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Jack Kallmeyer replied to the topic TX Echinoid ID? in the forum What Is It? 3 years, 7 months ago
3 years, 7 months ago3 years, 7 months ago@theodore-gray Frankly, they all look alike to me. However, I suggest you obtain a copy of Collector’s Guide to Texas Cretaceous Echinoids by William W Morgan, Schiffer publishing, 2016. He’s got all of them covered.
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Jack Kallmeyer posted a new activity comment 3 years, 9 months ago
3 years, 9 months ago3 years, 9 months ago@david-coxiii, @samantha-ocon I know of a mineral collector who did some lapidary work and had used a wet diamond saw. He breathed the water spray that comes off the saw over many years. This spray contains fine rock dust. He now has a serious lung disease.
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Jack Kallmeyer replied to the topic Trilobite Prep in the forum Fossil Prep Tips & Tricks Forum 3 years, 9 months ago
3 years, 9 months ago3 years, 9 months ago@samantha-ocon , @sadie-mills I have an answer for you. I got the following information from one of the prep lab people who actually use these tools:
The normal tool we use is Chicago Pneumatic scribe which comes in any number of sizes depending on what you want to use it for. Paleo Tools has a wide selection of the Chicago and also se…[Read more]
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Jack Kallmeyer replied to the topic Trilobite Prep in the forum Fossil Prep Tips & Tricks Forum 3 years, 9 months ago
3 years, 9 months ago3 years, 9 months ago@samantha-ocon I could check to see what they use in the Cincinnati Museum prep labs. Maybe that will help. I am laid up with a foot injury so I’ll have to get one of my friends to check.
Jack
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Jack Kallmeyer replied to the topic Trilobite Prep in the forum Fossil Prep Tips & Tricks Forum 3 years, 9 months ago
3 years, 9 months ago3 years, 9 months ago@samantha-ocon I am sorry I can’t offer any help along those lines. I don’t use this type of equipment as it isn’t generally needed for most fossils around here. “hard core” people who do lots of this type of work are the ones who use these. If you do get one of these remember that you still need a strong suction device pulling away the mat…[Read more]
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Don’t ignore his advice on the dust. Safety glasses as well. Cheap air scribes are available, but the metal used in the tip may not have the best metallurgy.
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@david-coxiii, @samantha-ocon I know of a mineral collector who did some lapidary work and had used a wet diamond saw. He breathed the water spray that comes off the saw over many years. This spray contains fine rock dust. He now has a serious lung disease.
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Jack Kallmeyer posted a new activity comment 4 years, 1 month ago
4 years, 1 month ago4 years, 1 month ago@sadie-mills Sorry, not from this photo. Needs a closer sharp photo but it looks to be only the thorax from this photo which would make it impossible to ID.
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Jack Kallmeyer replied to the topic Trilobite Prep in the forum Fossil Prep Tips & Tricks Forum 4 years, 2 months ago
4 years, 2 months ago4 years, 2 months ago@sadie-mills@carl-lewis A lot depends on the preservation material for the trilobite. Most will be calcitic and will be adversely affected by any chemical cleaner that will dissolve limestone. To remove loose or soft shale or mud a toothbrush with water and an optional mild detergent will help. If the limestone matrix is covering part of t…[Read more]
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Jack Kallmeyer joined the group
University of Michigan Museum of Paleontology 4 years, 3 months ago
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Jack Kallmeyer posted a new specimen. 4 years, 3 months ago
4 years, 3 months ago4 years, 3 months agoJack Kallmeyer has contributed specimen mFeM 58692 to myFOSSIL!
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Jack Kallmeyer posted a new activity comment 4 years, 3 months ago
4 years, 3 months ago4 years, 3 months ago@nathan-newell Have you read “Nautilus, Beautiful Survivor, 500 million years of evolutionary history” by Wolfgang Grulke? It has lots of beautiful color photos and great information. Grulke’s previous book, “Heteromorph” was about the really odd ammonites. You’ll like that too.
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@jkallmeyer I haven’t read either of those, but I’ll be sure to put them on my to-read list! Thanks!
