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  • Hapalocrinus frechi JAEKEL, 1895


    Images:

    oilshale

    Taxonomy

    Crinoid

    Kingdom: Animalia
    Phylum: Echinodermata Klein 1754
    Class: Crinoidea Miller 1821
    Order: Monobathrida Moore and Laudon 1943
    Family: Hapalocrinidae Jaekel 1895
    Genus: Hapalocrinus
    Species: Hapalocrinus frechi
    Author Citation JAEKEL, 1895

    Geological Time Scale

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

    Stratigraphy

    Hunsrück Slate Group
    Kaub Formation

    Biostratigraphy

    Bundenbach Fossil Biota

    Provenance

    Acquired by: Purchase/Trade

    Location

    Grube Eschenbach
    Bundenbach
    Rhineland-Palatinate
    Germany

    Comments

    Taxonomy from Mindat.org.

    Together with the small brittlestar Ophiurina lymani.

    Description for the genus from Südkamp 2017, p. 106" The uniseral arms branch at least once above the second brachial. Proximally they bear pinnules on every second brachial. Beyond  the seventh of these, a pinnule is attached to every brachial. Hapalocrinus has quadrangular  or rectangular brachials. The anal tube is absent or incipient. The stem is slender. Some elements of the upper stem bear straight spines."

     

    Identified by oilshale. 

    References:

    C. Bartels, M. Poschmann, T. Schindler & M. Wuttke (with contributions by H.-G. Mittmeyer) (2002) Palaeontology and palaeoecology of the Kaub Formation (Lower Emsian, Lower Devonian) at Bundenbach (Hunsrück, SW Germany). Metalla (Bochum) 9.2, p. 105-122.
    Südkamp, W. (2017) Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil, München.




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