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  1. 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
  2. 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.
  3. 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
  4. 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
  5. Nautiloid

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

    From the album: Lower Devonian Helderberg Group in Eastern NY

    Hindia sphaeroidalis from the new Scotland formation
  6. 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
  7. 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
  8. 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.
  9. 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.
  10. 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.
  11. 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
  12. 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..
  13. 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
  14. 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.
  15. 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?
  16. 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
  17. 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
  18. 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
  19. From the Great Limestone, Pendleian (Upper Mississippian) of County Durham, UK. One for @Spongy Joe and any other sponge experts out there. There appear to be no sponges (apart from Chaetetes) recorded from this well researched limestone but I've collected over thirty over the past few years. There are several different types, generally fossilised as broken fragments though these can be quite large (several inches across). This one is a curved sheet, like part of a vase or dish, about 10 - 15mm thick. The outer (convex) layer contains a good pro
  20. part one cavaliersmithrslrstb20150476.pdf (less than 0,8 Mb) The name of the author, one of the big thinkers on the phylogenies of several phyla,was one of the things that attracted me to this piece part two:the response DufourMcIlroydiscussommerslcambrianeventexplosioediaca2017.pdf less than 1 Mb outtake: outtake from the response:
  21. BrainravediacarFirst(2012).pdf edit: about 3,8 Mb Notice the array of imaging techniques "Cyrogenian" is,of course,a typo Highly recommended to all those interested in early metazoan life Namibia is renowned(ever since the pioneering work of Hans Pflug)for its Neoproterozoic fossils Poriferan chemofossils had indicated the possibility of Precambrian porifera (Brasier et al/Geol.,1997):
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