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 Placostegus tridentatus (Fabricius, 1779) Notes The species exhibits two different morphotypes in the Atlantic and the Mediterranean. Mediterranean specimens are smaller than Atlantic specimens and show differences in morphological details of the tube (for a detailed description see Sanfilippo (2003) ).