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Showing results for tags 'ordovician'.
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Help request! I am putting together a tool for judging rock age based on very crude, whole-rock, hand-sample observations of fossil faunas/floras -- the types of observations a child or beginner could successfully make. I view this as a complement to the very fine, species-level identifications commonly employed as index fossils for individual stages, biozones, etc. Attached is what I've got so far, but I can clearly use help with corals, mollusks, plants, vertebrates, ichnofossils, and the post-Paleozoic In the attached file, vibrant orange indicates times in earth history to commonly observe the item of interest; paler orange indicates times in earth history to less commonly observe the item of interest. White indicates very little to no practical probability of observing the item of interest. Please keep in mind that the listed indicators are things like “conspicuous horn corals,” purposefully declining to address rare encounters with groups of low preservation potential, low recognizability, etc. Got additions/amendments, especially for the groups mentioned above? Toss them in the comments below! Thank you..... https://docs.google.com/spreadsheets/d/1tVm_u6v573V4NACrdebb_1OsBEAz60dS1m4pCTckgyA- 5 replies
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EDIT (Updated August 19): Current 2020 Running Tally of Ontario Bugs. New species for this year in bold Acanthopyge contusa Anchiopsis anchiops Bathyurus (Raymondites) longispinus Bufoceraurus bispinosus Bumastoides milleri Burtonops cristata Calymene platys Calyptaulax callicephalus Ceraurinella trentonensis (?) Ceraurinus marginatus Ceraurus sp. Coronura aspectans Crassiproetus crassimarginatus Crassiproetus canadensis Dolichoharpes dentoni Echinolichas sp. cf. eriopis Echinolichas sp. cf. hispidus Ectenaspis homalonotoides Eldredgeops iowensis southworthi Eldredgeops rana Eomonarachus intermedius Failleana indeterminata Flexicalymene croneisi Flexicalymene granulosa Flexicalymene senaria Gabriceraurus dentatus Greenops widderensis Isotelus "mafritzae" Isotelus maximus Mannopyge halli Mystrocephala stummi Odontocephalus n. sp. Physemataspis pernododusus (?) Pseudodechenella sp. Pseudogygites latimarginatus Sceptaspis lincolnensis Terataspis grandis Thaleops sp. Trypaulites calpyso Trypaulites erinus Total: 40 New: 17 I'll be parking all my trilobite hunts for the year in this thread. With winter ending much sooner than we are accustomed to up here, it's about time to get back into the hammer-swing of things. This year is an ambitious one, no less on account of having spent some quality time with old literature, maps (new and old), to plot out a series of areas to prospect all across the province. A significant amount of fieldwork is planned as part of a broader research project. This past weekend was the season opener for me, with temperatures hitting about 4 Celsius on Saturday, and near 12 Celsius on the Sunday. By now, almost all the snow has burned off, with just a few shadier spots remaining. This is the view as I set out through the bush around sunrise. The ground was still frozen, which was fine as it made trekking over mud much easier.
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Hi everyone, These were found in Bowmanville, ON, Canada, on the coast near Port Darlington. I would appreciate any help identifying these.
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Some nice pyritized specimens acquired in Tucson. Caryosyntrips like frontal appendage. (2cm) Another raptor claw from unknown arthropod (1cm) Classic Beecher's Trilobite Bed mortality plate
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- ordovician
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Ordovician Maquoketa Shale SE Minnesota I believe I see a Flexicalymene sp. trilobite and a whole lot more pieces of trilobites. Hence I'm including Caleb's trilo ID rock for reference. I thought if I could get a confirmation or two I would post this hunt as it was a beautiful day in early March to fossil hunt. :-) Well, I guess this will be multiple replies as I don't want to reduce the images where you can't see all the parts. :-)
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New light shed on ancient NZ fossils Ancient marine creatures once believed to have been mere ‘bit players’ in the fossil record have now found fame. Victoria University Of Wellington https://www.newsroom.co.nz/ideasroom/2020/03/05/1067165/new-light-shed-on-ancient-nz-fossils The paper is: Crampton, J.S., Cooper, R.A., Foote, M. and Sadler, P.M., 2020 Ephemeral species in the fossil record? Synchronous coupling of macroevolutionary dynamics in mid-Paleozoic zooplankton. Paleobiology, vol 46, no. 1, pp.1-13. https://www.cambridge.org/core/journals/paleobiology/article/ephemeral-species-in-the-fossil-recordsynchronous-coupling-of-macroevolutionary-dynamics-in-midpaleozoic-zooplankton/F87F8986D7197004222B4E3F5170B748 Yours, Paul H.
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- graptolites
- macroevolution
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Interesting gravel pit find in Monticello, Maine (Aroostook county, slightly north of Houlton - NE Maine). This specific area is identified as “Ordoclavian-Silurian marine sandstone and slate“ on the FEMA Simplified Bedrock Geologic Map Of Maine, and the north branch of the Meduxnekeag River passes through this small town. I’d be very appreciative for ANY information anyone can glean about this find from the photos and information I’ve provided. Thanks always for your time and consideration. ~caroline
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Moroccan Trilobite Selenopeltis: Is it real?
