List of the studied authors
Sars, 1907 a (p.25, Rem.F); 1925 (p.316, figs.F); Sewell, 1932 (p.329); 1947 (p.12); Vervoort, 1957 (p.140); 1965 (p.148,
Rem.); Bradford-Grieve & al., 1999 (p.883, 938, figs.F); Vives & Shmeleva, 2007 (p.269, figs.F, Rem.)