Vachonisia

Vachonisia is a Devonian marrellomorph known from the Lower Devonian Hunsr├╝ck 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. ...
Found on http://en.wikipedia.org/wiki/Vachonisia
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