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Blastodisc

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Blastodisc 

embryonic disc, an aggregate of cytoplasm in the holozoic part of the ovum in animals with discoid cleavage. The blastodisc contains a nucleus and is free from the yolk. In the process of cleavage the blastodisc is transformed into a layer of cells (blastoderm) located on the surface of the nondividing yolk.
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[FIGURE 1 OMITTED] Stage 1 (Cleavage) During this period dividing cells were easily distinguishable prior to blastodisc formation, and little change in morphometry occurs.
Embryo development and morphometry in the blue king crab Paralithodes ... by Stevens, Bradley G. / Journal of Shellfish Research
[FIGURE 9 OMITTED] The right uterus of the one gravid female observed during late September had one single ovum capsule with no visible embryos, along with several blastodisc or nutritive capsules, whereas the contents of other uterus appeared to have been aborted.
The reproductive biology of the porbeagle shark (Lamna nasus) in the ... by Jensen, Christopher F.; Natanson, Lisa J.; Pratt, Harold L., Jr.; Kohler, Nancy E.; Campana, Steven / Fishery Bulletin
 
 
 
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