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Found 1,010 results

  1. Genal spine?

    Came across this small fossil (4mm). It appears to be a ventral genal spine, but I could be wrong. Upper Ordovician. Any idea what species?
  2. Trilobite Plate Fragment from MN Decorah?

    I found this chunk of shale poking around a bluff side a while back near Lilydale Park in Minneapolis, MN. The fragment pictured is translucent and is slightly concave, it reminds me of a cheek plate but Im not sure. I'm new at this so I'm pretty clueless, I appreciate any help.
  3. Tiny cephalon ID

    I was going through some rocks I found last year and came across this tiny cephalon I never noticed before. I believe this is Ft Atkinson formation , Ordovician. Cephalon measures only 1mm and is covered in tubercles. I'm wondering because of size would this be considered protaspid? Any help with ID appreciated.
  4. Here presents probably the first complete lobopodian fossil from Fezouata Formation, it is under describing at the moment. Outline looks very similar to Luolishania + Diania from Chengjiang Biota. Truly amazing creature.
  5. Thelxiope sp.

  6. Acquired one in 2018, which I believe it should be a Calvapilosa kroegeri, or the 'armored worm'. Any ideas on this ID? Related link: https://www.theguardian.com/science/2017/feb/06/newly-discovered-slug-looks-like-a-hairy-toe-and-could-reveal-the-ancestry-of-molluscs-calvapiloa-kroegeri
  7. A type of Paleoscolecid worm, not described yet. Related link: https://www.researchgate.net/publication/299613058_Palaeoscolecid_worms_from_the_Lower_Ordovician_Fezouata_Lagerstatte_Morocco_Palaeoecological_and_palaeogeographical_implications
  8. Thelxiope like creature from Fezouata Shale, described by Peter Van Roy 2013. It looks very similar to the Burgess one: Thelxiope palaeothalassia LINK: https://burgess-shale.rom.on.ca/en/fossil-gallery/view-species.php?id=123
  9. My collection of Enosiaspis hrungnir so far: Animalia; Arthropoda; Trilobitomorpha; Trilobitoidea; Marrellomorpha; Acercostraca; Vachonisiidae Determined by: David A. Legg, 2016
  10. Here presents three rare arthropods acquired from Fezouata Shale: Brachyaglaspis singularis gen. et sp. nov., which is described in 2015 for the first time. The paper is: 'A new aglaspidid euarthropod with a six-segmented trunk from the Lower Ordovician Fezouata Konservat-Lagerstätte, Morocco'. The first shows pretty nice outline of this aglaspidid, the third one is quite crappy...Fourth picture is the reconstruction of this type.
  11. Leanchoilia sp.

    Here presents two Leanchoilia sp. from Morocco: Left one is dorsal view and the second one is later view. It shares almost the same features as the common type.
  12. Early Ordovician fossils

    These are pretty rough fossils. I haven't found a decent specimen yet, but ive ran into a few of them the last few months. Most likely gasconade formation (earliest bed of Missouri Ordovician ) cephalopods are a guess but I'd like your opinion. Are they known in 480 million year old tropical seabeds? Im not familiar with the details. Give me the run down on these fellas.
  13. Unknown Ordovician organism

    I recently acquired an Ordovician rock from an antique shop near my house. It is a dark shale with cryptolithus and what I think are isotelus trilobites on it as well as brachiopods and graptolites. I am unsure which formation or even where it is from but it has this strangely shaped creature that I have not been able to identify. The creature has tiny indents all over its surface.
  14. Central Missouri

    Found a few beautiful pieces in rocks dug up by the local water department.surface exposure is Gasconade dolomite so i assume these are actually late Cambrian. But im not sure how deep in the ground they came from. Either way. I love these rocks and thought I'd share them with you. A lot of the pictures are different angles of the same rock. But theres a few of a second rock. I think i found and cleaned 4 rocks. Just didnt get pictures of all of them. Hope you enjoy. Happy hunting.
  15. Mitrocystites mitra BARRANDE, 1887

    From the album Invertebrates

    Mitrocystites mitra BARRANDE, 1887 Ordovizian Sarka Formation Rokycany Czech Republic
  16. Ordovician fossils in PA

    Hi everyone, I recently remembered the location of swatara Gap in Pennsylvania, I remember reading about it but the problem is that the site was covered up way before I was even in the United States, there is the swatara state park nearby but that has younger Devonian rocks of the mahantango. My question is are there any similar sites with Ordovician rocks anywhere in PA? I am especially interested in the Cryptolithus trilobites and if those can be found anywhere else around here as that would be a wonderful fossil to add to the collection and have the experience of uncovering. Thank you, Misha.
  17. Bryozoa or something different?

