New County Records Demonstrating a Northern Expansion of Mansonia titillans in South Carolina, USA

ABSTRACT New county records in South Carolina suggest an expansion of the recorded northern distribution of Mansonia titillans in the USA. New location records of Ma. titillans in Beaufort County, as well as new county records in Berkeley, Clarendon, Colleton, and Georgetown counties are reported. Taxonomic notes are presented that provide 100% identification accuracy. Adult Ma. titillans were collected between August and December 2017 from 8 locations in 5 counties in South Carolina. Distribution records for floating water hyacinth (Eichhornia crassipes) and water lettuce (Pistia stratiotes), the aquatic plants normally associated with immature Ma. titillans, are documented in relation to new records of Ma. titillans adults.