Reference: Borges, P. A. V., Rodrigues, A. S. B., Silva, S. E., Seabra, S. G., Paulo, O. S., & Quartau, J. A. (2018). New data on polymorphism of the meadow spittlebug Philaenus spumarius (L.) (Hemiptera: Aphrophoridae) from the island of São Miguel (Azores). Zootaxa, 4369(1).
