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Showing results for tags 'platyceras'.
Found 9 results
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Does anyone know what species of Platyceras have been found in the Cedar Valley Formation/Devonian of Iowa??
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Hoooooooooooorrrrrrrrrrrraaaaaaayyyyyyyyyyy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Here we are at last, into Adam's Silurian. Thanks for looking. First up is the Lower Silurian or Llandovery and I begin with a problem. I posted this one incorrectly in Adam's Ordovician as it had got it's label muddled up with an Ordovician Favosites I had that has vanished in the move here, but is being replaced by kind forum member @Herb Anyway, this, I remember now I've found the correct label, is from the greenish Browgill Formation, part of the Stockdale Group from a cutting near Skelgill (Skelghyll) in Cumbria, Northern England. It seems to be a tabulate coral, but I can't find any listed for this location, only mentions of small, rare, rugose corals. It has the star shaped corallites of a Heliolitidid, but seems to be tightly packed together like a Favositidid. A couple of species of Palaeofavosites seem to be close and are a bit star-shaped,, but anyone know any better? @TqB@piranha hmm who else? The coral bit, an external mold, is a maximum of 3.5 cm across and each corallite up to 2 mm.
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- leptostophiidae
- eostrophodonta mullochensis
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Sitting on a Dolatocrinus crown.
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4 specimens on a hash plate together with crinoid and brachiopod debris.
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Thought it would be nice to post an oldie(1922)** yakowecolinteractgastropcrinoidZoolAnzc1922_0291-0294.pdf The author "leans towards" Simroth's theory that commensalism (and/ or mutualism)evolved from "parabiosis*",because the gastropod can sometimes be found attached to the crinoid stele . *apparently:the simple phenomenon of attachment,without connotations about causes or substrate preference . The frequent (obligatory,almost?)co-occurence of the fossils is explained by the life-long interaction itself: when the crinoid dies,the gastropod dies. (probable naticid gastropod boreholes can be found on some "infested" crinoids) The attachment scar of the gastropod are concentric,the gastropod aperture has an excentric location,to keep the aperture covering the anal aperture of the crinoid. The erosion/(resorption?) of the anal proboscis may be due to the gastopod Small circular depressions are tentativel attributed to early ontogenetic failed predation attempts by juvenile gastropod **and I am aware of the more recent literature on this subject havent read yet
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Platyceras (Spiniplatyceras) arkonense (Shimer Grabau 1902)
Ludwigia posted a gallery image in Members Gallery
From the album Gastropods and Bivalves Worldwide
3x On a hash plate from the north pit at Hungry Hollow, Ontario along with brachiopod and crinoid debris. Arkona Shale Formation, Givetian, Middle Devon.- 6 comments
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- platyceras
- arkona
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Hi, I am looking for someone that can do a good (preferably great) job prepping out a fossil for me. I have a Platyceras that died still sucking the crinoids' backside. I don't have means or equipment to do a proper prep. If you do good work or know someone that does, I'd appreciate the contact. Unfortunately, I am somewhat cash poor but would like to perhaps work out some sort of trade for the work done. I have quite a few fossils or mineral specimens I could trade for the time. Thanks, caldigger
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More Lower Devonian Gastropods From The Glenerie Limestone, Kingston, Ny
Jeffrey P posted a topic in Member Collections
Platyceras "spirale", a Lower Devonian gastropod from the Glenerie Limestone exposed in a roadcut along Route 9W between Kingston and Saugerties, NY. These three preserved in silica are the only examples I have.- 2 replies
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- Gastropods
- Lower Devonian
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I went to the North Pit of Hungry Hollow for a few hours on Friday. I spent most of my time digging through the clay piles and walking around the water's edge, scoping out a few recognizable shapes that are by now completely camouflaged by the clay. It's amazing that my eyes even zeroed in on my tiny trilobites but I guess they had waited long enough for me to take them home, and today was the day! One trilobite turned out to be just the head but the other is pretty cute. I met one hiker from Pennsylvania (Greg) that came through the trail along the North side of the river. I introduced myself and we chatted for a few minutes. i always enjoy meeting tourists from different parts of the country. As I headed out, I decided to try the north cliff near the parking area and there I found a very nice Heteroschisma alatum (blastoid). It is about 1/4" wide and 3/8" long. In my pill bottle it went! I hope the photo is clear enough to see the detail. I got called back home or I would have stayed there a few more hours, even though the sun was beating down on me. Even one good find keeps me there longer than I anticipated! Incidentally, I went home with a large bag of garbage that I collected in the pit. I try to take anything out (cans, bottles, plastic bags etc) that I can, each time I go there and it always surprises me that I find more the next time I go. I hope people will be mindful that it's a privilege for us to be able to dig there at the generosity of the land owners. Please take your litter home with you. Detail is a bit clearer in the image above. I took the time to dig a few footholds so I wouldn't take a spill down the hill!
