Light and electron microscopical description of Ceratomyxa labracis n. sp. and a redescription of C. diplodae (Myxosporea: Bivalvulida) from wild and cultured Mediterranean sea bass Dicentrarchus labrax (L.) (Teleostei: Serranidae) - Sitjà-Bobadilla, A.; Alvarez-Pellitero, P. (Systematic Parasitology, 1993)