168
Fig. 2.10 Damaged spinose ooecium in Unidistelopora krauseae
( A , B ) and complete bilobate ooecium in Gilbertopora larwoodi ( C – F ).
( A ), Maternal autozooid with a damaged ovicell ( arrowed ) and an intramural bud; ( B ), ooecial spine bases arranged in a horseshoe pattern
(medial spines adjacent to the mural rim). ( C ), Complete ooecium of
two large fl attened spines viewed from above; ( D ), the same ooecium
viewed from the side, showing a lateral foramen; ( E ), the same ooecium in
proximal view showing the main opening of the ovicell; ( F ), the same
ooecium showing a distal opening (distal view) (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 autozooid, of ovicell
fl oor, оs oral spine. Scale bars: A , 130 μm; B , 43.5 μm; C , 34.5 μm; D ,
31.3 μm; E , 23.3 μm; F , 26.3 μm
2 Cheilostome Brood Chambers: Structure, Formation, Evolution
Fig. 2.10 Damaged spinose ooecium in Unidistelopora krauseae
( A , B ) and complete bilobate ooecium in Gilbertopora larwoodi ( C – F ).
( A ), Maternal autozooid with a damaged ovicell ( arrowed ) and an intramural bud; ( B ), ooecial spine bases arranged in a horseshoe pattern
(medial spines adjacent to the mural rim). ( C ), Complete ooecium of
two large fl attened spines viewed from above; ( D ), the same ooecium
viewed from the side, showing a lateral foramen; ( E ), the same ooecium in
proximal view showing the main opening of the ovicell; ( F ), the same
ooecium showing a distal opening (distal view) (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 autozooid, of ovicell
fl oor, оs oral spine. Scale bars: A , 130 μm; B , 43.5 μm; C , 34.5 μm; D ,
31.3 μm; E , 23.3 μm; F , 26.3 μm
2 Cheilostome Brood Chambers: Structure, Formation, Evolution