INNER WORKINGS Correction for “Inner Workings: How the butterfly got its spots (and why it matters),” by Viviane Callier, which was first published February 13, 2018; 10.1073/pnas.1722410115 (Proc Natl Acad Sci USA 115:1397–1399).
The editors note that reference 4 appeared incorrectly. The correct reference 4 was inadvertently omitted from the references list. The correct references 4, 5, 6, and 7 appear below. The references in the article online have been corrected, both in the text and in the list of references.
4. Zhang L, Mazo-Vargas A, Reed RD (2017) Single master regulatory gene coordinates the evolution and development of butterfly color and iridescence. Proc Natl Acad Sci USA 114:10707–10712.
5. Mazo-Vargas A, et al. (2017) Macroevolutionary shifts of WntA function potentiate butterfly wing-pattern diversity. Proc Natl Acad Sci USA 114:10701–10706.
6. Carroll SB, et al. (1994) Pattern formation and eyespot determination in butterfly wings. Science 265:109–114.
7. Pan-American Society for Evolutionary Developmental Biology (2017) Second biennial meeting of the Pan-American Society for Evolutionary Developmental Biology. Available at www.evodevopanam.org/uploads/4/0/3/2/40325263/2017panamsedbprogramabstracts_updated_8.18.17b.pdf. Accessed December 27, 2017.