The SSE Council invites proposals for two SSE-sponsored symposia to be held in conjunction with the 2019 annual meeting in Providence, RI. The Council considers the novelty of the topic and likely interest among its members. We encourage proposals from sub-fields or taxonomic groups that have been underrepresented in past symposia. Please note: The SSE Council considers the diversity of participants as an important criterion for symposium selection. Proposals are due July 15, 2018. Learn more about the selection process and how to submit your proposal here [1].