Unravelling the convoluted nomenclature of Marphysa simplex (Annelida, Eunicidae) with the proposal of a new name and the re-description of species

Marphysa teretiuscula (Schmarda, 1861a). A. Anterior end, dorsal view; B. Anterior end, ventral view; C. Anterior end, lateral view; D. Anterior end, dorsal view; E. Anterior end, lateral view; F. Median region, ventral view; G. Pygidium, dorsal view; H. Maxillary apparatus, dorsal view; I. Left MI-II-III-IV-V, lateral view; J. Attachment lamella in left side, dorsal view; K. Attachment lamella in right side, lateral view; L. Mandible, ventral view. A–C, H–L. from M. teretiuscula (Schmarda, 1861) syntype 1 (NHMW type 1092); D–G. from Marphysa simplex Crossland, 1903 syntype 1 (BNHM 1955.4.1.21-25). al-MIII: attachment lamella MIII; al-MIV: attachment lamella MIV; al-MIV-L: attachment lamella MIV on left side; al-MIV-R: attachment lamella MIV on right side; MI-R: Maxilla I on right side; MII-R: Maxilla II on right side. Scale bars: 2.3 mm (A–C); 3.1 mm (D–F); 1.16 mm (G); 3.0 mm (H, I, L); 1.13 mm (J); 0.9 mm (K).