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Fig. 2.63 Schematic hypothetical sequence of ooecium evolution in
Microporidae illustrated by Recent species (from top to bottom ): ( A )
Micropora gracilis ; ( B ) Opaeophora lepida ; ( C ) Opaeophora monopia ;
( D ) Micropora notialis . Calcifi ed walls and zooidal opercula shown
black , membranous walls red
Figures