Rivulogammarus semiarmatus Karaman S. & G.S, 1959 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Arthropoda class Malacostraca order Amphipoda family Gammaridae genus Gammarus species Gammarus roeselii Name Homonyms Rivulogammarus semiarmatus Karaman S. & G.S, 1959