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Showing results for tags 'Cystoid'.
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From the album: Mahatango Formation
Rare cystoid from the Mahatango, Niss Hollow member, Schykill county.-
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Cystoids from the Ordovician (485.4±1.9-443.8±1.5 million years).
Svetlana posted a topic in Member Collections
Hello to all. 4 cystoids from my collection. Found in the Leningrad region of Russia. Replaced by calcite. Size: from 25mm * 23mm * 17mm to 30mm * 30mm * 27mm. Have a nice day VID_20240128_100819.mp4 VID_20240128_100845.mp4 VID_20240128_100903.mp4 VID_20240128_100922.mp4 VID_20240128_100942.mp4 VID_20240128_100958.mp4 VID_20240128_101012.mp4 -
From the album: Oklahoma Paleozoic Fossil Finds
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The Cincinnatian Series (Upper Ordovician) is well known for producing beautiful echinoderms. The crinoids and edrioasteroids are probably best known, but some other weird groups do appear locally. This is a slab of Cheirocystis fultonensis, a cystoid that only occurs in a maybe meter-length interval spanning the base of the type Cincinnatian (uppermost Point Pleasant Formation into the Fulton Submember of the Kope Formation). I collected these last winter in northern Kentucky and just got them back from being prepped today. These are some of my favorite echinoderms – they're just so weird! As found in the field. I took this photo while waiting for the ice to thaw so I could safely lift the slab. After prep. They turned out very well!
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I collected this disarticulated cystoid from the Kimmswick Formation (Late Ordovician) in eastern Missouri. Cystoids are well outside my wheelhouse, so I was hoping someone here might be able to help me narrow down an ID, if one can be made at all from what's present. Thanks for any help.
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I collected a bucket of muck from my favorite ditch in Alpena (Michigan), and screen washed it. This is the Potter Farm formation. There have been some very interesting things to come out from it. Most of it I can give a basic ID to, but this one has me perplexed. A friend suggested they might be disarticulated pieces of a cystoid. I have never found cystoids before, so this is completely new territory for me. Does anybody have any thoughts? Front: Back: (Sorry about the pen! I misplaced my ruler. Needed something for scale.)
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- potter farm formation
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Pleurocystites squamosus with partial Isorophusella incondita
JUAN EMMANUEL posted a gallery image in Member Collections
From the album: Echinoderm Collection
Pleurocystites squamosus (Parseley, 1982 (?)) with partial Isorophusella incondita (Raymond, 1915 ) attached to the cystoid. Upper Bobcaygeon Formation, Middle Ordovician. Simcoe County, Ontario, Canada. Plate is 11cm long. -
I cannot figure out what is this fossil. Can anyone help me for ID? I found it in an area in Norway in the Oslo field, ordovicium or silur area. Could it be a part of sea-lily?
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- early paleozoic
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I collected this rock slab two years ago outside Napoleon, Indiana, and didn't get around to identifying the two "rings" until this week, when I asked two members of my fossil club for their help. What we have are two specimens of cyclocystoid in the same slab. Each is about 12mm in diameter. Because I collected this from spoils piles, I can't pinpoint the period, but my guess is Silurian or Ordovician. There's no evidence of the peripheral skirt, plates or radiating lines from the center. Only the cupules. I will call on another club member to see if he can do any cleaning that might reveal more of these specimens. I'd appreciate any help you can provide regarding genus and/or species.
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In order to ID a find of mine, I came across an article that appears to have my answer. Does anyone possibly have access to this? I can't seem to get it: Carabocrinid crinoids from the Ordovician of northern Iowa and southern Minnesota Thanks, Mike
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Amecystis laevis (Ulrich and Kirk, 1921). Upper Bobcaygeon Formation, Middle Ordovician. Simcoe County, Ontario, Canada. This specimen is among the ten specimens on a hash plate that was won in a bid and bought over online auction site. The specimen is missing the two tentacles at the top of the head. Length of the specimen was measured by using a measuring tape.
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Hello everyone, these fossils are quite common in at least one Czech locality of Bohdalec formation (upper Caradoc/Beroun) and I wondered if anyone has seen anything similar somewhere. The fossils are lentil shaped, with a thin egg-like shell that could be cracked and removed to expose inner layer of different color and structure. The size is 1 to 4 mm in diameter. I've consulted some experts and although they've all encountered similar fossil, they have no idea what it is. One of the opinions was that it could be a juvenile cystoid of some sort, for example Echinosphaerites seems to be common in this formation, although never found on this locality. However no one seems to have done any research into this yet. Associated fauna are small cyclopygid and illaenid trilobites, small brachiopods, graptolites, bivalves and ostracods. Thanks in advance for your thoughts Ondrej
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From the album: Silurian Fossils - Giles County Tennessee
Caryocrinites cystoid fossil found in the Waldron Shale in Giles County, Tennessee. The cystoids resembled crinoids, but they had an ovoid, rather than cup-shaped, body. The mouth was at the upper pole of the body, with the opposite end attached to the substratum, often by a stalk, although some stalkless species did exist -
From the album: Other Fossils
Here is a Pleurocystites sp. from the Cummingsville Formation of the Galena group of Southeast Minnesota.-
- Cystoid
- Ordovician
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