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  • Anatifopsis styloidea DEHM, 1934


    Images:

    oilshale

    Taxonomy

    Homolazoan

    Kingdom: Animalia
    Phylum: Echinodermata Klein 1754
    Class: Stylophora Gill and Caster 1960
    Order: Mitrata Jaekel 1918
    Family: Kirkocystidae Caster 1952
    Genus: Anatifopsis
    Species: Anatifopsis styloidea
    Author Citation DEHM, 1934

    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

    Width: 15 mm

    Location

    Eschenbach-Bocksberg Quarry
    Bundenbach
    Rheinland-Pfalz
    Germany

    Comments

    Alternative names: Mitrocystites styloideus or Dalejocystis styloideus.

    Taxonomy from Mindat.org.

    Description (Südkamp 2017, p. 98): "The theca is roughly semicircular. It consists of two large thin plates on the oral surface, which nearly completely overlap the dorsal surface. The margin in the neighbourhood of the aulacophore is sometimes arcuate and bears medially the slender insertion of the aulacophore. Next to it, on the oral surface, short transverse riblets can be seen, which are directed to the aulacophore. The lateral margins of the dorsal surface bear a row of knots. The elongate aulacophore bears spines, which taper to the end. The anterior large ossicle (stylocone) has the appearance of a buttercup. At the other edge of the body a strong spine is attached, but is missing in most species."

    Name derivation: Stylos = pillar.

    Identified by oilshale.

    References:

    Dehm, R. 1934. Untersuchungen an Cystoideen des rheinischen Unterdevons. Sitzungsberichte der Mathematisch-Naturwissenschaftlichen Abteilung der Bayerischen Akademie der Wissenschaften zu München für 1934: 19-43.
    Südkamp, W. (2017) Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil. München 2017. ISBN978-3-89937-221-2.




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