Complex genetic patterns in the mangrove wood-borer Sphaeroma terebrans Bate, 1866 (Isopoda, Crustacea, Sphaeromatidae) generated by shoreline topography and rafting dispersal

► We investigate the genetic structure of an isopod marine species, living in mangrove ecosystems. ► High genetic diversity and very low gene flow levels have been found among very close localities. ► Phylogenetic molecular analyses reveal the existence of some cryptic species.