84
Fig. 1.12 Structure of the ovary and stages of oogenesis in: ( A )
Scrupocellaria scabra ; ( B , D ) Steginoporella perplexa ; ( C )
Nematofl ustra fl agellata . ( A ) Bud of developing zooid with early
female cells ( arrowed ). ( B ) Previtellogenic doublets in ovary. ( C )
Vitellogenic and early previtellogenic doublets in ovary (numerous
cells of intraovarian zone are clearly visible). ( D ) Mature oocyte partly
surrounding the ovary. Abbreviations: f follicle cells, is intraovarian
space, o oocyte, ov ovary-wall cells, pd previtellogenic doublet, poc
previtellogenic oocyte, sf squamous follicle cells, voc vitellogenic
oocyte. Scale bars: A – C , 20 μm; D , 30 μm
1 Reproductive Patterns of Gymnolaemate Bryozoa: General Overview and Comparative Analysis
Fig. 1.12 Structure of the ovary and stages of oogenesis in: ( A )
Scrupocellaria scabra ; ( B , D ) Steginoporella perplexa ; ( C )
Nematofl ustra fl agellata . ( A ) Bud of developing zooid with early
female cells ( arrowed ). ( B ) Previtellogenic doublets in ovary. ( C )
Vitellogenic and early previtellogenic doublets in ovary (numerous
cells of intraovarian zone are clearly visible). ( D ) Mature oocyte partly
surrounding the ovary. Abbreviations: f follicle cells, is intraovarian
space, o oocyte, ov ovary-wall cells, pd previtellogenic doublet, poc
previtellogenic oocyte, sf squamous follicle cells, voc vitellogenic
oocyte. Scale bars: A – C , 20 μm; D , 30 μm
1 Reproductive Patterns of Gymnolaemate Bryozoa: General Overview and Comparative Analysis