Zvláštní oko hmyzího druhu Xenos peckii. A je hlava samečka, B detail jeho oka, M. James et al., The unusual eyes of Xenos peckii (Strepsiptera: Xenidae) have green- and UV-sensitive photoreceptors, Journal of Experimental Biology 2016 219: 3866-3874

Zvláštní oko hmyzího druhu Xenos peckii. A je hlava samečka, B detail jeho oka,  M. James et al., The unusual eyes of Xenos peckii (Strepsiptera: Xenidae) have green- and UV-sensitive photoreceptors, Journal of Experimental Biology 2016 219: 3866-3874