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Showing results for tags 'monoplacophoran'.
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Hi I came across this while hunting for trilobites at a commercial Cambrian shale quarry in Utah near Delta and was wondering if it was a monoplacophoran or something else or just an odd rock formation. The shape is concave and about 2 inches in diameter. Any help would be much appreciated. Thank you!
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- cambrian
- monoplacophoran
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- lower ordovician
- missouri
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Hello there! Since the kids are in day camps this week, and my husband was going to see a movie with his friend this afternoon, I took advantage of the available me-time and went for a little fossil hunt at Etobicoke Creek in Mississauga, Ontario (Georgian Bay Formation, Upper Ordovician). I have some ideas about what I've found, but I'd like your opinions, too: Specimen #1: trilobite resting place (Rusophycus, probably made by a Flexicalymene) Specimen #2: I think this is the monoplacophoran Cyrtolites ornatus - it was very flaky and some pieces fell off, but I tried to glue together the larger pieces Specimen #3: brachiopod positive and negative, but the question is which brachiopod? Thanks in advance for your help! Monica
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- 1
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- brachiopod
- etobicoke creek
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From the album: Carboniferous Fossils from Lawrence County, Missouri
Burlington-Keokuk Formation Osagean Series, Lower Viséan (presumed) Lawrence County near Greene County border, Missouri, USA -
From the album: Carboniferous Fossils from Lawrence County, Missouri
Burlington-Keokuk Formation Osagean Series, Lower Viséan (presumed) Lawrence County near Greene County border, Missouri, USA -
From the album: Carboniferous Fossils from Lawrence County, Missouri
Burlington-Keokuk Formation Osagean Series, Lower Viséan (presumed) Lawrence County near Greene County border, Missouri, USA -
From the album: Carboniferous Fossils from Lawrence County, Missouri
Burlington-Keokuk Formation Osagean Series, Lower Viséan (presumed) Lawrence County near Greene County border, Missouri, USA -
From the album: Carboniferous Fossils from Lawrence County, Missouri
Burlington-Keokuk Formation Osagean Series, Lower Viséan (presumed) Lawrence County near Greene County border, Missouri, USA -
From the album: Carboniferous Fossils from Lawrence County, Missouri
Burlington-Keokuk Formation Osagean Series, Lower Viséan (presumed) Lawrence County near Greene County border, Missouri, USA -
From the album: Carboniferous Fossils from Lawrence County, Missouri
Burlington-Keokuk Formation Osagean Series, Lower Viséan (presumed) Lawrence County near Greene County border, Missouri, USA -
From the album: Carboniferous Fossils from Lawrence County, Missouri
Burlington-Keokuk Formation Osagean Series, Lower Viséan (presumed) Lawrence County near Greene County border, Missouri, USA -
From the album: Carboniferous Fossils from Lawrence County, Missouri
Burlington-Keokuk Formation Osagean Series, Lower Viséan (presumed) Lawrence County near Greene County border, Missouri, USA -
I'm having difficulty identifying this specimen. I found it in Osagean, probably Visean limestone in Lawrence County, Missouri, associated with various other monoplacophorans, which I believe to be kirengellids or something similar. The last picture is an example of an associated fossil of a similar size, being about 3.2cm from foot to apex. I also found in the same piece of stone a smaller, more rounded specimen, as well as fragments of a third. Stinchcomb and Angeli describe two species that share some characteristics with the fossil in question[1]. Kirengella oregonensis, which is found in cherts from the Roubidoux Formation (Lower Ordovician) in Oregon County, Missouri, is described as "strongly laterally compressed" with "aperture oval" (p. 971). And a new species, Wildernessia inexpecatans, from the same area, is described as having "apical curvature; aperture sub-elliptical forming cone; apex centrally located" (p. 973). Neither of these, of course, is what I have, since I am pretty certain my object came from a nearby quarry and is therefore Visean. But could it be another, later type of Kirengellid? 1. Stinchcomb, B. L., & Angeli, N. A.. (2002). New Cambrian and Lower Ordovician Monoplacophorans from the Ozark Uplift, Missouri. Journal of Paleontology, 76(6), 965–974. Retrieved from http://www.jstor.org/stable/1307116
- 6 replies
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- carboniferous
- kirengella
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