The collections currently exceeds 340,000 catalogued lots (= specimen series) with continuing growth. Research and collecting traditionally focused on the phylum Mollusca with more than 328,000 cataloged lots. Non-mollusk invertebrates are represented by ca. 14,500 cataloged lots with the Arthropoda (ca. 50%), Annelida (20 %), Echinodermata (8 %), Cnidaria (7%) and Porifera (5 %) best represented.