    Hi All, I picked up this rock in my back yard a couple of days ago. I picked it up because I saw a couple cross sections of rugose coral and some fenestrate bryozoan fossil pieces. When looking at it later, I noticed this feature. I haven't found anything like this before. Is this just a different type of bryozoa? These little marks also look like some tiny Platycrinite crinoid pieces. This was found in Howell County, Missouri, USA. It came from the Ordovician Period. These lines measure approximately 23mm in length and measure approximately 0.79mm wide. The individual spots are oval in shape and measure approximately 0.38x0.79mm. I don't know if it shows well in the first image, but this feature appears to be in a fracture in the host rock. There is still some rock covering the feature in the fracture. Any assistance or direction that you can give me is greatly appreciated. Thanks for your time, Doug
  18. Does anyone have experience with the Middle Ordovician brachiopod faunas of the upper Mississippi Valley? I came across this odd fragment in rocks from a quarry in south-central Wisconsin. To my knowledge they are known in North America only from the Appalachian Basin (Tennessee, Virginia, West Virginia, Pennsylvania, Quebec, Newfoundland), not the interior basins like the Illinois basin. Has anybody else seen this critter or similar in the Platteville? As far as I am aware, the only species documented from the Platteville that looks anything like this is Megamyonia unicostata, but that has a single costa rather than the several apparent here and in the types of Ptychoglyptus. Platteville Fm, probably in P. undatus biozone = Upper Ordovician, Sandbian stage (old North American Turinian Stage)
  19. Edrioasteroid

    Here are two Edrioasteroids from the Verulam Fm. (Ordovician) near Brechin, Ontario, Canada. The first one might be Isorophusella? (specimen is 1 cm in diameter). The second one may not have enough present for ID: @crinus
  20. As fall has finished dropping leaves and caused Poison Ivy and most insects to go dormant, I have been exploring some prospects in the Paleozoic of Central Pennsylvania. On one trip back to help my folks get a Christmas tree, I had time to spend and hour or so at an abandoned quarry that exposed Ordovician aged rock. Unlike the exposures of Ordovician rock in the Cincinnati/Louisville region of the US, or southern Ontario, or the Minnesota/Iowa area, Central PA is not know for heaps of fossiliferous limestone or shale. One has to do a little research to find what formations have fossils, and then try and find an exposure that you can prospect. I found one such quarry from an old guidebook out in Cumberland County, PA. It has exposures of the Chambersburg formation which is known to have fossils and is also known to have a bed of rock that contains an unusual Echinoderm called "Nidulites". My goal was to verify if fossils were present at the site and then try to locate the "Nidulites" bed. View of the quarry wall. The rock was tilted NE in one direction (away from the camera) and N in another direction (to the left of the photo). I started at the south end of the quarry (right side of pic above) and started to look through the fallen scree and exposed rock layers. Not finding anything I moved north along the walls of the pit until I started to find some hints of fossils in the rocks. Mostly cross sections in massive limestone, but at least there were fossils there. This is what it looked like along the walls and in the talus along their base. There were multiple pieces of limestone with Calcite crystals, both massive and crystalline, in some areas as the veins filled in cracks within the rock ages ago . I found one piece that had a couple of small Fluorite cubes on it, a rare find in the field! I finally started to find some fossils in the talus concentrated in one area but could not figure out the layer they came from. Preservation was ok but as they came from fractured massive rock, completeness was not the best. Here are my finds: Leptanea sp. Brachiopod Sowerbyella sp. Brachiopod Possibly part of an Isolteus sp. genal spine Unknowns So not too bad for a couple of hours of looking. I'll have to visit the quarry again in the future and see if I can find more in the talus and maybe trace the bed that the better fossils come from. No "Nidulites" either, but I am not discouraged. I confirmed that fossils can be found here, I just need to do some more looking.
  21. Ontario Edrioastreroids

    I didn't take part in the Secret Santa this year but it almost feels like I did, as I received a package from @Nimravis the other day (not a surprise, I knew it was coming, but the timing was right for Christmas) - Edrio's from the Bobcaygen formation. Thanks again Ralph! I could us a bit of help with IDs. I guess they could use a bit of prepping to make them easier to see, but maybe someone can recognize them the way they are. I figure #3 is Belochthus orthokalus, and #4 is Cryptogoleus chapmani, but not sure of the other two. Is #1 a smaller Belochthus? It looks like there are two there but the 2nd one is even more buried so it may not be identifiable. And is #2 a larger Cryptogoleus, or something else? Also, what is the small discoidal bryozoan?
  22. Graptolite?

    Locally, graptolites are very common in the Maquoketa/ Ordovician rock. They present themselves as 2 dimensional creatures on certain bedding planes. Below the Maquoketa is our Galena. It has graptolites but uncommon. Again, they present themselves as 2 dimensional. The "unknown" specimen from the Galena, presented today, is obviously 3 dimensional and I venture a guess that it is a Graptolite. But I thought I would seek opinions in that I have seen thousands of local graptolites but never one that is 3 dimensional. Could it be something else??
  23. Lagynocystis pyramidalis (BARRANDE, 1887)

    From the album Invertebrates

    'carpoid’ echinoderm Lagynocystis pyramidalis (BARRANDE, 1887) Ordovician Šárka Formation Rokycany Czech Republic