Species of Cothurnia at Sylt, North Sea.

Küsters (1974) reported 11 species of Vaginicolidae collected at Königshafen in the northern part of Sylt in 1969 and 1970 from experimentally exposed artificial substrates, viz, Cyclodonta bipartita (Stokes, 1885) Matthes, 1958, Cothurnia angusta Kahl, 1933, C. ceramicola Kahl, 1933, C. coarctata Kahl, 1933, C. curvula (Entz, 1876) Entz, 1884, C. cypridicola Kahl, 1933, C. innata O.F. Müller, 1786, C. inflata Stokes, 1893, C. maritima Ehrenberg, 1838, C. nodosa Claparède & Lachmann, 1858, and C. pedunculata Dons, 1918 . We did not find any of these species of Cothurnia on our kinorhynch specimens of Setaphyes kielensis collected at Königshafen in 1998 or on S. dentatus and S. kielensis collected at Kampen in 1988 and 2016 but a different species, viz, C. buetschlii (Tables 3, 4).