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Showing results for tags 'ordovician'.
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Stylophorans are Echinoderm? (Fezouata Lagerstätte, Morocco)
Oxytropidoceras posted a topic in Fossil News
Lefebvre, B., Guensburg, T.E., Martin, E.L., Mooi, R., Nardin, E., Nohejlova, M., Saleh, F., Kouraïss, K., El Hariri, K. and David, B., 2018. Exceptionally preserved soft parts in fossils from the Lower Ordovician of Morocco clarify stylophoran affinities within basal deuterostomes. Geobios. https://www.researchgate.net/publication/329204055_Exceptionally_preserved_soft_parts_in_fossils_from_the_Lower_Ordovician_of_Morocco_clarify_stylophoran_affinities_within_basal_deuterostomes https://www.researchgate.net/profile/Bertrand_Lefebvre2 Other PDF files of papers are: Fatka, O., Nohejlová, M. and Lefebvre, B., 2018. Lapillocystites BARRANDE is the edrioasteroid Stromatocystites POMPECKJ (Cambrian, Echinodermata). Neues Jahrbuch für Geologie und Paläontologie-Abhandlungen, 289(2), pp.139-148. https://www.researchgate.net/publication/326558585_Lapillocystites_BARRANDE_is_the_edrioasteroid_Stromatocystites_Pompeckj_Cambrian_Echinodermata https://www.researchgate.net/profile/Bertrand_Lefebvre2 Makhlouf, Y., Nedjari, A., Dahoumane, A., Nardin, E., Nohejlová, M. and Lefebvre, B., 2018, November. Palaeobiogeographic implications of the first report of the eocrinoid genus Ascocystites Barrande (Echinodermata, Blastozoa) in the Upper Ordovician of the Ougarta Range (Western Algeria). In Annales de Paléontologie. Elsevier Masson. https://www.researchgate.net/publication/329138078_Palaeobiogeographic_implications_of_the_first_report_of_the_eocrinoid_genus_Ascocystites_Barrande_Echinodermata_Blastozoa_in_the_Upper_Ordovician_of_the_Ougarta_Range_Western_Algeria https://www.researchgate.net/profile/Bertrand_Lefebvre2 Yours, Paul H.- 1 reply
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- deuterostomes
- echinoderms
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I have looked at this piece for about 1 week and my opinion changes from a crinoid stem and calyx to a crinoid stem and broken gastropod and back. So I will now defer to anyone visiting this post to leave their opinion seeing I can't make up my mind. I have both specimens marked.
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I fish alot on the Whitewater River here in Franklin County Indiana and look for fossils and rocks. I posted this photo under the rocks and minerals section and a member said that it could contain a mash up of small fossils. I just thought it looked like a rock that had odd patterns like little hieroglyphics, could they be tiny fossils? Linda
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Question about the division between time periods. Ordovician vs. Silurian
Recker posted a topic in Questions & Answers
I have a question about the different time periods, I live in Southeast Indiana, Whitewater river area, within the Cincinnati region and Ordovician period. Having a hard time understanding this, will I only find Ordovician period fossils or could I find later period fossils like Silurian fossils? And why? You all have been so helpful and I appreciate it. Linda -
Getting My Feet Wet In the Ordovician of Wisconsin and Iowa
RCFossils posted a topic in General Fossil Discussion
2018 was the year that I finally took some time to explore Ordovician aged sites in Southwestern Wisconsin and Eastern Iowa. Inspired by past forum posts (special shoutout to Caleb Scheer who was unfortunately taken from this world way to young) along with an invite from a fellow Fossil Forum member, I was able to make several trips into the fossil rich Platteville and Maquoketa formations. I was mainly focused on finding some of the amazing trilobites that these formations are known for. I also collected some nice representative examples of the various other fauna. Most of my experience collecting Ordovician fossils has been in the Cincinnatian of Indiana, Ohio and Kentucky. For those not familiar with collecting in the Cincinnatian, the vast majority of trilobites that you will find are Flexicalymene meeki along with lots of bits and pieces of Isotelus. One of the things that struck me right away in the Platteville and Maquoketa was the quantity and diversity of trilobite types that are readily found. While almost all of the trilobites will be fragments, occasionally you get lucky and find something complete. There is definitely a learning curve sorting through the various trilo-bits and learning to recognize the various species. Forum member Piranha was always willing to help out with identifications. My first trip out was in late Winter. I spent a day with forum member Fossilized collecting a few roadcuts in both Wisconsin and Iowa. The first relatively complete trilobite that I came across that day was also possibly my rarest find of the year. It is a very rare Cheirud: Acanthoparypha sp. Unfortunately the cephalon was gone but still an impressive specimen.
