Acta Palaeontologica Polonica

Xenognath type of polychaete jaw apparatuses

Piotr Mierzejewski and Grażyna Mierzejewska

Acta Palaeontologica Polonica 20 (3), 1975: 437-444

A new type of ?eunicid jaw apparatuses designated xenognath is described; it differs from previously known jaw. apparatuses in having the denticulated compound jaws perpendicular to apparatus axis. It includes the Ordovician genus Archaeoprion nov., assigned to a new family Archaeoprionidae.

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