Exceptionally preserved conulariids and an edrioasteroid from the Hunsrück Slate (Lower Devonian, SW Germany)

作者: HEYO VAN ITEN , WOUTER H. SÜDKAMP

DOI: 10.1111/J.1475-4983.2010.00942.X

关键词: Hunsrück SlateDevonianPaleontologySingle clusterExtant taxonTaphonomyGeologyAnatomical structures

摘要: Abstract:  Nineteen partial specimens of Conularia sp., together with an articulated agelacrinitid edrioasteroid and several discinid brachiopods, occur in close association a probable biological substrate on small slab silty Hunsruck Slate (Lower Devonian, Emsian) from Bundenbach, Germany. Most the conulariids V-like pairs or single cluster 12 arranged fan-like radial pattern. Together (possibly) probably were attached to life then buried possibly killed by influx mud. The apertural end many is partially covered inwardly folded short lappets, which may have closed response rapid (but gentle) burial. Rock matrix region peridermal cavity nearly all exhibits irregular, variably dense concentrations pyrite. almost exclusively within conulariids, where they formed as result decay retracted conulariid soft parts. Although lack clearly defined anatomical features that can be unambiguously homologized particular structures any extant taxon, their form distribution are consistent hypothesis polypoid scyphozoans.

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