Fig. 1

Maximum-likelihood tree of 1000 insect visual opsins sequences. The LW2b, LW2a, SW and UV opsins are red, green, blue and purple, respectively. Branches were collapsed to the highest rank when species grouped together within the same family, suborder or order. Node circles indicates UFbootstrap and SH-alrt value, only nodes over SH-alrt support ≥ 80% and UF-bootstrap ≥ 95% (solid circles) and SH-alrt support ≥ 80% and UF-bootstrap ≥ 90% (open circle) are represented