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, B. Chaetiger 3; C. Chaetiger 7; D. Chaetiger 12; E. Chaetiger 14; F. Chaetiger 47; G. Chaetiger 97; H. Chaetiger 143; I. Chaetiger 162; J. Chaetiger 44 before pygidium; K. Chaetiger 256. All chaetigers in anterior view. A, D, F, H. from M. teretiuscula (Schmarda, 1861a) syntype 1 (NHMW type 1092); J. from M. teretiuscula (Schmarda, 1861a) syntype 2 (NHMW type 1092); B, C, E, G, I, K. from Marphysa simplex Crossland, 1903 syntype 1 (BNHM 1955.4.1.21-25). Arrows in F, H. indicate the button-shaped branchial stem. Scale bars: 0.2 mm (A, D, F, H, J); 0.1 mm (B, C, E, G, I, K).