Fig. 2.33 Structure of hyperstomial cleithral ovicells in: ( A ) Micropora
brevissima ; ( B ) Micropora variperforata ; ( C – E ) Micropora notialis ;
( F – H ) Micropora gracilis . ( A ) Part of non-cleaned colony with ooecia
formed by interzooidal avicularia. ( B ) Part of cleaned colony with ooecia formed by distal autozooid ( top left ) and distal kenozooid. ( C , D )
Cleaned specimens with ooecia formed by interzooidal avicularium
( C ) and distal kenozooid ( D ) ( arrow indicates communication pore of
ooecium). ( E ) Proximal edge of cleaned ooecium ( arrows indicate
medial sutures of ectooecium and entooecium). ( F ) Non-cleaned specimen
with ovicell, the ooecium of which is formed by an interzooidal avicularium. ( G ) Non-calcifi ed window ( arrowed ) on internal surface of
entooecium. ( H ) Cavity of interzooidal avicularium and ovicell fl oor
( arrow indicates communication pore of ooecium). Abbreviations: av
avicularium, cr cryptocyst, dk distal kenozooid, dz distal zooid, ес
ectooecium, en entooecium, mz maternal zooid, of ovicell fl oor. Scale
bars: A – D , F , 100 μm; E , G , 30 μm; H , 10 μm