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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Europe
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Central Europe
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Czech Republic (1)
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Germany (1)
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Poland (1)
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Switzerland (1)
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Upper Rhine Graben (1)
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Western Europe
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France (1)
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Luxembourg (4)
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commodities
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barite deposits (1)
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metal ores
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copper ores (1)
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iron ores (1)
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lead ores (1)
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manganese ores (1)
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tin ores (1)
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zinc ores (1)
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mineral deposits, genesis (1)
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placers (1)
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elements, isotopes
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isotope ratios (1)
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isotopes
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stable isotopes
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S-34/S-32 (1)
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Sr-87/Sr-86 (1)
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metals
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alkaline earth metals
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strontium
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Sr-87/Sr-86 (1)
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sulfur
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S-34/S-32 (1)
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fossils
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Chordata
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Vertebrata
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Tetrapoda
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Reptilia
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Diapsida
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Sauropterygia
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Plesiosauria (1)
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Invertebrata
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Echinodermata
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Asterozoa
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Stelleroidea
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Ophiuroidea (1)
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microfossils (1)
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geologic age
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Cenozoic (1)
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Mesozoic
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Jurassic
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Lower Jurassic
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Pliensbachian (1)
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Toarcian
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lower Toarcian (1)
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Triassic
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Middle Triassic
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Muschelkalk (1)
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Paleozoic
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upper Paleozoic (1)
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Primary terms
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barite deposits (1)
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Cenozoic (1)
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Chordata
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Vertebrata
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Tetrapoda
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Reptilia
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Diapsida
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Sauropterygia
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Plesiosauria (1)
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data processing (1)
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diagenesis (1)
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Europe
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Central Europe
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Czech Republic (1)
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Germany (1)
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Poland (1)
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Switzerland (1)
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Upper Rhine Graben (1)
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Western Europe
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France (1)
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Luxembourg (4)
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geophysical methods (1)
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glacial geology (1)
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ground water (1)
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hydrology (2)
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Invertebrata
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Echinodermata
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Asterozoa
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Stelleroidea
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Ophiuroidea (1)
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isotopes
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stable isotopes
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S-34/S-32 (1)
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Sr-87/Sr-86 (1)
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Mesozoic
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Jurassic
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Lower Jurassic
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Pliensbachian (1)
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Toarcian
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lower Toarcian (1)
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Triassic
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Middle Triassic
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Muschelkalk (1)
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metal ores
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copper ores (1)
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iron ores (1)
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lead ores (1)
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manganese ores (1)
-
tin ores (1)
-
zinc ores (1)
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metals
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alkaline earth metals
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strontium
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Sr-87/Sr-86 (1)
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mineral deposits, genesis (1)
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orogeny (1)
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paleoecology (1)
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Paleozoic
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upper Paleozoic (1)
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placers (1)
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sea-level changes (1)
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soils (1)
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sulfur
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S-34/S-32 (1)
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soils
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soils (1)
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Luxembourg
Abstract Ophiuroids, the slender-armed cousins of starfish, constitute an important component of modern marine benthos and have been used successfully in the exploration of (palaeo)-ecological and evolutionary trends, yet their fossil record is still poorly known. One of the major gaps in the known palaeobiodiversity of this group coincides with a global palaeoenvironmental crisis during the early Toarcian (Early Jurassic, 183 myr ago), known as the Jenkyns Event. Here we describe ophiuroid remains retrieved from a series of samples from the Dudelange (Luxembourg) drill core, which spans the lower part of the Toarcian, between the top of the Pliensbachian and the onset of the Jenkyns Event. A total of 21 species are recorded, including three new genera and 12 new species. Ophiuroid diversity and abundance fluctuate in parallel with depositional facies, with lowest values coinciding with black shales. Highest diversities, including exceptional occurrences of taxa nowadays restricted to deep-sea areas, are recorded from just below the black shales, corresponding to the onset of the Jenkyns Event. Our results show that even small (100 g) bulk sediment samples retrieved from drill cores can yield numerous identifiable ophiuroid remains, thus unlocking this group for the study of faunal change across palaeoenvironmental crises.