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I am attaching two images of an Odovician receptaculite fossil from Scott City, VA. As it was considered to be a sponge when I acquired it I was thrilled because I had only previously seen disarticulated sponge spicules. There appears to be a more recent debate suggesting that receptaculites are algae. If one accepts the first image as the top of the fossil then the structure is consistent with sponge diagrams I saw in a high school Biology class. So how about some opinions on whether or not it is a sponge or fossil algae. So,is this the top? Or is this the top?
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Been finding a lot of these tiny spiral shells. While some are definitely gastropods this one looks similar to some forams I’ve seen. Would love to know which this one is! Thanks
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From the album: Ordovician Fossils
Amsassia algae? Taxonomy Phylum: ? Class: ? Subclass: ? Order: ? Family: ? Genus: ? Species: ? Author: ? Geology Eon: Phanerozoic Era: Paleozoic Period: Ordovician Epoch: Late Stratigraphy Series: Upper Ordovician Stage: Katian Series: Cincinnatian Stage: Richmondian Sequence: C5 Unit: ? Provenance Collector: mtz Date: 07/07/023 Location: SW Ohio -
From the album: Ordovician Fossils
Amsassia algae? Taxonomy Phylum: ? Class: ? Subclass: ? Order: ? Family: ? Genus: ? Species: ? Author: ? Geology Eon: Phanerozoic Era: Paleozoic Period: Ordovician Epoch: Late Stratigraphy Series: Upper Ordovician Stage: Katian Series: Cincinnatian Stage: Richmondian Sequence: C5 Unit: ? Provenance Collector: mtz Date: 07/07/023 Location: SW Ohio -
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Algae Porocystis globularis Glen Rose Formation
JamieLynn posted a gallery image in Member Collections
From the album: Texas Cretaceous Fossils : Various
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Porocystis globularis with Worm tube Glen Rose Formation
JamieLynn posted a gallery image in Member Collections
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From the album: Texas Cretaceous Fossils : Various
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From the album: Texas Cretaceous Fossils : Various
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Algae Porocystis globularis Glen Rose Formation
JamieLynn posted a gallery image in Member Collections
From the album: Texas Cretaceous Fossils : Various
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So yesterday, I found several associated verts to a large fish. It was partially exposed on the creek bottom and it had been awhile since the last rain, so tons of algae grew on it. I managed to pop it out in one piece and have begun trying to clean it up. Since fish and shale are sensitive when it comes to drying and wetting, I've kept it in water for the time being while I attempt to remove the algae. I will paraloid sections later once the algae is gone. I tried submerging the specimen overnight in about 2:5 bleach water solution to kill anything living on it. Afterwards I was able to scrub most of the larger bits of algae off, but there seems to be this millimeter thick layer of yellow algae/hardened matrix attached to the bone where it was exposed to water. I don't know if this is some calcium buildup or what, but it's tough to pry off and sometimes takes chunks of bones with it. I would try vinegar, but the fossil came out of what I believe to be Atco Fm, so even though the matrix has the appearance of shale, I would expect there to be some calcium carbonate in it that might dissolve. I'd prefer to have the vertebrae stay set in the matrix as the originally were if possible. The ultimate plan is to use the other side for presentation. One of the verts was offset and broke off the main chunk shortly after removal, so I could experiment a little with it first if needed. Thoughts? Thanks
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Protomelission is an early dasyclad alga and not a Cambrian bryozoan?
Oxytropidoceras posted a topic in Fossil News
520-million-year-old animal fossils might not be animals after all The specimens may be an ancient type of algae, not creatures known as bryozoans ScienceNews, March 10, 2023 The paywalled paper is: Yang, J., Lan, T., Zhang, X.G. and Smith, M.R., 2023. Protomelission is an early dasyclad alga and not a Cambrian bryozoan. Nature, published online, March 8, 2023 pp.1-5. Yorus, Paul H. -
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From the album: Walnut Formation
Porocystis globularis, Travis Co. Albian, Cretaceous Sept, 2022 -
These were found in a boulder used as rip rap along a rail bed here in Maine. I've never seen rock like it exposed in cuts along the route, so it may have been transported some distance. These are old photos, but I've donated the best examples to a local museum (Bates Museum, Hinkley, Maine) and the label on it was destroyed. Unfortunately I can't find the post, but I'm quite sure it was identified as a calcareous algae known from the Ordovician. Can anyone help me identify it so that I can inform the folks at the museum. It's a small museum and they don't really have a paleontologist.
