The presence of three pairs of eyespots, dorsal papillation and pigmentation pattern, two paramedial longitudinal stripes in the ventral surface, two annuli between gonopores, and a relatively large size correspond with the description of Glossiphonia elegans. North American and European forms have very similar morphological traits, to the extent that previous taxonomists (i.e., Klemm, 1982; Sawyer, 1986) considered them to be the same species: Glossiphonia complanata (Linnaeus, 1758). However, Siddall et al. (2005), using phylogenetic criteria, found that they represent different evolutionary lineages and resurrected Verrill’s 1872 name Glossiphonia elegans for the North American species (see also Madill and Hovingh, 2007). Found on the underside of submerged rocks and wood.