176
Fig. 2.18 Early ovicellogenesis in: ( A – D ) Callopora lineata . ( E , F )
Tegella armifera (critical-point-dried non-cleaned specimens). ( A , B )
Earliest stage of ovicell-fl oor calcifi cation in the form of a bilobate plate
(a small area of cryptocyst can be seen to the left of the ooecial primordium in B ). ( C ) Calcifi cation of ovicell fl oor (initial part of entooecium
arrowed ). ( D – F ) Formation of ooecial fold ( arrowed in F ) (( A , C , D ) –
From Ostrovsky and Schäfer 2003 , courtesy of John Wiley and Sons,
http://onlinelibrary.wiley.com/doi/10.1046/j.1463-6395.2003.00121.x/
abstract ; ( B , E ) – From Ostrovsky et al. 2003 , courtesy of Elsevier, http://
www.sciencedirect.com/science/article/pii/S0044523104701047 ).
Abbreviations: cr cryptocyst, db bud of distal zooid, fo ooecial fold, mz
maternal zooid; of ovicell fl oor, op operculum, os oral spine. Scale bars:
A – F , 100 μm
2 Cheilostome Brood Chambers: Structure, Formation, Evolution
Fig. 2.18 Early ovicellogenesis in: ( A – D ) Callopora lineata . ( E , F )
Tegella armifera (critical-point-dried non-cleaned specimens). ( A , B )
Earliest stage of ovicell-fl oor calcifi cation in the form of a bilobate plate
(a small area of cryptocyst can be seen to the left of the ooecial primordium in B ). ( C ) Calcifi cation of ovicell fl oor (initial part of entooecium
arrowed ). ( D – F ) Formation of ooecial fold ( arrowed in F ) (( A , C , D ) –
From Ostrovsky and Schäfer 2003 , courtesy of John Wiley and Sons,
http://onlinelibrary.wiley.com/doi/10.1046/j.1463-6395.2003.00121.x/
abstract ; ( B , E ) – From Ostrovsky et al. 2003 , courtesy of Elsevier, http://
www.sciencedirect.com/science/article/pii/S0044523104701047 ).
Abbreviations: cr cryptocyst, db bud of distal zooid, fo ooecial fold, mz
maternal zooid; of ovicell fl oor, op operculum, os oral spine. Scale bars:
A – F , 100 μm
2 Cheilostome Brood Chambers: Structure, Formation, Evolution