The presence of one pair of eyespots, longitudinal dorsal pigmented stripes, and rows of black-tipped papillae as well as one annulus between gonopores and diffuse salivary glands match the description of Helobdella papillata. This species belongs to the “ triserialis ” complex of species defined by Sawyer, 1986. Helobdella triserialis (Blanchard, 1894) was originally described based on specimens collected in Chile. However, because of the high degree of variation in the various forms in the New World, Ringuelet (1943) lumped them all under “ H. triserialis. ” Siddall and Borda (2003) found that at least North and South American forms each constitute distinct evolutionary lineages and resurrected Verrill’s name, Helobdella papillata, for North American forms, all of which are genetically similar regardless of pigmentation. Specimens were found on the underside of submerged rocks and wood.