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. Thin, isodont narrow pectinate, with short and slender teeth, chaetiger 47; B. Thin, isodont narrow pectinate, with short and slender teeth, chaetiger 189; C. Thick, isodont wide, with long and wide teeth, chaetiger 44 before pygidium; D. Thick, anodont wide, with long and wide teeth, chaetiger 256; E. Compound spinigers, chaetiger 44 before pygidium; F. Compound spiniger, chaetiger 211; G. Compound spinigers, chaetiger 47; H. Unidentate subacicular hook, chaetiger 47; I. Bidentate subacicular hook, chaetiger 73 before pygidium. A, B. from M. teretiuscula (Schmarda, 1861a) syntype 1 (NHMW type 1092); C, E, I. from M. teretiuscula (Schmarda, 1861a) syntype 2 (NHMW type 1092); D, F. from Marphysa simplex Crossland, 1903 syntype 1 (BNHM 1955.4.1.21-25); G, H. from M. simplex Crossland, 1903 syntype 2 (BNHM 1955.4.1.21-25). Scale bars: 20 μm (A–D, G); 60 μm (E); 50 μm (F, H, I).