''Vachonisia'' is a Devonian

marrellomorph Marrellomorpha are an extinct group of arthropods known from the Cambrian to the Early Devonian. They lacked mineralised hard parts, so are only known from areas of exceptional preservation, limiting their fossil distribution. The best known me ...

known from the Lower Devonian

Hunsrück Slate The Hunsrück () is a long, triangular, pronounced upland in Rhineland-Palatinate, Germany. It is bounded by the valleys of the Moselle-Saar (north-to-west), the Nahe (south), and the Rhine (east). It is continued by the Taunus mountains, past ...

. 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.

References

Devonian animals Prehistoric arthropod genera Fossils of Germany Hunsrück Slate fossils Marrellomorpha {{paleo-arthropod-stub