Atlas of Pollen and Spores of the Polish Neogene, Volume 4 contains description and photographic documentation of the sulcate and colporate groups of pollen grains. Altogether 212 species belonging to 75 fossil genera, 57 of which have botanical affinity indicated in the name, are described.
All described fossil-taxa are included within 55 extant families and 27 orders. In total 5 new genera and 44 new species were described and 26 taxa have their diagnoses complemented, 26 new combinations were described, and new status is proposed for two taxa. All described pollen species have been documented on 134 photographic plates. Microphotographs were taken under Light Microscope (LM) and several more important details were documented using Scanning Electron Microscope (SEM). The lay-out of Atlas of Pollen and Spores of the Polish Neogene, Volume 4, morphological descriptions and illustrations of pollen were in general made as in the preceding volumes.
All taxa are ordered after botanical affinity and morphology by means two morphological groups (sulcate, and colporate) and the described genera are included to extant orders (Stevens et al. 2012). In the orders families are ordered alphabetically, and within families, genera and species are also ordered alphabetically, with the exception of the type species, that is placed directly after the description of the genus.