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Ovule before the formation of the second polar body

Ovule before the formation of the second polar body
Ovule before the formation of the second polar body
Normally released eggs of this species already finished the meiotic process. However, after spawning it is possible to find ovules that did not expelled the second polar body and the germinal vesicle is still visible.
Normally released eggs of this species already finished the meiotic process. However, after spawning it is possible to find ovules that did not expelled the second polar body and the germinal vesicle is still visible.
Bruno C. Vellutini
Size
Taxa: Clypeaster subdepressus
Experts: Bruno C. Vellutini
Date: Jan. 10, 2007, 11:57 p.m.
Place: CEBIMar, São Sebastião, SP, Brazil
Geolocation: S 23°49'39" W 45°25'21"
Bruno C. Vellutini. Ovule before the formation of the second polar body. Cifonauta image database. Available at: http://cifonauta.cebimar.usp.br/media/8521/ Accessed: 2020-02-19.
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1426 images

References

2010 Vellutini BC, Migotto AE. Embryonic, larval, and juvenile development of the sea biscuit Clypeaster subdepressus (Echinodermata: Clypeasteroida). PLoS ONE, 5(3): e9654, doi:10.1371/journal.pone.0009654, pmid:20339592, url:http://www.ncbi.nlm.nih.gov/pubmed/20339592