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Found 10 results

  1. While cleaning out some stuff, I found one of those toy cameras that click between slides. These things are only a few bucks for a twelve-pack, and I probably got it from someone’s birthday party when I was little. The magnifying lens works quite well for the price. Tested it on some crinoid bits with epibionts. Hederella filiformis on a crinoid bit. Ascodictyon sp. on a brachiopod fragment. Bryozoan encrustation on a crinoid stem fragment. Some more Hederella on a crinoid stem. Two views of a crinoid holdfast and bryozoan on a Aulocystis jacksoni. Some more Ascodictyon sp. A few more crinoid holdfasts on crinoid stems. A picture of the lens, and the crinoid bits with a nickel for scale. And lastly, my tiny enrolled meraspid Lonchodomas mcgeheei.
  2. Tidgy's Dad

    Wenlock Weirdies.

    Hello, everybody! I have been sorting through my wenlock limestone material, Middle Silurian and have a couple of personal problematica. I am wondering if any of you brilliant folks could help me out. Here is an object which seems to be an epibiont on a Favosites coral. 5 mm long and about 1.5 mm diameter at the widest. Is it a cornulitid ? Or a single corallite of Aulopora? Something else, maybe? And another one? On a solitary rugose coral. 3 mm x 1 mm. And an example of Aulopora from Wiki to compare : And a cornulitid that looks a bit similar : I would be very grateful for any help. Then there is this. Is it the worm Keilorites? Length 1.9 cm, width 2.5 mm max.
  3. Misha

    Petrocrania

    From the album: Misha's Middle Devonian Fossils

    Petrocrania hamiltoniae on Spinocyrtia granulosa Givetian Windom Shale Mbr. Moscow Fm. Deep Springs Road Quarry, Central NY
  4. I just finished cleaning this Heliophyllum confluens (Colonial Rugose Coral) Middle Devonian, Hamilton Group, Jaycox Member. Western New York. 6" x 4" x 4.5" and its covered in epibionts. Most I know - 1. Brachiopod (Petrocrania hamiltoniae) 2. Bryozoa (Lichenalia stellata) 3. Crinoid Holdfast 4. Bryozoa? Coral?_________? 5. Coral (Pleurodictyum) 6. Crinoid Holdfast? Bryozoa (Fenestrate) Holdfast? Any help with numbers 4. and 6. is appreciated.
  5. Hello together, a friend of mine found this beautiful Myophorella in Portugal, I do not have any Information about stratigraphy except that the genus is jurassic till cretaceous. I think the ID to genus of the big bivalve is unquestioned (although a species would be nice.) What I wonder about are the little bivlave-like things clinging to the shell. To me they look more like epibionts than random taphonomic guests, they also look like tiny bivalves. Maybe young of the same species ? Did they grow in that way? I Havent found clusters of Myophorella in a picture search. Thanks for your knowledge. Best Regards, J
  6. From the album: Fossildude's Middle Devonian Fossils

    Middle Devonian Mahantango Formation. Swopes Farm/Turbotsville borrow pit. Turbotsville, PA.

