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Fig. 2.14 Morphology of hyperstomial ovicells and ooecial structure
in: ( A , F ) Tegella armifera ; ( B , C ) Tegella unicornis ; ( D ) Callopora
dumerilii ; ( E ) Corbulella maderensis . ( A ) Non-cleaned air-dried
ovicell (frontal view). ( B ) Non-cleaned critical-point-dried young
ovicell with opening closed by ooecial vesicle (frontal view).
( C ) Non-cleaned mature ovicell with a prominent “collar” around the
membranous window (lateral view). ( D ) Non-cleaned ovicell with
partially detached membranous part of ectooecium (laterofrontal view).
( E ) Ooecium formed by bud of distal zooid (distal view). ( F ) Cleaned
fractured ooecium showing the main elements of the brooding capsule
(lateral view) (From Ostrovsky et al. 2009a , courtesy of Springer Verlag,
http://link.springer.com/article/10.1007/s00435-008-0070-8 ).
Abbreviations: av avicularium, bc brood cavity, bw basal wall, cr cryptocyst,
db bud of distal zooid, dz distal autozooid, ес ectooecium, en entooecium,
mz maternal autozooid, oе ooecium, of ovicell fl oor, op operculum, os oral
spine, tw transverse wall, v ooecial vesicle. Scale bars: A – F , 100 μm
2 Cheilostome Brood Chambers: Structure, Formation, Evolution
Fig. 2.14 Morphology of hyperstomial ovicells and ooecial structure
in: ( A , F ) Tegella armifera ; ( B , C ) Tegella unicornis ; ( D ) Callopora
dumerilii ; ( E ) Corbulella maderensis . ( A ) Non-cleaned air-dried
ovicell (frontal view). ( B ) Non-cleaned critical-point-dried young
ovicell with opening closed by ooecial vesicle (frontal view).
( C ) Non-cleaned mature ovicell with a prominent “collar” around the
membranous window (lateral view). ( D ) Non-cleaned ovicell with
partially detached membranous part of ectooecium (laterofrontal view).
( E ) Ooecium formed by bud of distal zooid (distal view). ( F ) Cleaned
fractured ooecium showing the main elements of the brooding capsule
(lateral view) (From Ostrovsky et al. 2009a , courtesy of Springer Verlag,
http://link.springer.com/article/10.1007/s00435-008-0070-8 ).
Abbreviations: av avicularium, bc brood cavity, bw basal wall, cr cryptocyst,
db bud of distal zooid, dz distal autozooid, ес ectooecium, en entooecium,
mz maternal autozooid, oе ooecium, of ovicell fl oor, op operculum, os oral
spine, tw transverse wall, v ooecial vesicle. Scale bars: A – F , 100 μm
2 Cheilostome Brood Chambers: Structure, Formation, Evolution