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  1. LoneRanger

    Kentucky fossil -- sponge?

    I bought a number of invertebrate fossils from a Kentucky agate collector. These came without identification or info on specific site where found. I'm not familiar with Kentucky fossils but I believe this is a sponge (Porifera). Any confirming or alternative identification is appreciated. First and last photos are side views, second and third are top and bottom.
  2. Good morning! Asking for help identifying 3 fossils (two on one rock) found in riverbed in Val Verde county near Del Rio, Texas. The first 4 images are of one rock with two features. The shell imprint might be a Pecten Texana bivalve (from online fossil ID site)? The other feature might be some form of sponge like the family Clionaida?? Both features are covered with fine crystals giving a lovely glitter - any thoughts on how/why that process happened? Final three images I think are a random rock, but the shape does mimic an image online of a vertebrate toe-claw of some sort, so curious about this. Thanks in advance for any thoughts!
  3. SilurianSalamander

    What kind of sponge is this?

    Silicified sponge(?) fossil found in Wisconsin Paleozoic gravel. Likely Ordovician or Silurian, possibly Cambrian or Devonian. Thanks!
  4. Unfortunatly this is is a piece found at the outcrop bottom, no opposite mould available. Important: this is a DECALCIFIED specimen, so you see the calcified part negative. Ordovician, scale bar 5mm. 2 pics of the same specimen. Any ideas? Echinoderm? Porifera? Bryozoan?...
  5. SilurianSalamander

    Port Huron, Michigan trip

    I drive 8 hours with a friend to a location he remembers from his childhood as yielding a lot. Oh boy it did. 100% worth the drive. Lake Huron, among the agates, pyrite, yooperlite, has some extraordinary Devonian fossils. All fossils were collected from the beach of his family’s property except for the fenestelid bryozoan, which was found at a gas station on the way there. please enjoy this collection of gastropods, petoskey stones, various tabulate corals, crinoids, stromatoporoids, bivalves, Brachiopods, tenteculites, horn corals, an unidentified agatized fossil in jasper matrix, and a pudding stone I felt like showing off too. Thanks! I highly recommend the area.
  6. Deb in Michigan

    Middle Devonian Stromatoporoids

    These fossil stromatoporoids came from the Traverse formation, Potter formation, Bell Shale, and antrim/dundee formation locations near the north eastern tip of the Mitt in Michigan USA.
  7. DPS Ammonite

    Sponge

    Red chert radial sponge from the Pennsylvanian Naco Formation found north of Payson, Arizona. NB. Pennsylvan is a subperiod, epoch is Late and age is Moscovian. (Desmoinian under old system.) Dilliard, Kelly & Rigby, J.K.. (2001). The new demosponges, Chaunactis olsoni and Haplistion nacoense, and associated sponges from the Pennsylvanian Naco Formation, Central Arizona. Brigham Young University Geology Studies. 46. 1-11. geo_stud_vol_46_dilliard_rigby.pdf link
  8. I_gotta_rock

    What The Fossil?

    Found this in Big Brook, NJ (Late Cretaceous Navesink Fm.). It's about 2.5 cm wide. I don't even know what phylum to put it in. My first thought was bryozoan. There is one very thorough paper on Bryozoa of the Atlantic Coastal Plain, but it has nothing to fit the bill. Looks like sponge with those big holes. Found a picture of Discopora sp. that looks very close, but that genus is not listed in PBDB anywhere in North America. Gabb thought he had something similar from NJ, but it turned out to be a sand concretion. The last picture is the underside of the specimen, which may or may not be a thin layer of shell material from a bivalve.
  9. I_gotta_rock

    Any Porifera People Out There?

    I pulled this out of the Mahantango Formation of Pennsylvania a couple weeks ago. It's middle Devonain. TI though as I pulled it out of the scree that it was more of the myriad corals, but looking at it more closely it is most certainly not (although there are a couple Rugosa tucked in there), the structure is all wrong. I was told by one sponge enthusiast that it is definitely sponge. some kind of sponge. I'm a taxonomist at heart, and it drives me nuts if I can't at least narrow something down to a family. The literature on porifera is woefully scant, especially on this coast. Looking at the steinkerns in the holes, it looks like a network of narrow tubes rather than the pores of one big sponge wall. Could this be Amphiporidae? Anyone have any good references?
  10. I_gotta_rock

    A Few Micros

    From the album: Delaware Fossils

    A few of the hundreds of microfossils I found in one day of lying on the sandy spoils with a pair of reading glasses Coin is about 2 cm.
  11. Just a note that James Cullison's 1944 monograph on the rocks and fauna of the upper Lower Ordovician of Missouri and Arkansas is now freely available for download or perusal at https://archive.org/details/paper-cullison-1944-the-stratigraphy-of-some-lower-ordovician-formations-of-the This publication has always been devilishly tough to get a hold of. A nice systematic paleontology section deals with the many gastropods and other mollusks as well as the less diverse brachiopods, trilobites, and sponges. The monograph covers the following formations as currently accepted in Missouri: • Smithville Formation • Powell Formation • Cotter Formation • Jefferson City Formation Enjoy and share as you like. Full citation: J. S. Cullison, 1944: "The Stratigraphy Of Some Lower Ordovician Formations Of The Ozark Uplift." The University of Missouri School of Mines and Metallurgy Bulletin Technical Series, Vol. 15, No. 2, 112 pp + 35 pl.
  12. mbarco

