Chloromyxum riorajum Azevedo, Casal, García, Matos, Teles-Grilo and Matos, 2009 from the gall bladder of the Rio skate, Rioraja agassizii (Müller and Henle) (Arhynchobatidae, Rajiformes); scanning electron micrographs. (A) Mature myxospore, sutural view; (B) Mature myxospore, valvular view; (C) Detail of the caudal bundle of filaments; (D) Detail of the anterior apex showing the mild depression area for polar filaments extrusion. Scale bars: A, B = 2 μm; C, D = 1 μm.