The pre-Paleogene (older than 65 million years - MY) specimens (about 6 thousand incl. holotypes of several Mesozoic genera and species) are stored as: rock fragments with fossils preserved, fossilized wood sections, cuticle preparations and sporomorph slides. Paleogene-Neogene (65 MY – 2,6 MY) and Quaternary (younger than 2.6 MY) collections additionally comprise numerous (sub)fossil fruit, seed, wood and leaf samples.