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Fig. 2.56 Ooecial structure in: ( A , B , D ) Stichomicropora baccata ;
( C ) Stichomicropora ostrovskyi . ( A – C ) General view of costate ooecium
(lateral foramina arrowed ). ( D ) Fractured ooecium showing a row of
spine bases and ovicell fl oor ( arrowheads indicate cryptocystal matrix
encroaching on the ovicell spine bases and the base of a tiny oral spine)
(From Ostrovsky and Taylor 2005a , courtesy of John Wiley and Sons,
http://onlinelibrary.wiley.com/doi/10.1111/j.1096-3642.2005.00179.x/
abstract ). Abbreviations: dz distal autozooid, mz maternal zooid, of
ovicell fl oor. Scale bars: A , B , 100 μm; C , 76.9 μm; D , 66.7 μm
2 Cheilostome Brood Chambers: Structure, Formation, Evolution