Hrabalicrinus zitti gen. et sp. nov., and other Upper Jurassic crinoids (Echinodermata, Crinoidea) from the Brno area (Czech Republic)

Jurassic (Oxfordian) crinoids from the Brno area (Czech Republic) are described in details for the first time. A rich crinoid assemblage consisting of cups, isolated cup elements, brachial plates, columnals, pluricolumnals, and cirrals is assigned to isocrinids Isocrinus amblyscalaris (Thurmann), Balanocrinus subteres (Münster), B. pentagonalis (Goldfuss), Isocrinida indet., comatulid Hrabalicrinus zitti gen. et sp. nov., cyrtocrinids Lonchocrinus sp., Cyrtocrinus cf. nutans (Goldfuss), Pilocrinus moussoni (Desor), Tetracrinus moniliformis Münster, Cyrtocrinida indet., and millericrinids (Millericrinida indet.). Crinoids already mentioned from the Jurassic strata of the Czech Republic are subsequently revised. Apart from the isolated remains of Isocrinida, Millericrinida, and Thiolliericrinida, the presence of any other taxon reported from this area should be treated with extreme caution. A rare example of non-regenerative columnal healing (the so-called callus) in I. amblyscalaris is also described. Based on sedimentology and microfacies, the Jurassic limestones were deposited in various palaeoenvironments of upper carbonate platform and shelf lagoon (0 to > 50 m palaeodepth).