In this map you can see the records for the nemertean Lineus longissimus in Spain and Portugal. Click one record and a pop-up window will show you the author of that record and its reference, with a picture of the species and a link to find more details about that species.

You can check a full-size map with the rest of the 86 species of Spanish and Portuguese nemerteans and many more useful options here.

You can also download the shapefiles of all the species from here.