Contents -- Preface - freshwater decapod biology in the 21st Century -- Freshwater crab systematics and biogeography: the legacy of Richard Bott (*1902-†1974) -- Life span, early life stage protection, mortality, and senescence in freshwater Decapoda -- Freshwater decapod conservation: recent progress and future challenges -- An overview of the Afrotropical freshwater crab fauna: diversity, biogeography, and conservation (Brachyura, Potamoidea, Potamonautidae and Potamidae) -- Morphological and molecular characterization of a new species of Fredius (Decapoda, Pseudothelphusidae) from Rondônia, southern Amazonia, Brazil -- Description of a new freshwater crab species of the genus Potamon (Decapoda, Brachyura, Potamidae) from Iran, based on morphological and genetic characters -- A new species of Isolapotamon Bott, 1968 (Decapoda, Brachyura, Potamidae) from Mindanao, with notes on the Philippine Isolapotamon species -- New occurrence of Miocene freshwater crabs (Brachyura, Potamidae) in the North Alpine Foreland Basin, Germany, with a note on fossil Potamon to calibrate molecular clocks -- Differentiation within a river system: ecology or geography driven? Evolutionary signi cant units and new species in Jamaican freshwater crabs -- The Aeglidae of Uruguay (Decapoda, Anomura), with the description of a new species of Aegla -- Atyid shrimps of Hainan Island, southern China, with the description of a new species of Caridina (Crustacea, Decapoda, Atyidae) -- On the presumed phylogenetic position of the Xiphocarididae (Decapoda, Caridea) based on the larval morphology of Xiphocaris elongata -- Diversity and distribution of Australian freshwater cray sh with a check-list of the world Parastacidae and a key to the genera (Decapoda, Astacidea, Parastacoidea) -- The freshwater cray sh fauna of Australia: update on conservation status and threats.