Opsins in onychophora (velvet worms) suggest a single origin and subsequent diversification of visual pigments in arthropods

Lars Hering^*, Miriam J. Henze, Martin Kohler, Almut Kelber, Christoph Bleidorn, Maren Leschke, Birgit Nickel, Matthias Meyer, Martin Kircher, Paul Sunnucks, Georg Mayer

^*Corresponding author for this work