Roelofs, W.L., Gieselmann, M.J., Mori, K., & Moreno, D.S. 1982 Sex pheromone chirality comparison between sibling species -- California red scale and yellow scale.. Naturwissenschaften 69: 348 pp.

Notes: Aonidiella aurantii and A. citrina occur sympatrically and are essentially indistinguishable from external morphology; they use species specific pheromone components that exhibit structural differences, but identical chirality at C-3.