Vachonisia is a Devonian marrellomorph known from the Lower Devonian Hunsrück Shale. It grows in a similar fashion to the other Hunsruck marrellomorph, Mimetaster, and is closely related to the Silurian Xylokorys. It is known from 20 specimens; its whole body is covered by a shield-like carapace. - Wikipedia (en) 30.07.2016
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