One of the largest collections of Devonian brachiopods from the Rhenish Slate Mountains is stored in the section Palaeozoology III. The collection is permanently supplemented by own collections, donations, and acquisitions.
Of great importance are also the collections of Devonian molluscs. The extensive “Wetteldorfer Richtschnitt” collections from the GSSP at Wetteldorf in the Eifel Hills contain bed-by-bed collections from the succession at the Lower/Middle Devonian boundary stratotype (GSSP). The Hunsrück Slate collection and the X-ray collection by Wilhelm Stürmer are of high scientific value. The collections include the following: