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Fig. 1.32 Matrotrophic incubation in Cribricellina cribraria . ( A ) Early
embryo in ovicell with undeveloped embryophore ( sagittal section ).
( B ) Early embryo in ovicell with placental analogue (entrance to brood
cavity arrowed ). ( C ) Fragment of late embryo and placental analogue.
Abbreviations: bc brood cavity, е embryo, fs funicular strands, mz
maternal zooid, oc ooecial coelom, ое ooecium, ok kenozooidal ooecium,
op operculum, pl placental analogue (embryophore), tw transverse wall,
v ooecial vesicle. Scale bars: A , 50 μm; B , 40 μm; C , 20 μm
Figures