99
Fig. 1.28 Extraembryonic nutrition during brooding in: ( A ) Figularia
fi gularis ; ( B ) Micropora notialis ; ( C , D ) Mollia multijuncta . ( A , B )
Part of an ovicell with embryo and adjacent distal wall of maternal
zooid ( A ), or ooecial vesicle ( B ) with placental analogue. ( C , D ) Early
embryo and fully formed larva in a terminal semicleithral ovicell with
embryophore ( C , D from Ostrovsky 2013 , courtesy of John Wiley and
Sons, http://onlinelibrary.wiley.com/doi/10.1111/evo.12039/full ).
Abbreviations: bc brood cavity, bw basal wall, cr cryptocyst, dz distal
zooid, е embryo, ес ectooecium, en entooecium, fm frontal membranous wall, la larva, m muscle strands of ooecial vesicle, mz maternal
zooid, oc ooecial coelom, ое ooecium, of ovicell fl oor, ok kenozooidal
ooecium, op operculum, p polypide, pl placental analogue (embryophore), sc sclerite of ooecial vesicle, tw transverse wall, v ooecial
vesicle. Scale bars: A , B , 20 μm; C , D , 100 μm
Fig. 1.29 Oogenesis and matrotrophic incubation in Cellaria tenuirostris . ( A ) Vitellogenic doublet in ovary. ( B ) Early embryo in endotoichal
ovicell with embryophore ( diagonal section ). Abbreviations: bc brood
cavity, е embryo, f follicle cells, m muscle strands of ooecial vesicle,
nc nurse cell, o oocyte, of ovicell fl oor, op operculum, р polypide,
pl placental analogue (embryophore). Scale bars: A , B , 10 μm
Figures
Fig. 1.28 Extraembryonic nutrition during brooding in: ( A ) Figularia
fi gularis ; ( B ) Micropora notialis ; ( C , D ) Mollia multijuncta . ( A , B )
Part of an ovicell with embryo and adjacent distal wall of maternal
zooid ( A ), or ooecial vesicle ( B ) with placental analogue. ( C , D ) Early
embryo and fully formed larva in a terminal semicleithral ovicell with
embryophore ( C , D from Ostrovsky 2013 , courtesy of John Wiley and
Sons, http://onlinelibrary.wiley.com/doi/10.1111/evo.12039/full ).
Abbreviations: bc brood cavity, bw basal wall, cr cryptocyst, dz distal
zooid, е embryo, ес ectooecium, en entooecium, fm frontal membranous wall, la larva, m muscle strands of ooecial vesicle, mz maternal
zooid, oc ooecial coelom, ое ooecium, of ovicell fl oor, ok kenozooidal
ooecium, op operculum, p polypide, pl placental analogue (embryophore), sc sclerite of ooecial vesicle, tw transverse wall, v ooecial
vesicle. Scale bars: A , B , 20 μm; C , D , 100 μm
Fig. 1.29 Oogenesis and matrotrophic incubation in Cellaria tenuirostris . ( A ) Vitellogenic doublet in ovary. ( B ) Early embryo in endotoichal
ovicell with embryophore ( diagonal section ). Abbreviations: bc brood
cavity, е embryo, f follicle cells, m muscle strands of ooecial vesicle,
nc nurse cell, o oocyte, of ovicell fl oor, op operculum, р polypide,
pl placental analogue (embryophore). Scale bars: A , B , 10 μm
Figures