File:Chotecops ferdinandi fossil trilobite (Kaub Formation, Hunsruck Slate Group, Lower Devonian; Budenbach area, western Germany) 2 (15160354959).jpg
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Summary
| Description |
Chotecops ferdinandi fossil trilobite (x-ray photograph showing exoskeleton & appendages) from the Devonian of Germany (public display, FMNH PE 55318, Field Museum of Natural History, Chicago, Illinois, USA). The Devonian-aged Hunsrück Slate Lagerstätte is one of the most famous soft-bodied fossil deposits. Hunsrück fossils have been pyritized (replaced with pyrite/“fool’s gold” - FeS2). They occur in a black slate matrix - the result is beautiful brassy gold colored fossils on a dark background. A diverse biota has been described, including trilobites with preserved legs & gills, crinoids, starfish & brittle stars, “worms”, molluscs, corals, conulariids, sponges, cnidarians, land plants, “algae”, fish, plus various unusual arthropods & echinoderms. The Hunsrück Slate Lagerstätte occurs in the Kaub Formation (Hunsrück Slate Group, lower Emsian Stage, upper Lower Devonian) in the Budenbach area of western Germany. Preparation of Hunsrück fossils is notoriously difficult, and many of the pyritized fossils crumble to dust from pyrite disease over many years. Relatively recently, a “secret” air abrasion method has been successfully used to prepare Hunsrück fossils, using an abrasive grit composed of metallic iron powder mixed with potato starch. Shown here is an x-ray photograph of a complete, pyritized fossil trilobite from Hunsrück. Legs, antennae, and other soft parts are visible - the nonmineralizing parts have also been pyritized. This is Chotecops ferdinandi (Kayser, 1880) (formerly placed in the genus Phacops), the most common macrofossil in the Hunsrück Slate. Chotecops is of the few trilobite species known with preserved soft parts. Classification: Animalia, Arthropoda, Trilobita, Polymerida, Phacopidae Some info. from: Bartels, C., D.E.G. Briggs & G. Brassel. 1998. The Fossils of the Hunsrück Slate, Marine Life in the Devonian. Cambridge, England. Cambridge University Press. 309 pp. |
| Date | |
| Source | Chotecops ferdinandi fossil trilobite (Kaub Formation, Hunsruck Slate Group, Lower Devonian; Budenbach area, western Germany) 2 |
| Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15160354959. It was reviewed on 6 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:56, 6 May 2015 | | 1,399 × 1,971 (1.31 MB) | Natuur12 | Transferred from Flickr via Flickr2Commons |
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