Fig. 1

Distribution of immergentiids. a Type species of Immergentia indicated by star and species collected from different locations indicated by a circle. Immergentia patagoniana (dark green) in the Southwest Atlantic Ocean, Immergentia stephanieae (white) and Immergentia cf. suecica (light green) from the Northeast Atlantic, Immergentia pohowskii (magenta) and Immergentia cf. zelandica (pink) from the South Pacific. Immergentiid traces from new locations with known coordinates of sample sites along the west coast of Japan, Family Beach and Pago Bay (Guam), Bay of Biscay (France) and Ramfjorden (Norway) in dark blue triangles, new locations without known coordinates in black triangles from the Caribbean Sea (Guadeloupe), Agadir (Morocco), Tenerife (Spain), Syracuse (Italy). Immergentia spp. from Helgoland in brown. b Intertidal and subtidal locations of Immergentia stephanieae (white) and Immergentia cf. suecica (light green) in and off the coast of Roscoff France