Perkinsus spp. colonies on agar plates.

A. General appearance of P. marinus colonies and lawn growing on agar plates (60 mm x 15 mm). B. Close up of square on A showing colonies and P. marinus lawn. C. General appearance of P. mediterraneus colonies after streaking the cultures on agar plates, note individual colonies (arrowheads). D. Low magnification of P. marinus colonies (arrowheads). E. Detail of P. marinus schizogony; note the daughter cells being released from the mother cell (arrowheads). F. Large P. marinus colony; note that cell division is not synchronized as indicated by the differences in cell size.