Polychaetes of Greece: an updated and annotated checklist Faulwetter, Sarah Simboura, Nomiki Katsiaras, Nikolaos Chatzigeorgiou, Giorgos Arvanitidis, Christos Biodiversity Data Journal 2017 5 20997 20997 8578X 1242986 Gravier, 1906 Gravier 1906 Polychaeta Terebellidae Terebella CoL Animalia Terebella ehrenbergi Terebellida 0 20997 Annelida species ehrenbergi  Ecological interactions  Native status Non-native (questionable)  Notes Questionable status. Reported from Greece by Arvanitidis (1994). Originally from the Red Sea, in the Mediterranean also reported from the western Mediterranean (  Peres1954), Cyprus ( Ben-Eliahu 1972b) and Israel ( Ben-Eliahu 1976b). The taxonomy of the species is confused, as two different descriptions exist in literature: Terebella ehrenbergisensu Day, 1967 and Terebella ehrenbergisensu Rullier, 1972, differing in the shape of the notochaetae (denticulated / smooth) and the number of abdominal chaetigers with notochaetae (posterior 20-40 segments without notochaetae vs. posterior 10-15 segments) ( Ben-Eliahu 1976b). Ben-Eliahu (1976b)compared material from the Israeli coasts of the Mediterranean with museum specimens from the Red Sea identified by Gravier and by Fauvel and found the former to lack calyx-type chaetae on abdominal chaetigers. However, as this may be a size-dependent character, it is currently unknown whether Mediterranean species belong to Terebella ehrenbergiGravier, 1906 or to a different species.