Bizarre Mimetaster Bundenbach Marrellamorph Fossils

Mimetaster hexagonalis

(Gürich, 1931)

Phylum Arthropoda, Class Marrellomorpha

Geological Time: Lower Devonian, Seigenian/Emsian Stage

Size (25.4 mm = 1 inch): Fossils are 20 mm by 27 mm, 20 mm by 9 mm, and 25 mm by 22 mm on a 140 by 135 mm matrix

Fossil Site: Hunsrück Slate, Bundenbach Germany

Code: GF60

Price: Sold

Mimetaster hexagonalis Marrellamorph FossilsDescription: Well-preserved specimens of a most unusual marrellamorph known as Mimetaster. The Hunsruck slate is famous for its fossils, many of which have pyritization present. Rapid burial and pyritization was what led to the many wonderful examples of early Devonian life from the region. The chemistry of the siltMimetaster Bundenbach Marrellamorph was such that low organic content and high levels of iron and sulfur allowed the pyrite to diffuse into the tissues rather than be deposited in the sediment. The mudstones were metamorphosed into slate during the Carboniferous. The slate was quarried for roofing tiles, and the quarrymen would save the fossils for later sale. Now that the quarries are no longer open, future supplies of these wonderfully-preserved benthic organisms will only come from existing collections. Mimetaster is undoubtedly the most unusual of Bundenbach organisms. Many have been found preserved with attached sponges, leading some researchers to believe the sponges served as a sort of camouflage as in the modern decorator crab. It is believed that Mimetaster was a social organism, a fact that seems to be borne out by the association of three of these bizarre marrellamorphs on this one plate.

Fossils for Sale Information

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Mimetaster Bundenbach Marrellamorph Fossils

Mimetaster Bundenbach Marrellamorph

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