Calycomyza promissaCalycomyza promissa is a species of fly in the family Agromyzidae.DistributionCanada, United States.HostsSymphyotrichum ascendens, Symphyotrichum chilense, Symphyotrichum drummondii, Symphyotrichum ericoides, Symphyotrichum lateriflorum, Symphyotrichum oolentangiense, Symphyotrichum pilosum, Symphyotrichum praealtum, Symphyotrichum puniceum.