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Showing results for tags 'crinoid'.
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From the album: Northern's inverts
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From the album: Northern's inverts
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From the album: Northern's inverts
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Crinoid stem segments, Devonian Keyser formation, PA
traveltip1 posted a topic in Fossil Hunting Trips
Crinoid stem segments exposed by February rains, from the Devonian, Keyser Formation limestone, in South Central Pennsylvania.
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An unusually complete specimen although crowns are well known from this location. It has a very short stem consisting of only six or seven columnals, all of which bear cirri. Once thought to be an early comatulid, it is now thought to belong to a separate lineage of nearly stemless pentacrinitids (Hess 2014). References: Simms, M.J. 1989. British Lower Jurassic Crinoids. Monograph of the Palaeontographical Society, London:1-103, pls.1-15 (No. 581) Hess, H. 2014 Origin and radiation of the comatulids (Crinoidea) in the Jurassic. Swiss J Palaeontol 133, 23–34 Hess 2014 Origin…comatulids This was Invertebrate/Plant Fossil of the Month March 2015
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Death assemblage of rare Oligocene crinoids, Isocrinus, ---ALSO, I'm pointing at an unidentified starfish; there is also a second in the center of this image
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- crinoid
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tertiary crinoid. Articulated tertiary specimens, very rare Lit.: Moore, R. C. & Vokes, H. E. 1953. U.S.Geol.Survey Prof.Paper. 233-E: 124, Pl 23, fig 1, 3.
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I picked up this weird fossil at the quarry in St Paul, IN last year, found as is: on the ground, split in half. It seems to be studded with crinoid holdfasts and bryozoan encrustations. Any ideas what it is? Under magnification it is a beautiful specimen. Also, I'm tempted to sand/polish one of the halves to possibly bring out some details. Would this be advisable? Thanks for any help.
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Is there anyone who would possibly agree that this fossil might not be from a crinoid? The dimensions are about 3cm long and up to 2cm wide. After viewing numerous fossils of this sort, in a Leonardian formation, they are rarely, if ever, found in groups of more than three, and the occurrences always look the same as in the images attached. If there is no doubt that it is a crinoid, would you please post which might show a convincing likeness? Other than curled arm or columnal (stem disc) I am at a loss and by far much less than a novice paleontologist. Thanks for any help and forgive me if my terminology is not spot on.
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Iowa lawmakers: After 500 million years, crinoid fossils deserve recognition. William Petroski, Des Moines register, Jan. 19, 2018 https://www.desmoinesregister.com/story/news/politics/2018/01/19/iowa-state-fossil-crinoid/1047564001/ Yours, Paul H.
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Today while driving around I saw a coin store that also sold fossils, so I thought that I would stop in and look around. Whenever I go into a little store I don’t just like to browse around without out purchasing something to help the small business owner. So I decided to purchase this little piece that was ID’d as Sarcocrinus granilineus from Crawfordsvile, Indiana. The piece appears to be original and nothing added, but I am not sure of the name. I am not a real crinoid collector, but I could not find this species on the internet. In addition, to me the 2 caylx look different to each other.
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From the album: MY FOSSIL Collection - Dpaul7
Crinoid stem with side arm SITE LOCATION: Harpersville Formation, Coleman County, Texas, USA TIME PERIOD: Pennsylvanian Period (299-323 Million Years ago) Data: A crinoid stem in matrix, with other stem sections. Crinoids are marine animals that make up the class Crinoidea of the echinoderms (phylum Echinodermata). The name comes from the Greek word krinon, "a lily", and eidos, "form". They live in both shallow water and in depths as great as 9,000 meters (30,000 ft). Those crinoids which in their adult form are attached to the sea bottom by a stalk are commonly called sea lilies. The unstalked forms are called feather stars or comatulids. Crinoids are characterised by a mouth on the top surface that is surrounded by feeding arms. They have a U-shaped gut, and their anus is located next to the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, most crinoids have many more than five arms. Crinoids usually have a stem used to attach themselves to a substrate, but many live attached only as juveniles and become free-swimming as adults. There are only about 600 extant crinoid species, but they were much more abundant and diverse in the past. Some thick limestone beds dating to the mid- to late-Paleozoic are almost entirely made up of disarticulated crinoid fragments. Kingdom: Animalia Phylum: Echinodermata Class: Cridoidea -
This was found in a riverbed in Indiana three decades ago. I have yet to figure out exactly what it might be. A gem show expert said it was a Crinoid Sea Lilly but it does not really match Sea Lilly photos posted on line. It is 4 1/2” long, 7” around and weighs 320 grams. Thank you so much for your input!
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I am wondering if this is a fossil of a crinoid of some type. I found this is a creek in NE Oklahoma. I believe that most stuff is from the Devonian and Carboniferous time. It is in the harder dense material with a conglomerate of shells and other things on top .