    Small decalcified fossil

    Hi, this is a decalcified specimen (upper Ordovician - NE Italy). In order to understand the fossilization process of these specimens I've linked an image (Fig.1) of the internal mould of a Caryocrinitida (Rhombifera) with basal plates and stem facet preserved (from the same slab). So we're talking about the mould of the calcified parts of a living thing. Then I've linked some images of the specimen to identify: 2a-2b the whole specimen. 2c-2d I've carefully opened the slab. The "internal" part (?) 2e-2e_edit the "external" part (?) I'm wondering about a Porifera mould (never been found there). Or a coral mould? Bryozoan? ...? If it might be a Porifera I don't know if it's possible to identify the Class (Calcarea or Demospongiae). If the little "balls" are the mould of the identations of a syconoid sponge... Every little help is well accepted
  13. DPS Ammonite

    980 Million Year Old Sponges Found

    980 million year old soft sponges may have been found in a reef associated with microbiolites in Canada, pushing back sponge fossils 300 million years. The lack of a fully mineralized skeleton in the earliest sponges may make fossilization and recognition difficult. Turner, E.C. Possible poriferan body fossils in early Neoproterozoic microbial reefs. Nature (2021). https://doi.org/10.1038/s41586-021-03773-z https://www.nature.com/articles/s41586-021-03773-z
  14. This Missourian is headed out to the Late Devonian of western New York state and Pennsylvania this coming week and hoping for a little help from y'all on localities for eurypterids and the sponge Hydnoceras. Are Clarke's (1920) Hydnoceras localities at Brown Hill (near Cohocton, NY) and Irish Hill (near Bath, NY) still productive and accessible? Are Ehlers' (1935) eurypterid localities at Bush Hill (near Smethport, PA)? Or are there other spots I should be checking out? I understand that the Trimmers Rock Formation in the vicinity of Bloomsburg, PA, is also worth a look for eurypterids, but I don't have any pinpoints mapped. If you're local to the area and want to show me the way yourself, I'll gladly bring you some Missouri crinoids Thanks in advance . . .
  15. historianmichael

    Cliona cretacica

    From the album: C&D Canal Micro Fossils

  16. fossilizator

    Fragile Porifera

    Hello from Baltic Sea! In Svetlogorsk only one find this time. This is Porifera, i think. I don't know the age yet. Found her among the ferruginous sand. It is a sponge, but very fragile. By how did she survive all this time? Especially after falling off a slope... Inside, they have an interesting layered structure. The place of the find is marked with gloves. She fell from about 7 meters.
  17. Alternate title: I found Pennsylvanian fossilized Sesame Wasa Crispbread; is it safe to eat? I have visited the Pennsylvanian Naco Formation east of Payson, Arizona several times this long hot summer and found some interesting sponges. My most interesting find was this 5 cm wide sponge that looked almost exactly like a Wasa Crispbread with sesame seeds on top. I was about to nickname it a Wasa sponge until I found out that it had a genus name: Stioderma. Pennsylvanian Desmoinian Stioderma occur in Texas. Link It is amazing how many fossils I have identified from the Pennsylvanian Naco Formation by reading references from fossils found in Texas and Oklahoma: thanks. link to Collections I found a new 5 cm sponge that sort of looks like a horn coral, but it has spicules. The area contained the usual suspects such as this 165 mm long Wewokella solida Link. and this 50 mm Chaunactis olsoni that the Arizona Museum of Natural History expresses interest in and hopefully will get it.
  18. DPS Ammonite

    Stioderma Sponge

    Stioderma coscinum from Rigby and Mapes 2000. Sponges are common in the Pennsylvanian Naco Formation of central Arizona. A friend and I collected pieces of Stioderma sponges near Roberts Mesa. Stioderma sponges have a set of very distinctive features that make an ID much easier than other Arizona sponges. They have spicules that are distally modified into layered rounded pustules that are set atop a surface with funnel shaped holes. My sponge has an edge that curves under and is covered with pustules. Further research might reveal what species they are. Stioderma genus erected by Finks: Finks, Robert M. (1960). Late Paleozoic sponge faunas of the Texas region: The siliceous sponges. Bulletin of the American Museum of Natural History 120(1):1-160 found at http://digitallibrary.amnh.org/handle/2246/1220 Stioderma coscinum found in Desmoinian Age Millsap Lake Formation in Texas: Rigby, J. K. and Mapes, R. H. 2000. Some Pennsylvanian and Permian sponges from southwestern Oklahoma and north-central Texas. Brigham Young University Geology Studies, v. 45, p. 25–67. http://geology.byu.edu/Home/sites/default/files/geo_stud_vol_45_rigby_mapes.pdf Spanish Stioderma: Diego C. García-Bellido, & Rigby, J. (2004). Devonian and Carboniferous Sponges from Spain. Journal of Paleontology, 78(3), 431-455. Retrieved September 30, 2020, from http://www.jstor.org/stable/4094858
  19. DPS Ammonite