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- ordovician
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I only recently got into collecting after being out hiking and literally tripping over a large coral fossil a couple years ago and the hunt has been on since! SO much to learn! I wish I'd have started 30 or 40 years ago. I haven't posted any of my finds as I've been trying learn a little first and see if I could identify some of these. I think I've got some of them and others I haven't found a name for, so I hope you don't mind me dumping several on you. Are all these Receptaculites Oweni? They were found in the Galena dolomite in the Dubuque area in what I think is the Fairplay member of the Dunleith. (30 or 40 feet above river level) The third photo of the slightly smaller one was found in a drainage ravine so I can't be sure the layer it came from, but I don't believe it had been carried very far if at all. It was 30 or 40 feet higher than the other two. Is the last one Ischadites Iowensis or another Oweni? Is there a good guide to these somewhere? These next are of a nautiloid I haven't found the name for. This was found in the Guttenburg member of the Decorah also in the Dubuque area near river level. It was in the outcrop about a foot above the top of what I think is the Spechts Ferry member. I also found quite a few Rafinesquina brachiopods laying around in the talus and the pygidiums of a couple different trilobite. I think one is Gabricerarus Mifflenensis and the other Isotelus? It looks a lot like the ones in the last photos of what I'm pretty sure are some Isotelus Iowensis I found near Elgin, IA). Are these Isotelus Iowensis? These were found near Elgin, IA in what I think is the Elgin member of the Maquoketa. About a foot above the Turkey river that day. You can actually make out what I assume are compound eyes? Being kind of new to this I'm amazed at the detail you can still see in some of these for something so old. I haven't found the name of these cephalopods yet either. They were found the same day and not far from the trilobites in Elgin and about 5 or 6 feet higher in the rock layer.
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Found associated with T. rougensis, T. spinosus, brachiopods, cephalopods, and graptolites. Included in multi plate alongside eight other complete or near complete T. eatoni.
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Included in multi plate alongside eight other complete or near complete T. eatoni. Found in association with T. rougensis, T. spinosus, Brachiopods, Cephalopods, and Graptolites. The Cephalon is slightly disarticulated, likely from molting.
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- billings formation
- billings shale
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Both genal spines are present. Right side of cephalon is slightly pyritized. Found associated with T. spinosus, T. eatoni, cephalopods, and graptolites.
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- billings formation
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From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Selenopeltis sp, a very rare trilobite found in the ordovician of La Dominelais during autumn 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Salterocoryphe salteri salteri, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Prep project 1 Neseuretus tristani, a trilobite as it was discovered in the ordovician of La Dominelais during autumn 2018. Circled one of the cheek poping out the nodule. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Prep project 1 Neseuretus tristani, a trilobite as it was discovered in the ordovician of La Dominelais during autumn 2018. Circled the pygidium poping out the nodule -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Rolled up Neseuretus tristani - view 2, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Rolled up Neseuretus tristani - view 1, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
Neseuretus tristani lying on a belerophon gastropod
elcoincoin posted a gallery image in Member Collections
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani lying on a belerophon gastropod, a trilobite found in the ordovician of La Noe Blanche during summer 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani, a trilobite found in the ordovician of La Noe Blanche during summer 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani, a trilobite found in the ordovician of La Noe Blanche during summer 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani, a trilobite found in the ordovician of La Noe Blanche during autumn 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Association detail : Ectillaenus giganteus, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Association detail : Eodalmanitina Sp, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
Association of Ectillaenus giganteus and Eodalmanitina Sp
elcoincoin posted a gallery image in Member Collections
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Association of Ectillaenus giganteus and Eodalmanitina Sp., 2 trilobites found in the ordovician of La Dominelais during autumn 2018.
