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  • Plectodiscus discoideus (Rauff, 1983)


    Images:

    oilshale

    Taxonomy

    “By the Wind Sailor”

    Kingdom: Animalia
    Phylum: Cnidaria
    Class: Hydrozoa Owen, 1843
    Order: Hydroida
    Family: Velellidae Brand 1835
    Genus: Plectodiscus
    Species: Plectodiscus discoideus
    Author Citation (Rauff, 1983)

    Geological Time Scale

    Eon: Phanerozoic
    Era: Paleozoic
    Period: Devonian
    Sub Period: None
    Epoch: Early
    International Age: Emsian (early)

    Stratigraphy

    Hunsrück Slate Group
    Kaub Formation

    Provenance

    Acquired by: Purchase/Trade

    Dimensions

    Diameter: 8 cm

    Location

    Eschenbach-Bocksberg Quarry
    Bundenbach
    Rhineland-Palatinate
    Germany

    Comments

    Preserved from the ventral side.

    Taxonomy from Yochelson et al. 1983.

    Description from Südkamp 2017, p. 28:" The umbrella is disc-like or circular. The numerous tentacular appendages on the ventral side vary in lenght (and presumably function) and some appear to have been branched."

    Reconstruction from Yochelson et al. 1983, p. 40:

    image.png.b7e5b08a3af62bb078a4af0d44abcc2e.png

    References:

    Yochelson, Ellis L. & Stürmer, Wilhelm & Stanley, George D. (1983). Plectodiscus discoideus (Rauff): a redescription of a chondrophorine from the Early Devonian Hunsrück Slate, West Germany. Paläontologische Zeitschrift. 57. 39-68. 10.1007/BF03031748.
    Südkamp, W. (2017) Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil, München.




    User Feedback


    Decidedly something different and very interesting. :)

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    The Amateur Paleontologist

    Posted

    Wonderful specimen! Just 1 question tho, where do you get all these Hunsrück specimens from?? :)

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    I was wondering the same thing..

    I want one, Do you have any spares? I guess not  :wacko:

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    I'm almost a fossil myself and have been collecting fossils for 50 years. These are partly items I found myself but also fossils purchased or exchanged. I bought this piece.

    I own a second jellyfish from Bundenbach. This (incomplete) jellyfish below is preserved from the dorsal side. The other jellyfish is preserved from the ventral side.

    5b813b453a0ba_Cn1728QuallenondetUntDevonBundenbachD292508530984Cn1728.thumb.jpg.ec1b8362914528e3de8eed4d93063c5a.jpg

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    Well that's nice, to have a dorsal and a ventral, even if one is only half complete.

    Apparently those critters have been around a long time.

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