    © 2021 Tim Jones

  7. Hi all, Upon examining some of my finds from this hunt about a month ago, I realized that there was an anomaly on one of the Neuropteris ovata pinnules. Initially I brushed it off as nothing more than an anomaly, but last night while I was doing some reading I came upon an intriguing paper on insect galls from the Carboniferous. Some of the gall fossils included bore a striking resemblance to the gall on my frond, and so I figured I would make a post to see if any of you had an idea on what it could be. Here is the frond, in full view: Closer inspection of one of the pinnules reveals a small, oval-shaped bump: This bears a striking resemblance to some of the galls included in this paper (it is not paywalled). Specifically, it resembles #7 in the first figure. I hesitated to include the image directly in this topic so as to not violate any Forum rules (if it is not a violation I can include it here as a reply). https://www.researchgate.net/publication/250613622_The_Seeds_on_Padgettia_readi_are_Insect_Galls_Reassignment_of_the_Plant_to_Odontopteris_the_Gall_to_Ovofoligallites_N_Gen_and_the_Evolutionary_Implications_Thereof Although it superficially resembles a gall, I am looking for other opinions as I have no experience in this field. Here are my thoughts on why it could, or could not be a gall: It could possibly be a gall for multiple reasons. First off, the morphological similarity is quite striking. Secondly, the paper states that ", occurs commonly on a variety of seed-fern foliage throughout the late Middle Pennsylvanian to Early Permian". This is from a late Pennsylvanian deposit (Connellsville Sandstone of the Conemaugh group) so it fits quite nicely into that time frame. Also, epibionts are quite common in this deposit, specifically Microconchus. They are preserved in a relatively similar fashion (mold-cast). There are a few reasons why it could also not be a gall. First of all, I have never heard of galls coming from deposits in the Appalachian basin, though this may simply be due to my own ignorance and/or a lack of literature. Also, this anomaly is isolated, which is a derivation seen from many of the galls included in the above paper. Finally, random nodules and concretions do occur sporadically throughout this deposit, so it could always be mineral growth. And finally, my simple lack of knowledge prevents me from making a confident ID either way. So, what do you all think? I'd love to hear some of your opinions as to what it could be! And on the off chance that it is a gall, should this specimen be donated?
  8. Missourian

    Epibionts And 'xenobionts'

    Does anyone know of any instances -- or suspected instances -- of organisms that are known only from associated fossils, i.e. organisms that left absolutely no trace (i.e. 'xenobiont'), but are detectable from various epibionts that were once attached? In the Pennsylvanian of Kansas City, there are thin limestone beds in the lower Wea Shale that contain an abundance of Crurithyris brachiopods and ammovertellid forams that range persistently at least for several tens of miles. From south Kansas City, MO: From Excelsior Springs, MO, approximately 30 miles to the north: The ammovertellids are the little white things, and the Crurithyris are the bluish bb-like shells. Normally, in other strata, these fossils are sparse or only locally present. I didn't think much of these beds until I read that both fossil types have been found as epibionts attached to calcareous algae (both) and echinoids (Crurithyris). (See http://palaios.geoscienceworld.org/content/18/4-5/435.abstract and PDF at http://www.kgs.ku.edu/Current/2005/sawin/sawinandwest.pdf (page 9) ). This made me wonder if there were some soft bodied organism (perhaps sea-grass-like algae) that were present in abundance but left no trace -- carbon films, impressions, root/holdfast impressions, etc -- but did leave behind a mess of formerly attached shells. I can imagine vast 'gardens' stretching over wide expanses of the shelf.
  9. Mediospirifer

    Community on the Half-Shell

    I love finding multiple fossils. I don't just mean multiple specimens in a single rock, I mean fossils that show evidence of more than one life-form. Shells with burrow traces, for one example. Dung beetle balls. Predation marks. And particularly, epibionts. Here I have a fairly ordinary specimen of the brachiopod Tropidoleptus carinatus. Ordinary, that is, until a closer look is taken.... This specimen supported an variety of other critters on its pedicle valve. Whether the epibionts took hold while the brachiopod was alive, or colonized the dead shell, I don't know; I would speculate the former, as the brachiopod is articulated. I think it is likely that the whole living community was buried together by mud. So who's here? Let's take a closer look. We have several examples of Cornulites hamiltoniae. Some are (relatively) large, while others are very small: Two more Cornulites pictures, then we'll see who else lived here!
  10. Manticocerasman

    Epibionts on ammonites

    This weekend Natalie found an intriguing fossil: a Hypoturrillites whit an epibiont on the shell. I've rarely seen this kind of association and it makes me wonder if the epibiont was already on the shell when the ammonite was alive or dit it grow on it after it fell on the sea floor. If anyone has papers on the subject it would be greatly apriciated ( @doushantuo maybe? )
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