Praefectus posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hello. I saw this trilobite piece on display and was wondering if anyone could tell me more about it. I believe it is fake or heavily composited. Do the trilobites shown come from the same time period? Also, would trilobites and starfish be found together like this? The owner thinks the trilobites are real but have been composited together. Is there any way to verify this? Thanks for any help.
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Hello, everyone, I’m newly retired after 39 years of teaching. Over the years, I have collected, by purchase, to use as demonstration pieces in the classroom a wide collection ranging from Archean microbial mat cross-sections through time to Holocene cave bear vertebrae. My collection is very diverse through time, if limited in depth. I have a nice collection of Silurian-Devonian trilobites, some nice Devonian-Permian plant material, and a range of Holocene mammal bones; vertebrae and mandibles. ... I taught a variety of upper level secondary courses over the years. As Science Dept. Chair in an independent school, I oversaw curriculum (shorthand for “I got to teach what I loved) For many years I taught an Natural History course to seniors looking at the evolution of the Universe. First term Cosmology-Planetary Science; Second term Evolution of Life. A dream job. Now, I’m trying to complete a more formal indexing of my collection (which includes MANY casts as well). Nice to find you folks. Probably will be an infrequent visitor. Glenn
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Taxonomy from Fossilworks.org. Reconstruction from Jefferies 1984, p.293: References: Richard P. S. Jefferies (1984) Locomotion, shape, ornament, and external ontogeny in some mitrate calcichordates, Journal of Vertebrate Paleontology, 4:3, 292-319, DOI: 10.1080/02724634.1984.10012011
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Came across this small fossil (4mm). It appears to be a ventral genal spine, but I could be wrong. Upper Ordovician. Any idea what species?
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I found this chunk of shale poking around a bluff side a while back near Lilydale Park in Minneapolis, MN. The fragment pictured is translucent and is slightly concave, it reminds me of a cheek plate but Im not sure. I'm new at this so I'm pretty clueless, I appreciate any help.
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I was going through some rocks I found last year and came across this tiny cephalon I never noticed before. I believe this is Ft Atkinson formation , Ordovician. Cephalon measures only 1mm and is covered in tubercles. I'm wondering because of size would this be considered protaspid? Any help with ID appreciated.
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Luolishaniid or Diania-like lobopodian from Fezouata Shale
YXWYX posted a topic in Member Collections
Here presents probably the first complete lobopodian fossil from Fezouata Formation, it is under describing at the moment. Outline looks very similar to Luolishania + Diania from Chengjiang Biota. Truly amazing creature.
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Please refer https://burgess-shale.rom.on.ca/en/fossil-gallery/view-species.php?id=123&m=2&&ref=i for its comparison.
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A laterally preserved Brachyaglaspis singularis.
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Acquired one in 2018, which I believe it should be a Calvapilosa kroegeri, or the 'armored worm'. Any ideas on this ID? Related link: https://www.theguardian.com/science/2017/feb/06/newly-discovered-slug-looks-like-a-hairy-toe-and-could-reveal-the-ancestry-of-molluscs-calvapiloa-kroegeri
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A type of Paleoscolecid worm, not described yet. Related link: https://www.researchgate.net/publication/299613058_Palaeoscolecid_worms_from_the_Lower_Ordovician_Fezouata_Lagerstatte_Morocco_Palaeoecological_and_palaeogeographical_implications
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Thelxiope like creature from Fezouata Shale, described by Peter Van Roy 2013. It looks very similar to the Burgess one: Thelxiope palaeothalassia LINK: https://burgess-shale.rom.on.ca/en/fossil-gallery/view-species.php?id=123
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My collection of Enosiaspis hrungnir so far: Animalia; Arthropoda; Trilobitomorpha; Trilobitoidea; Marrellomorpha; Acercostraca; Vachonisiidae Determined by: David A. Legg, 2016
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Here presents three rare arthropods acquired from Fezouata Shale: Brachyaglaspis singularis gen. et sp. nov., which is described in 2015 for the first time. The paper is: 'A new aglaspidid euarthropod with a six-segmented trunk from the Lower Ordovician Fezouata Konservat-Lagerstätte, Morocco'. The first shows pretty nice outline of this aglaspidid, the third one is quite crappy...Fourth picture is the reconstruction of this type.
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Here presents two Leanchoilia sp. from Morocco: Left one is dorsal view and the second one is later view. It shares almost the same features as the common type.
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Hi everyone, just new for this fossil forum. Hope I could enhance the diversity of fossil species. So what we have here below are: left: the Chengjiang Biota Circocosmia jinningensis Hou & Sun, 1988 right up: Paleoscolecid from Fezouata Shale right down: Paleoscolecid from Guole Biota
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These are pretty rough fossils. I haven't found a decent specimen yet, but ive ran into a few of them the last few months. Most likely gasconade formation (earliest bed of Missouri Ordovician ) cephalopods are a guess but I'd like your opinion. Are they known in 480 million year old tropical seabeds? Im not familiar with the details. Give me the run down on these fellas.
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I recently acquired an Ordovician rock from an antique shop near my house. It is a dark shale with cryptolithus and what I think are isotelus trilobites on it as well as brachiopods and graptolites. I am unsure which formation or even where it is from but it has this strangely shaped creature that I have not been able to identify. The creature has tiny indents all over its surface.
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