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Hello again my good friends. I did a petrographic thin section in a marine consolidated sediment, and i found some elements that seems to be microfossils. It is worth noting that these sediments are in a mandatory-way marine since in all of them are marine bivalves fragments. I also was unsure if put this here or either in the microfossil zone of the forum, leaving it here because it is an ID question. For each I'll leave a views in PPL and XPL. Hopefully someone may be able to recognize them at least broadly, and tell apart them from being forams, big diatoms or even algae. Greetings from Chile !!!!! PD: Sediment age may range from middle Eocene into the Miocene Fossil 1: Fossil 2: Fossil 3:
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Fossil algae, dating from 541 million years ago, offer new insights into the plant kingdom's roots
GreatHoatzin posted a topic in Fossil News
https://www.sciencedaily.com/releases/2022/09/220920211225.htm- 1 reply
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Stromatolites are potentially present in every geologic period. Show any if you got 'em. The goal here is to represent every period, and every stage/epoch if possible, including subdivisions/periods of the Precambrian. These can be posted in no particular order. Any and all are welcome to post multiple examples from any period/epoch. I'll start with a specimen from the Pennsylvanian: Sniabar Limestone, Kasimovian/Missourian Stage, Pennsylvanian Kansas City, Missouri, USA The front side has been polished.
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A partial decalcified specimen from the Upper Ordovician. Scale bar: 5mm The image on the left shows 2 views of one mould, the image on the right shows 2 views of the other mould. Into the 2 moulds (expecially in the left one) you can see that the specimen has, almost sunk on its surface, a piece of ramose bryozoan (decalcified) and an echinoderm columnal (decalcified). We don't know if it could be some sort of sponge or calcareous algae, or other...
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Found in the stone steps at estabrooke park quarried from the Devonian Milwaukee formation.
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Found while splitting fossiliferous rock
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There have been other microbes freed from ice or salt before, but if these are indeed alive they shatter all records for oldest living things by about 600 million years!!! https://www.sciencealert.com/830-million-year-old-microorganisms-found-trapped-in-australian-rock/amp
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PBFossilAgae05.tif Pittsburg Bluff Formation (near Mist, Oregon) Late Eocene or early Miocene. I am finding a lot these tubular items in the matrix. Still waiting from the adapter for my good camera, this is from a 5 mpx camera. Since it is a marine environment, perhaps this is some type of Algae? On my 27" screen the yellow ring part has fuzzy hairs protruding. This was taken with a 5 mpx camera and a 10X objective.
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Hardly anybody ever talks about the Cambrian fossils of the southern midcontinent (USA). They're super-underappreciated. Show us what you've got! Here's one to start us off: Thorax and pygidium of a trilobite, possibly Orygmaspis, typically referred to as "Orygmaspis cf. Orygmaspis llanoensis" but probably a different species altogether. Note the two pairs of macropleural spines marking the final thoracic segments. Davis Formation (late Cambrian: Furongian), south side of Highway 8, St. François County, Missouri.
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Illusory erect spines(?) on a Kimmswick receptaculitid
pefty posted a topic in General Fossil Discussion
UPDATE: These seem to just be weirdly incomplete cross-sections through ordinary cylindrical meroms. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ This weekend in the Kimmswick Limestone in eastern Missouri (Pike County) I saw plenty of receptaculitid algae, mostly of genus Fisherites. But one cross-section has a feature I've never seen before: a fringe of what look like erect spines on the external surface. Can someone point me to a reference for understanding this feature functionally and/or taxonomically? I've looked in the usual places but I don't seem to be finding anything about spines. (If I were a vertebrate paleontologist, I would be saying they were feathers and proclaiming receptaculitids' "Sinosauropteryx moment.") Thanks.
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Location: n-e Italy. Probably Permian or Carboniferous. It's a fossil? Algae?
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The fossil was found near the Mukhavets River, Belarus, Brest. Length ~ 6-7cm (~ 2.5 inch) whole piece. If I registered here, I will be impudent: you can recommend a book (100 -200 pages), an introductory course in fossils.
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