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Millericrinus milleri (Schlotheim, 1823) (Crinoidea: Millericrinida) from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, SW Germany)

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Abstract:

The present paper describes a large Late Jurassic millericrinid, Millericrinus milleri, from the Upper Kimmeridgian Nusplingen Lithographic Limestone (Beckeri Zone, Ulmense Subzone) of south-western Germany. Based on this material which includes a complete calyx, a definitive generic assignation was possible. For comparison purposes, the cup of this crinoid from Oxfordian deposits of southern Poland was studied. The crinoid is characterised by a large, distinctly pentagonal, very low and wide cup. In comparison to a closely related Jurassic species, Millericrinus charpyi, the present find comes from younger strata. Moreover, M. milleri differs from M. charpyi by possessing a smooth lateral surface of calyx. In case of M. charpyi, it is covered with ten oval bosses. The crinoid was co-occurring with some special echinoids and bivalves and other typical indicators of coralliferous shallow water deposits that suggests the neighbourhood of firmgrounds or hardgrounds in a shallow water environment, which is completely eroded today.

Keywords: GERMANY; LITHOGRAPHIC LIMESTONES; PALAEOCOLOGY; PALAEOGEOGRAPHY; POLAND; PRESERVATION; TAPHONOMY

Document Type: Research Article

DOI: http://dx.doi.org/10.1127/0077-7749/2008/0247-0001

Publication date: January 1, 2008

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