Supplementary material 1 from: Faulwetter S, Simboura N, Katsiaras N, Chatzigeorgiou G, Arvanitidis C (2017) Polychaetes of Greece: an updated and annotated checklist. Biodiversity Data Journal 5: e20997. https://doi.org/10.3897/BDJ.5.e20997

A list of references (unpublished datasets by the Hellenic Centre for Marine Research) and online resources which were used to assess the occurrence status of many species. This list is merely for completeness and for the convenience of the reader