• Jack Kallmeyer replied to the topic TX Echinoid ID? in the forum What Is It? 3 months, 2 weeks ago

    3 months, 2 weeks ago
    3 months, 2 weeks 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.

  • Jack Kallmeyer posted a new activity comment 6 months, 1 week ago

    6 months, 1 week ago
    6 months, 1 week 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.

  • Jack Kallmeyer replied to the topic Trilobite Prep in the forum Fossil Prep Tips & Tricks Forum 6 months, 1 week ago

    6 months, 1 week ago
    6 months, 1 week 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]

  • Jack Kallmeyer replied to the topic Trilobite Prep in the forum Fossil Prep Tips & Tricks Forum 6 months, 1 week ago

    6 months, 1 week ago
    6 months, 1 week 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

  • Jack Kallmeyer replied to the topic Trilobite Prep in the forum Fossil Prep Tips & Tricks Forum 6 months, 1 week ago

    6 months, 1 week ago
    6 months, 1 week 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]

    • 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.

  • Jack Kallmeyer posted a new activity comment 10 months, 1 week ago

    10 months, 1 week ago
    10 months, 1 week 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.

  • Jack Kallmeyer replied to the topic Trilobite Prep in the forum Fossil Prep Tips & Tricks Forum 11 months ago

    11 months ago
    11 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]

  • 11 months, 3 weeks ago
  • Jack Kallmeyer posted a new specimen. 1 year ago

    1 year ago
    1 year ago

    Jack Kallmeyer has contributed specimen mFeM 58692 to myFOSSIL!

  • Jack Kallmeyer posted a new activity comment 1 year ago

    1 year ago
    1 year 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.

  • Jack Kallmeyer posted a new activity comment 1 year ago

    1 year ago
    1 year ago

    Osgood 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.

    • There are many species of Diplichnites, let me know what Osgood refers to the species as when you get a chance to reference the volume.

  • Jack Kallmeyer posted a new activity comment 1 year ago

    1 year ago
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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]

    • 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]

  • Jack Kallmeyer posted a new activity comment 1 year ago

    1 year ago
    1 year ago

    That 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.

  • Jack Kallmeyer posted a new activity comment 1 year ago

    1 year ago
    1 year ago

    Perhaps 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]

    • Okay, that makes more sense to me! You are correct, a trace fossil indicates animal behavior and this is nature acting on the (dead?) animal parts.

  • Jack Kallmeyer posted a new activity comment 1 year ago

    1 year ago
    1 year ago

    Unable to upload image with scale sending via email

  • Jack Kallmeyer posted a new activity comment 1 year ago

    1 year ago
    1 year ago

    I 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.

    • I got it updated & sent a reply email – we will figure it out eventually or Max will get the additional option up!

  • Jack Kallmeyer posted a new activity comment 1 year ago

    1 year ago
    1 year ago

    Jen,

    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?

    • If the specimen is no longer under your care it is *less vital* to get the scale bar added.

  • Jack Kallmeyer posted a new activity comment 1 year ago

    1 year ago
    1 year ago

    I took Richmondian out of the group. I have no idea what Group means in the Cincinnatian. Also updated taxonomy.

  • Jack Kallmeyer posted a new activity comment 1 year ago

    1 year ago
    1 year ago

    This one is 25 mm

  • Jack Kallmeyer posted a new activity comment 1 year ago

    1 year ago
    1 year 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.

    • Oh my gosh, it was so small my old eyes couldn’t see it!!! Worst part is – I did enlarge it. Okay, I’ll put that in the field notes for good measure.

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