Fig. 1. A in A Sponge-dwelling Ribbon Worm, Tetrastemma carneum sp. nov. (Nemertea: Monostilifera) Collected off Ofunato, Japan

Fig. 1. A collection site of Tetrastemma carneum sp. nov., off Ofunato, Iwate, Japan. A, Map showing the collection site of the specimens examined in the present study (red circle); B, demosponges from which specimens of T. carneum sp. nov. were found; C, magnification of demosponges—specimens of T. carneum were collected from a yellow demosponge attached to the bottom of a white demosponge (arrowhead).