Polychaetes of Greece: an updated and annotated checklist Author Faulwetter, Sarah Author Simboura, Nomiki Author Katsiaras, Nikolaos Author Chatzigeorgiou, Giorgos Author Arvanitidis, Christos text Biodiversity Data Journal 2017 5 20997 20997 http://dx.doi.org/10.3897/BDJ.5.e20997 journal article http://dx.doi.org/10.3897/BDJ.5.e20997 1314-2828--20997 Eurythoe complanata (Pallas, 1766) Ecological interactions Native status Non-native (casual) Notes Species complex. Reported from Greece by Chatzigeorgiou et al. (2016) based on a single specimen (identified using Day (1967) and Barroso et al. (2010) ). Eurythoe complanata is a complex of cryptic and pseudo-cryptic species ( Barroso et al. 2010 , Arias et al. 2013a ), containing two cryptic forms of Eurythoe complanata and the species Eurythoe laevisetis Fauvel, 1914, which differs from Eurythoe complanata sensu stricto by the absence of harpoon-shaped notochaetae ( Arias et al. 2013a ). In the Mediterranean, two of the species in this species complex occur: Eurythoe laevisetis in the central and western basin, and Eurythoe complanata in the eastern basin and the Alboran Sea. Both species are native to the Caribbean and tropical Atlantic and non-native to the Mediterranean, but their exact pathways of introduction to the Mediterranean and thus the identity of the species occurring in the eastern basin are yet unknown ( Arias et al. 2013a ).