cemented) valve convex and the right (upper, non-cemented) valve flat or slightly concave. Kingdom: Animalia Phylum: Mollusca Class: Bivalvia Order: Ostreida Family: †Gryphaeidae Genus: †Ilymatogyra
  3. Ammo Pendent

    Got a pretty little ammo pendent yesterday. Funny how I live in Florida but do not own any shell fossils,nor a single sharks tooth. I guess they are just so plentiful around here that I never kept any. Anyhow,back to the pendant. The guy I bought it from had little to no knowledge outside 'it's a shell,it's opalized,it's 5 bucks' So after some personal research I think I have a...... Cleoniceras Cleon Lower Cretaceous Madagascar It's 1 inch at its widest. Now,other than confirmation of ID, I'm wondering what the tiny spiral inside the opening is. Is it another teeny tiny ammo or just junk that settled inside as it fossilized.
  4. Fruiting body?

    I found this a while back in the lower Cretaceous. I'm not sure what it is. It looks like a fruit of some sort. I've never found anything like it. Mostly what I find are ammonites, gastropods, bivalves, brachiopods, corals and such. I have not totally cleaned it up, because I found these little nibs on the surface and I'm not sure if they're part of the structure or not. Also what I think is the top or stem area is very tough and I'd hate to ruin some fine feature if it's there. I'd like to know what it is supposed to look like before I finish it off. I'm a novice so I don't really know good techniques for cleaning off the stuff encrusting it. Hopefully I'll improve with practice. I'm eager to learn, because I've got a lot of cool fossils still encased in crud I'd like to remove if I knew a good way to go about it. It's about 2 cm in diameter. The first 2 shots I took on a mirror so you could see the top and bottom/side in one shot. Any help would be appreciated.
  5. FYI.....Amazing.... Abstract: A new fossil mushroom is described and illustrated from the Lower Cretaceous Crato Formation of northeast Brazil. Gondwanagaricites magnificus gen. et sp. nov. is remarkable for its exceptional preservation as a mineralized replacement in laminated limestone, as all other fossil mushrooms are known from amber inclusions. Gondwanagaricites represents the oldest fossil mushroom to date and the first fossil mushroom from Gondwana. Heads SW, Miller AN, Crane JL, Thomas MJ, Ruffatto DM, Methven AS, et al. (2017) The oldest fossil mushroom. PLoS ONE 12(6): e0178327. https://doi.org/10.1371/journal.pone.0178327 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0178327
  6. Name the Brittle Star

    I went back to the site where a friend found the brittle star mass mortality assemblage I posted here on the 16th of May. I wanted to look for one of my own and was just about to give up when I spotted this rock with more than just arms this time. This central disc is 7mm across and some of the arms are still attached. This is from the Duck Creek Formation in Cooke County Texas which is in the Washita Group, Albian Stage of the Lower Cretaceous. Is this enough detail to put a name on the label for this thing? I'll settle for a family if no one knows the genus or species.
  7. Sponge?

    Ran across this in Hunt Tx and am Hopeful it's a sponge but that may be because I'm desperate to find a really good one.
  8. Genus: Craspedodiscus (Milanowskia) speetonensis (Young et Bird, 1828)Origin: Volga river formation, Ulyanovsk region, RussiaGeological Age: Lower Cretaceous, Hauterivian Age (125 -133 million years ago) Size: 3.78 inches
  9. Pseudodiadema aguilerai

    Found by John Jackson on April 13, 2013 in northern Comal County, Texas. This is a very uncommon echinoid species. NHM reference
  10. The specimen was collected by John Jackson on July 27, 2013 in northern Comal County, Texas. This is an extremely rare echinoid species. NHM reference
  11. Anybody ever work on the shark teeth from our lowest Cretaceous formations here in Texas? I have a few teeth, both shark and fish, that are from the Glen Rose Formation (upper Aptian-lower Albian) and they are not coming up as obvious matches in my reference books. I have Welton and Farish, Finsley, and a few more. I also didn't find anything at Elasmo.com that matched as his stuff tends to be a bit younger... In particular I have a small tooth that appears to be a Leptostyrax of some sort. In some of the literature I see various species listed with conflicting age ranges. Have any of you fellow FF folk ever sorted this out? If this thread goes anywhere at all I'll get out the camera and start putting up photos as best I can.
  12. My Son Loves Ammonites!

    So we went down to the park this evening that is two blocks away. Same park as my post called 'soccer for you, fossils for me.' The two youngest boys and I went to the playground, but the 10 year old went to do his thing. After about 15 minutes, he came to report that he thought he "found another full ammonite." We find so many broken chunks of oxytropidoceras in the central Texas marl, but occasionally, a complete one can be found. This time, I was prepared with a multi-purpose tool, so I went to work. We were able to carve it out fairly well, and on the previous advice of forum members, we decided to extract this time. It did end up breaking into 6 manageable pieces, but we'll work on putting them back together tomorrow. We love this hobby!
  13. Soccer For You, Fossils For Me!

    When our town turned a local field into a park, they had to dig a reservoir-type area to deal with neighborhood drainage and occasional flooding. We live in a very fossil friendly area, and my 10 year old has the 'bug,' so when his brother has soccer practice at this park, he's off to drainage ditch. On Sunday, he dragged me down there to see his new fossil gold mine. Now, I must admit, that in our "Walnut Formation" in the central Texas Lower Cretaceous, we find a lot of ammonite chunks (oxytropidoceras), but we've not found a whole one. Until Sunday. We saw a portion that, though cracked, looked like it might have more to it, hiding in the rocks and mud. But we didn't have any tools with us. So at tonight's soccer practice, it was on like Donkey Kong. We left it in place due to it's fragile state, but this is what we found. We had a lot of fun and really enjoyed digging this out a bit.
  14. Oxytropidocerous

    From the album K-boy Cachers

    We usually only find chunks of these things, but we saw a section of this one sticking out and decided to see if the rest of it was there. We left it in place because of its fragile state. There may be more whorls, but we were happy with what we were able to get to. Not bad for a park that's only two blocks from our house!
  15. ammonite

    From the album K-boy Cachers

    My son's first full ammonite!
  16. I Think You're A Twin!

    My oldest son has gotten the bug! He begged me to take him back out with a friend on Sunday and within 20 seconds of hitting the rock pile, he started screaming, "ammonite!!! ammonite!! Dad I found a full one!" He later pulled a phymosoma texanum, and an anchura (snail) that was about four inches long. It was a good day. But let's look at that ammonite. Based off my field guide, it appears to be an engonoceras. One side is fully exposed while the other side is fully in matrix. As we looked at the matrix to decide if we wanted to file some of it down to make a desktop display, we noticed that the matrix was somewhat circular. I then noticed a tiny piece of what appears to be another ammonite sticking out of it. What's better than finding a full ammonite??? Finding his twin brother hiding inside!!! Here's something else that is neat about this piece. The area of rock wall that we search in has two definitive shades of sediment, gray and yellow. The gray stuff tends to be a soft, crumbly clay. We find solid fossils in it, but you have to be careful or they'll break on you. The yellow is a better limestone, and this is what we prefer, so my son started his search right on the vertical line of separation between the two sediments. You can see this on the fossil itself and we think that is waaaay coooool!
  17. Lepidotes scales

    From the album Vertebrates

    Lepidotes scales from lower Cretaceous of Spain.