Revision of abranchiate species of Marphysa de Quatrefages, 1865 and their transference to Nicidion Kinberg, 1865 (Eunicidae: Annelida) with redescription of the type species N. cincta Kinberg, 1865

Nicidion Kinberg, 1865, and Paramarphysa Ehlers, 1887, were previously recognized as abranchiate groups of Eunice Cuvier, 1817, and Marphysa de Quatrefages, 1865, respectively. However, recent studies have demonstrated Nicidion is monophyletic, and the genus was redefined. Likewise, the character presence/absence of peristomial cirri, which traditionally was used to differentiate between Nicidion and Paramarphysa, is now considered...