Molecular and morphological analyses reveal a new hypogean species of amphipod in the genus <i>Crangonyx</i> Bate, 1859 (Crustacea: Crangonyctidae) within the <i>floridanus</i> species complex, from Suwannee County, Florida

Crangonyx stinei sp. n. is described from Peacock Springs Cave, in Wes Skiles Peacock Springs State Park, Suwannee County, Florida. Crangonyx stinei sp. n. was collected from the cave benthos via SCUBA cave diving techniques. Molecular analyses of the nuclear 18S and 28S rDNA and mitochondrial 16S rDNA reveal significant phylogenetic differences between C. stinei sp. n. and closely related Crangonyx spp. Crangonyx stinei sp. n. is the sixth member of the floridanus species complex in the State of Florida, but only the second to be described from a hypogean habitat. To determine the biogeographic range of C. stinei sp. n., additional collecting in both epigean and hypogean systems is needed. http://www.zoobank.org/urn:lsid:zoobank.org:pub:39692E06-EBAA-492B-91FD-20EBB5D5C242