Reappraisal of the <i>Crangonyx floridanus</i> species complex, with the description of a new species of <i>Crangonyx</i> Bate, 1859 (Amphipoda: Crangonyctidae) from northern Florida, USA

Abstract Crangonyx apalachee n. sp. Cannizzaro &amp; Sawicki in Cannizzaro, Sisco Sawicki, is described from Lake Jackson Leon County, Florida, USA, a prairie lake that periodically drains through karst sinkholes during times of low rainfall. The new species occurs tall grass along the lake’s shoreline. Molecular analyses nuclear 18S rDNA and 28S with mitochondrial 16S rDNA, combined morphological were used to delineate population closely related crangonyctids. occurrence C. apalacheen. marks fifth be floridanus complex Florida. Collections other locations across north Florida suggest presence additional floridanus-complex still described.