Fossil Friday: The Abrupt Origin of Butterflies
This Fossil Friday features a wonderful fossil of the nymphalid butterfly Prodryas persephone from the famous Eocene fossil locality of Florissant in Colorado. Even though the insect order Lepidoptera is represented by small caddisfly-like and moth-like taxa in Mesozoic sediments, there is no Mesozoic fossil record of real butterflies or any other “macrolepidopterans” (Sohn et al. 2012, 2015). They appear abruptly with modern families like Hesperiidae (Jong 2016), Pieridae, Papillionidae, and Nymphalidae in the Eocene, without any evidence for a gradual evolution of these modern butterfly families and totally contrary to evolutionist estimates, which placed their diversification in the Early Cretaceous (Wahlberg 2006, Heikkilä et al. 2012, Jong 2017). This phenomenon could rightfully be called a Tertiary Butterfly Explosion analogous to the Cambrian Explosion of animal phyla. It is yet another example of the general pattern of abrupt appearances of new biological groups in the fossil record that contradict any Darwinian expectations and better resonates with a design perspective.
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