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  1. 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
  2. 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
  3. 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
  4. historianmichael

    Cliona cretacica

    From the album: C&D Canal Micro Fossils

  5. DPS Ammonite

    APG Arizona Sponges

    This is a work in progress. I will be adding multiple photos over the next day or so. This is part of my Arizona Paleontology Guide. My collection of Arizona sponges. Self collected unless noted. Actinocoelia maeandrina Finks 1960 Permian Kaibab Limestone Coconino County, Arizona north of Pine. 13 cm wide. link link Other side of Actinocoelia above. Permian Kaibab Limestone Coconino County, Arizona, north of Pine. 13 cm tall. link Chaunactis olsoni Dilliard & Rigby 2001 Pennsylvanian
  6. 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.
  7. 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 Pennsy
  8. 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. S
  9. 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 Yo
  10. 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
  11. Nautiloid

    322BF84E-6FF9-4D8B-837C-AEE85DC5479A.jpeg

    From the album: Lower Devonian Helderberg Group in Eastern NY

    Hindia sphaeroidalis from the new Scotland formation
  12. doushantuo

    The Jurassic of Europe

    PDF BIOSTRATIGRAPHIE DU JURASSIQUE OUEST-EUROPÉEN ET MÉDITERRANÉEN Zonations parallèles et distribution des invertébrés et microfossiles Elie CARIOU & Pierre HANTZPERGUE memoire 17 Elf exploration & Production @Coco @michele 1937 @fifbrindacier typologie:ouvrage synthetique,et:utile,probablement edit: pour probablement,lire: peut etre Useful stratigraphic information in this one edit 2: ca. 31 MB,alors:large
  13. SPONFLORA From animal to plant kingdom: the alleged sponge Siphonia bovista Geinitz from the Cretaceous of Saxony (Germany) in fact represents internal moulds of the cone-like plant fossil Dammarites albens Presl in Sternberg Birgit Niebuhr Bulletin of Geosciences 94(2), 221–234 (7 figures, 3 tables). size:about 14 Mb
  14. 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.
  15. 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.
  16. 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.
  17. JasT

    Missouri marine fossil ID

    Hello, I live near west Jackson County, Missouri. I found this fossil while I was walking my dog. It was part of the landscaping for the front of a building that has been there for 20 years or more. No one knows the origin of the material for the landscaping. Lots of reading, I found most of the chert in the landscaping has crinoids as a point of the time period, Devonian? Can't find any photos to compare it with on the internet, been trying for 2 months, a crash course on paleontology 101. I see Missouri in a different light from it all. Can this be identified? Thanks for the opportunity to s
  18. Zumbergloverohrsreetalproxyporifer.2018online.pdf Demosponge steroid biomarker 26-methylstigmastane provides evidence for Neoproterozoic animals J. Alex Zumberge, Gordon D. Love, Paco Cárdenas , Erik A. Sperling, Sunithi Gunasekera, Megan Rohrssen, Emmanuelle Grosjean, John P. Grotzinger and Roger E. Summons Nature Ecology & Evolution 10.1038/s41559-018-0676 inherently interesting..
  19. Linus

    Sponge on a stick...

    Hi again, Didn't think I should bother you guys with another sponge, but this is a bit peculiar and I can't find anything about sponges on sticks? This was found in the Kristianstad Basin, Cretaceous period. It is heavily erroded and mineralized, but probably a sponge. It seems to have a circular growth around what seems to be a stick of some sort. They seem proprotional, so I figure they grew together, but they might not be the same spieces? (the stick + the sponge). The images does not make the fossil justice, but it is a very voluminoes sponge with b
  20. Linus

    Porifera indet.

    From the album: Sponges, Kristianstad Basin

    Upper Campanian, Cretaceous I thought this was a Callopegma aucale, but now am unsure. (See discussion below) I've used this ref for identification ->LINK I've concluded from other sources that the area where this sponge was found - does indeed belong to the (lower) Upper Campanian. About 16cm at the base and 17.5cm at the diagonal.
  21. I came across this unusual fossil on a recent collecting trip to Southwestern Wisconsin. It was attached to a hash plate containing mainly brachiopod fragments. It appears to be some type of sponge that I have never encountered before. It is roughly the size of a tennis ball with an opening at the top. There is also a smaller round opening on one side that might have been from predation. Any thoughts on what this might be?
  22. 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
  23. Hello, all! I'm working on an article presently about the existence of glass sponges in the Hamilton Group in New York state. The publications that I have found, most notably, The Great Glass-Sponge Colonies of the Devonian; Their Origin, Rise, and Disappearance, (Clarke, 1920)1 dispute their existence in the Hamilton group altogether. Recently, an example of an indet. Hexactinellida was presented to me from the site, and mention has been made of several others over the past 20 years having been found. I am wondering if anyone here in their vast array of experiences has
  24. DPS Ammonite

    sponge reference

    Does anyone have access to this reference to help me ID Arizona Pennsylvanian sponges. Please PM me. Wewokella and other sponges from the Pennsylvanian Minturn Formation of north-central Colorado JK Rigby, SB Church Journal of Paleontology 67 (6), 909-916 Thanks, John
  25. DPS Ammonite

    Arizona Sponge

    I found a sponge in the Pennsylvanian Naco Formation north of Payson, Arizona. It may be the same species as an earlier find although instead of pancake form it is a conical form: http://www.thefossilforum.com/index.php?/topic/82186-knocking-about-the-naco-pennsylvanian-sponges-and-corals/&tab=comments#comment-871386 The first photo is of the convex outer surface. Part of top is broken off. Longest length of the sponge is 8cm. Any ideas as to identity? @Arizona Chris See photos in additional posts since I am doing this on a phone and cannot reduce file s
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