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Asa Kaplan

Profile picture of Asa Kaplan

Asa Kaplan

@asa-kaplan
St Louis, MO
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  • Profile picture of Asa Kaplan

    Asa Kaplan joined the group Group logo of University of Michigan Museum of PaleontologyUniversity of Michigan Museum of Paleontology 1 year, 5 months ago

    1 year, 5 months ago
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    Asa Kaplan's profile was updated 1 year, 6 months ago

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    Asa Kaplan joined the group Group logo of Alabama Museum of Natural HistoryAlabama Museum of Natural History 1 year, 6 months ago

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  • Profile picture of Asa Kaplan

    Asa Kaplan replied to the topic Any ideas as to what these are? in the forum What Is It? 2 years, 1 month ago

    2 years, 1 month ago
    2 years, 1 month ago

    I don’t know about the big trapezoid, but the little lineated piece certainly looks like vascular plant material. Land plant even. I find these in Middle Devonian shaley limestones, even those whose paleoenvironments had paleodepths below normal wave-base.

  • Profile picture of Asa Kaplan

    Asa Kaplan replied to the topic Brachiopod from Madison group Misson in the forum What Is It? 2 years, 8 months ago

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    For a more extensive list of candidate brachiopods, see

    http://ftp.maps.canada.ca/pub/nrcan_rncan/publications/ess_sst/122/122462/bu_378.pdf

    Among orthotetidines, this publication lists only Schellwienella? cf . S. alternata Weller, 1914, with some good photos on plate 1.

     

  • Profile picture of Asa Kaplan

    Asa Kaplan replied to the topic Brachiopod from Madison group Misson in the forum What Is It? 2 years, 8 months ago

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    David, nice fossil. If this is definitely from the Madison Limestone then it is Mississippian in age — far too young to host Rafinesquina or Strophomena. I do concur that it is a strophomenide brachiopod, most likely an orthotetidine.  This article is a good jumping-off point:

    https://imnh.iri.isu.edu/digitalatlas/geo/gsa/papers/gsac1p4.pdf

  • Profile picture of Jennifer Bauer

    Jennifer Bauer and Profile picture of Asa KaplanAsa Kaplan are now friends 2 years, 9 months ago

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  • Profile picture of Asa Kaplan

    Asa Kaplan replied to the topic Identify this! in the forum What Is It? 3 years, 3 months ago

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    I’m with Jack — this looks like a Phacopid trilobite, perhaps even Phacops. In WV these are found in Middle Devonian rocks like the Marcellus Shale and the Mahantango Formation. Mahantango and Marcellus trilobites lived about 385 million years ago.

    But the Eastern panhandle of WV….aren’t all those shales metamorphosed? Maybe not all, but all…[Read more]

  • Profile picture of Asa Kaplan

    Asa Kaplan replied to the topic FOSSIL Webinar Series in the forum Upcoming Opportunities 3 years, 3 months ago

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    Oh, I see. Thanks, Lisa. I would like to see better support on this website for event subscription, so that updates go out to those folks who intended to attend. Otherwise, let’s leave event functionality to a platform like Eventbrite or even Facebook that can handle the relevant tasks.

    Thanksgiving food………..mushroom gravy. I would like to…[Read more]

  • Profile picture of Asa Kaplan

    Asa Kaplan replied to the topic FOSSIL Webinar Series in the forum Upcoming Opportunities 3 years, 3 months ago

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    3 years, 3 months ago

    Fossil ID webinar is tonight at 4pm PST / 5pm MST / 6pm CST / 7pm EST, right? at http://idigbio.adobeconnect.com/room

  • Profile picture of Asa Kaplan

    Asa Kaplan replied to the topic I found this in the forum What Is It? 3 years, 4 months ago

    3 years, 4 months ago
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    The rock there is either early Cenozoic or else Mesozoic. Ediacarans are out of the question, not only for this reason, but for morphological reasons: no known Ediacaran is spiral- or tube-shaped.

    This appears to be the trace of a worm or other creature that fed in a spiral outward from a central starting point. It consumed the sediment whole and…[Read more]

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    Asa Kaplan replied to the topic FOSSIL Webinar Series in the forum Upcoming Opportunities 3 years, 5 months ago

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    Ah very cool thanks.

  • Profile picture of Asa Kaplan

    Asa Kaplan replied to the topic FOSSIL Webinar Series in the forum Upcoming Opportunities 3 years, 5 months ago

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    Thanks for the tag, EG! I have no idea what this webinar is or where to find it, but I’d like to learn about the lesser-known soft-bodied preservation localities like Blue Island. And maybe a review of some amazing sites that are now off-limits (rather than played out).

  • Profile picture of Asa Kaplan

    Asa Kaplan replied to the topic Help identifying fossil from Texas in the forum What Is It? 3 years, 5 months ago

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    Although often mistaken for a trilobite, this is not a fossil at all. You will note that you can crush it with your fingernail.

    It is the egg case of a praying mantis from the 2010’s.

  • Profile picture of Asa Kaplan

    Asa Kaplan replied to the topic Ordovician, southwestern Wisconsin, in the forum What Is It? 3 years, 7 months ago

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    Julie @julie-niederkorn, you have opened my eyes! I was assuming the entire fossil to be a pygidium, but now I take your point that it comprises the whole thorax plus the pygidium. And that makes it an excellent match for the thoracopygidium of Thaleops o…[Read more]

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    Asa Kaplan changed their profile picture 3 years, 7 months ago

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    Asa Kaplan's profile was updated 3 years, 7 months ago

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    Asa Kaplan replied to the topic Ordovician, southwestern Wisconsin, in the forum What Is It? 3 years, 8 months ago

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    Guide to trilobite morphology:

    https://www.trilobites.info/trilomorph2007.gif

     

  • Profile picture of Asa Kaplan

    Asa Kaplan replied to the topic Ordovician, southwestern Wisconsin, in the forum What Is It? 3 years, 8 months ago

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    The cephalon appears to belong to some ceraurine trilobite. For example, here is Ceraurus. Note the glabellar lobes and how they’re connected to the other parts of the cephalon.

    http://strata.uga.edu/cincy/fauna/trilobita/Ceraurus.html

  • Profile picture of Asa Kaplan

    Asa Kaplan replied to the topic Ordovician, southwestern Wisconsin, in the forum What Is It? 3 years, 8 months ago

    3 years, 8 months ago
    3 years, 8 months ago

    That pygidium is definitely not Flexicalymene! Note in this photo how triangular Flexicalymene‘s pygidium i…[Read more]

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Development of myFOSSIL is based upon work largely supported by the National Science Foundation under Grant No. DRL-1322725. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.

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