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I thought I was joining my husband in his kingdom of Pareidolia when I thought there were mold or trace fossils, which I now know as ichnofossils, on some of my sherds from time to time. I have no idea how long it takes for such fossils to form, and I often don't have a guess as to how old a sherd might be or how long it could have been in the ground or water, but I am changing my mind. I see fossils on my sherds and I'm not crazy (well....)! I hope these examples are photographed well enough for you to see them, too. I'm very curious if this is common and if I can date the sherds according to the fossils.
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good evening this came from a creek in travis county with plenty of volcanic ash fossils and mollusks. Any iformation appreciated
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From the album: Fossils from Arisaig Nova Scotia
The scyphocrinus were floating crinoids and their holdfast was actually an air bladder that supported multiple stems and calyx. -
I'm getting braver and will venture that there is at least one crinoid columnal mold preserved in this formation. I'm fairly certain, however, that the other two most prominent molds are not of a crinoid. How am I doing?
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Well I got a new phone (Samsung Galaxy Note 8) on Black Friday and was playing with it snapping some pictures. Those of you that have been to my house know that I am totally disorganized and definitely need to organize my fossils. Thought I would share some of the disorganized chaos that is my basement fossil dumping area. This tends to be where fossils go to rest if they do not make it to the glass display cases (3) upstairs where I put the good stuff. But then that is a step up from the ones that never get out of the map drawers and boxes in the garage. One of these days I will get around to organizing things, just never happens to be today....... I suspect my kids will end up having to organize it someday......... (That's a scary thought)
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From the album: MY FOSSIL Collection - Dpaul7
Graveyard Fossil - with Trilobite Appendage SITE LOCATION: Chesterian Zone of the Bangor Limestone Formation in northern Alabama TIME PERIOD: Mississippian Period (ca 325,000,000 years old) A "Graveyard" style fossil; many animals here. Both sides of the specimen show bryzoan remnants, some crinoid, Mollusk and Bryzoan remnants. -
From the album: MY FOSSIL Collection - Dpaul7
Graveyard Fossil - with Trilobite Appendage SITE LOCATION: Chesterian Zone of the Bangor Limestone Formation in northern Alabama TIME PERIOD: Mississippian Period (ca 325,000,000 years old) A "Graveyard" style fossil; many animals here. Both sides of the specimen show bryzoan remnants, some crinoid, Mollusk and Bryzoan remnants. -
From the album: MY FOSSIL Collection - Dpaul7
Crinoid - Phanocrinus formosus SITE LOCATION: Chesterian Zone of the Bangor Limestone Formation in northern Alabama TIME PERIOD: Mississippian Period (ca 325,000,000 yrs old) Data: Crinoids are marine animals that make up the class Crinoidea of the echinoderms. The name comes from the Greek word krinon, "a lily", and eidos, "form". They live in both shallow water and in depths as great as 9,000 meters. Kingdom: Animalia Phylum: Echinodermata Class: Cridoidea Order: †Cladida Family: †Synerocrinidae Genus: †Phanocrinus Species: †formosus -
From the album: MY FOSSIL Collection - Dpaul7
Crinoid - Phanocrinus formosus SITE LOCATION: Chesterian Zone of the Bangor Limestone Formation in northern Alabama TIME PERIOD: Mississippian Period (ca 325,000,000 yrs old) Data: Crinoids are marine animals that make up the class Crinoidea of the echinoderms. The name comes from the Greek word krinon, "a lily", and eidos, "form". They live in both shallow water and in depths as great as 9,000 meters. Kingdom: Animalia Phylum: Echinodermata Class: Cridoidea Order: †Cladida Family: †Synerocrinidae Genus: †Phanocrinus Species: †formosus -
From the album: MY FOSSIL Collection - Dpaul7
Crinoids - Pentaramicrinus nitidus Chesterian Zone of the Bangor Limestone Formation in northern Alabama Mississippian Period (ca 325,000,000 years old) Here is a matrix with a Pentaramacrinus nitidus, a Crinoid of the Mississippian Period. Crinoids are marine animals that make up the class Crinoidea of the echinoderms (phylum Echinodermata). The name comes from the Greek word krinon, "a lily", and eidos, "form". They live in both shallow water and in depths as great as 9,000 meters (30,000 ft). Those crinoids which in their adult form are attached to the sea bottom by a stalk are commonly called sea lilies. The unstalked forms are called feather stars or comatulids. Crinoids are characterised by a mouth on the top surface that is surrounded by feeding arms. They have a U-shaped gut, and their anus is located next to the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, most crinoids have many more than five arms. Crinoids usually have a stem used to attach themselves to a substrate, but many live attached only as juveniles and become free-swimming as adults. There are only about 600 extant crinoid species, but they were much more abundant and diverse in the past. Some thick limestone beds dating to the mid- to late-Paleozoic are almost entirely made up of disarticulated crinoid fragments. Kingdom: Animalia Phylum: Echinodermata Class: Cridoidea Order: †Cladida Family: †Pentaramicrinidae Genus: †Pentaramacrinus Species: †nitidus
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