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Fig. 1.17 Oogenesis, brooding and ovicell structure in Gregarinidra
serrata . ( A ) Empty endozooidal ovicell. ( B ) Early embryo in endozooidal ovicell; the inset shows a vitellogenic doublet in the ovary.
Abbreviations: bc brood cavity, bw basal wall, dz distal zooid, е embryo,
fe fertilization envelope, fm frontal membranous wall, m muscle strand
of ooecial vesicle, mz maternal zooid, nc nurse cell, o oocyte, ое ooecium,
of ovicell fl oor, op operculum, os oral spine, p polypide, pl placental
analogue (embryophore), s sperm in cavity of fertile zooid, sc sclerite
of ooecial vesicle, st spermatogenic tissue, tw transverse wall, v ooecial
vesicle. Scale bars: A , B , 20 μm; inset , 10 μm
Figures
Fig. 1.17 Oogenesis, brooding and ovicell structure in Gregarinidra
serrata . ( A ) Empty endozooidal ovicell. ( B ) Early embryo in endozooidal ovicell; the inset shows a vitellogenic doublet in the ovary.
Abbreviations: bc brood cavity, bw basal wall, dz distal zooid, е embryo,
fe fertilization envelope, fm frontal membranous wall, m muscle strand
of ooecial vesicle, mz maternal zooid, nc nurse cell, o oocyte, ое ooecium,
of ovicell fl oor, op operculum, os oral spine, p polypide, pl placental
analogue (embryophore), s sperm in cavity of fertile zooid, sc sclerite
of ooecial vesicle, st spermatogenic tissue, tw transverse wall, v ooecial
vesicle. Scale bars: A , B , 20 μm; inset , 10 μm
Figures