Expression and function of spineless orthologs correlate with distal deuterocerebral appendage morphology across Arthropoda. Setton, E.V.W., March, L.W., Nolan, E.D., Jones, T.E., Cho, H., Wheeler, W.C., Extavour, C.G. and Sharma, P.P.. Developmental Biology, 430(1): 224-236 (2017)