    Wewokella solida

    This is the largest Wewokella solida that I have found from the Pennsylvanian Naco Formation in Arizona. It is a thick-walled, sub-cylindrical, hollow sponge with simple mostly 4 to 2 pointed spicules. It is differentiated from the related Regispongia genus that has spicules with many more points, polyactine. Sponge is found from the Middle Pennsylvanian to the Early Permian in Arizona, Texas, Oklahoma, Utah, Ohio and maybe New Mexico. Description from Girty: “WEWOKELLA SOLIDA Girty. Plate I, figures 12-13b. 1911. Wewokella solida. Girty, New York Acad. Sci. Annals, vol. 21, p. 121. Wewoka formation: Coalgate quadrangle, Okla. Sponge body irregularly cylindrical, attaining a diameter of at least 25 millimeters. The center is occupied by a large tubular cloaca, the walls being about 7 millimeters thick and showing no evidence of being pierced by radial canals. A dermal layer, if originally present, has been lost. The walls are now made up of large spicules, which are doubtless typically 4-rayed, with one of the rays more or less reduced. Some of the others are perhaps aborted, so that many of the spicules seem to be irregularly branched. They are so interwoven as to make up a wall having considerable rigidity to augment which they may be partly cemented, although it is doubtful if they anastomose. The structure, then, though extremely varied in detail, makes on the whole a homogeneous wall which is apparently the same on the inside as on the outside. Among the large spicules are other much smaller tetraxons. Horizon and locality. Wewoka formation: Coalgate quadrangle, Okla. (station 2004).” Girty, G. H. 1911. On some new genera and species of Pennsylvanian fossils from the Wewoka Formation of Oklahoma. Ann. N.Y. Acad. Sci. 21:119-156. Link Redescription of Wewokella and creation of new related genus with polyactine spicules: Rigby, J. (1978). Two Wewokellid Calcareous Sponges in North America. Journal of Paleontology, 52(3), 705-716. Most recent paper describing Wewokella with good pictures: Rigby, J. K. and Mapes, R. H. 2000. Some Pennsylvanian and Permian sponges from southwestern Oklahoma and north-central Texas. Brigham Young University Geology Studies, v. 45, p. 25–67, 6 pls., 6 figs. Link They are found in Texas: Rigby, J. & McKinzie, Mark & Britt, Brooks. (2008). Pennsylvanian Sponges from the Graford Formation, Wise County, Texas. Journal of Paleontology - J PALEONTOL. 82. 492-510. 10.1666/07-060.1. PALEONTOL. 82. 492-510. 10.1666/07-060.1. Girty, G. H., 1915. Fauna of the Wewoka Formation of Oklahoma: U.S. Geol. Surv. Bull. 544:1-353.
  20. rcselke

    Possible Fossil Sponge

    I believe the specimen shown in the attached photos fell from a dump truck removing spoil from home excavations up the street from my residence in Gainesville, Prince William County, Virginia. This area lies within the Triassic-Jurassic Culpeper Basin. The specimen weighs 1.5 kilograms has a circumference of 33cm along its major axis, and 29cm along its minor axis. Based on images that are available on the INTERNET, I surmise that this is a fossil sponge. That said, I have absolutely no background or experience in Geology or Paleontology and would appreciate any information or insights members of this forum might be able to provide.
  21. From the album: Lower Devonian Helderberg Group in Eastern NY

    Hindia sphaeroidalis from the new Scotland formation
  22. Deb in Michigan

    calcareous sponge spicules

    I have read that finding spicules preserved in sponge is quite rare. I am finding sponge fossils with what I believe are spicules, but the fossils seem to be all calcium carbonate, no silica. this seems to me to show the original sponge body was aragonite or calcite based. This was found on the north eastern side of the tip of the Mitt in Michigan The area is considered Middle Devonian, but these were found on the shore of Lake Huron, so there is also the possibility that they are glacial transports. Comments welcome.
  23. JasT

    Missouri marine fossil ID

    Hello, Thanks to all for identifying my first of three 'mystery' fossil finds in Jackson County, Missouri. This second item keeps appearing in the chert used for landscaping at a building several decades old. As before I've been unable to identify it by photos on the internet for comparison. Any idea what they may be? I didn't want to break one in half and disturb the integrity of the piece. Thanks again.
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