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Jack Kallmeyer posted a new activity comment 4 years, 3 months ago
4 years, 3 months ago4 years, 3 months agoOsgood doesn’t necessarily name them to specific trace maker but the names vary based upon their morphology. I think there are at least three versions all possibly attributed to Isotelus. The terms Osgood uses at least have an ichnospecies name while I am not aware of the same with Diplichnites.
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Jack Kallmeyer posted a new activity comment 4 years, 3 months ago
4 years, 3 months ago4 years, 3 months agoI go by Osgood’s work wherein he discusses Cincinnatian arthropod trackways under different genera stating, “there is considerable doubt as to the true affinities of the commonly mentioned genera of supposed trilobite tracks… Diplichnites” (p352, 355). So each of the trackways I have submitted would have different ichnogenera and none would be…[Read more]
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I don’t have access to Osgood’s book at this moment. I was taught that it’s bad form to name the track after the tracemaker because many different animals can make similar tracks.
If you want to follow Osgood, that is fine just include the year of the publication in the notes so someone else can follow in your steps. As you currently have it,…[Read more]
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Jack Kallmeyer posted a new activity comment 4 years, 3 months ago
4 years, 3 months ago4 years, 3 months agoThat sounds right although I did not include the actual trace fossil taxonomy which I probably do not know. I included the taxonomy of the possible trace maker. Poor form… but my original purpose wasn’t to do a proper museum label but rather to show people what a trace fossil from a given critter looked like.
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That’s why I’m around, to help with figuring out the correct information! I would think this would be Diplichnites (generic assignment) – very common for arthropod trackways.
https://en.wikipedia.org/wiki/Diplichnites
https://www.trilobites.info/trace.htm
http://ichnology.ku.edu/invertebrate_traces/tfimages/diplichnites.htmlHope this is…[Read more]
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I go by Osgood’s work wherein he discusses Cincinnatian arthropod trackways under different genera stating, “there is considerable doubt as to the true affinities of the commonly mentioned genera of supposed trilobite tracks… Diplichnites” (p352, 355). So each of the trackways I have submitted would have different ichnogenera and none would be…[Read more]
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I don’t have access to Osgood’s book at this moment. I was taught that it’s bad form to name the track after the tracemaker because many different animals can make similar tracks.
If you want to follow Osgood, that is fine just include the year of the publication in the notes so someone else can follow in your steps. As you currently have it,…[Read more]
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Jack Kallmeyer posted a new activity comment 4 years, 3 months ago
4 years, 3 months ago4 years, 3 months agoPerhaps pseudofossil isn’t a good choice. It is a pseudo trace fossil. Since trace fossils are those made by an animal doing something and this trace is made by water currents acting on a piece of crinoid stem I don’t think it can be called a trace fossil. Is that correct? This is not mistaken for a crinoid but might be mistaken for a real…[Read more]
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Jack Kallmeyer posted a new activity comment 4 years, 3 months ago
4 years, 3 months ago4 years, 3 months agoUnable to upload image with scale sending via email
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Jack Kallmeyer posted a new activity comment 4 years, 3 months ago
4 years, 3 months ago4 years, 3 months agoI created a new image with scale bar and size but once again could not upload the image!!!! I sent the replacement image to you by email. I also sent feedback again.
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Jack Kallmeyer posted a new activity comment 4 years, 3 months ago
4 years, 3 months ago4 years, 3 months agoJen,
I could fudge one in based on the dimensions listed here. This was the first specimen I cut from this locality for Carl Brett at UC. He has the specimen. Do you still need a scale bar?
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Jack Kallmeyer posted a new activity comment 4 years, 3 months ago
4 years, 3 months ago4 years, 3 months agoI took Richmondian out of the group. I have no idea what Group means in the Cincinnatian. Also updated taxonomy.
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Jack Kallmeyer posted a new activity comment 4 years, 3 months ago
4 years, 3 months ago4 years, 3 months agoThis one is 25 mm
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Jack Kallmeyer posted a new activity comment 4 years, 4 months ago
4 years, 4 months ago4 years, 4 months ago@jbauer Jen, Jen, Jen, it is 10 mm as indicated below the bar 🙂 Hardly visible in the thumbnail but OK when you enlarge the photo. Got you on this one… BTW, I no longer have this specimen. Traded it for something or other.
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