is an international quarterly journal publishing papers of general interest from all areas of paleontology. Since its founding by Roman Kozłowski in 1956, various currents of modern paleontology have been represented in the contents of the journal, especially those rooted in biologically oriented paleontology, an area he helped establish.

In-depth studies of all kinds of fossils, of the mode of life of ancient organisms and structure of their skeletons are welcome, as those offering stratigraphically ordered evidence of evolution. Work on vertebrates and applications of fossil evidence to developmental studies, both ontogeny and astogeny of clonal organisms, have a long tradition in our journal. Evolution of the biosphere and its ecosystems, as inferred from geochemical evidence, has also been the focus of studies published in the journal.

The language of the journal is English. Submissions may be in the form of articles, brief reports, discussions, or paper/book reviews. Papers are evaluated on the originality of data, interpretations, and ideas, and on the degree to which their findings can be generalized. All papers are subject to peer reviews.Articles accepted for publication are usually published in order of submission. Exceptions are made for papers of particular scientific significance, and for manuscripts which fully comply with editorial requirements given in the instruction for authors and require only minor changes.

Acta Palaeontologica Polonica is indexed in Biological Abstracts, Current Contents/Physical, Chemical and Earth Sciences, GeoArchive, Geological Abstracts, GeoRef, PASCAL, Petroleum Abstracts, Polish Scientific Journals Contents-Agric.& Biol. Sci., Referativnyj žurnal, Research Alert, Science Citation Index Expanded, SciSearch, and Zoological Record.

Impact Factor (IF) of Acta Palaeontologica Polonica is invariably high; the latest data for 2010 JCR indicate the IF = 1.949 which gives the journal the 11th position out of 48 periodicals ranked in the Paleontology category worldwide [see also SCI-BYTES report]. Some papers published in Acta Palaeontologica Polonica make a significant impact among professional paleontologists as recently indicated by Essential Science Indicators [see ESI notification, see also most frequently cited papers published in Acta Palaeontologica Polonica 1996-2008].

Acta Palaeontologica Polonica is an open access journal which follows the guidelines of the Budapest Open Access Initiative . Acta Palaeontologica Polonica is a member of and consortia.