Article Title: | An invader along with an invader: An unusual record of a zebra mussel Dreissena polymorpha (Pallas, 1771) (Bivalvia) living phoretically on a killer shrimp Dikerogammarus villosus (Sowinsky, 1894) (Amphipoda) |
Keywords: | Dikerogammarus villosus, Dreissena polymorpha, Ponto-Caspian invaders, phoresis, vectors of spread, Bulgarian inland waters |