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 Neanthes acuminata (Ehlers, 1868) Neanthes caudata (sensu Delle Chiaje, 1827) | Nereis caudata (sensu Delle Chiaje, 1827) Notes Species complex. Reish et al. (2014) recovered four different putative cryptic species of Neanthes acuminata from worldwide locations (based on specimens traditionally referred to the species Neanthes acuminata , Neanthes caudata , and Neanthes arenaceodentata Moore, 1903, all of which are morphologically indistinguishable but could not be recovered by the analyses). From Europe, only specimens from Portugal were included in the analyses and it is currently unknown whether more cryptic species exist. Concerning nomenclature, Neanthes acuminata sensu lato should be used to refer to the species complex ( Reish et al. 2014 ). While the name Neanthes caudata is often found in literature for the European species, it is not an available name. Delle Chiaje (1825) wrongly applied the name Spio caudatus Lamarck, 1818 to a nereidid, thus the name is based on a misidentification. The next available name is Neanthes acuminata (see detailed notes by G. Read for S. caudatus Lamarck, 1818, Spio caudatus sensu Delle Chiaje, 1827 and N. caudata (sensu Delle Chiaje, 1827)), a species described from the Gulf of Naples.