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 Ditrupa arietina (O. F. Mueller , 1776) Ditrupa arietina (O.F. Mueller , 1776) | Ditrupa subulata (Deshayes, 1825) in Berkeley, 1835 Notes Hartley (2014) points out different ecological preferences between populations of Ditrupa arietina in the Mediterranean and in the Atlantic and a sudden increase in population densities in the Western Mediterranean in the late 1980s, indicating the possibility of an unknown cryptic invasive species.