amphiblastula


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amphiblastula

[¦am·fə¦blas·chə·lə]
(embryology)
A blastula resulting from amphiblastic cleavage.
(invertebrate zoology)
The free-swimming flagellated larva of many sponges.
References in periodicals archive ?
There are striking differences in the details of early embryology; the formation of an amphiblastula larva by inversion, or the proliferation of blastomeres into a follicle enclosed bag of nurse cells in a viviparous sponge embryo are radically different from typical animal gastrulation.
In the amphiblastula larvae of Calcarea, the flagellate cells of the anterior pole make the initial contact with the substratum (Bergquist and Green, 1977).
In the amphiblastula larvae of calcareous sponges, flagellated cells shed and discard their excised flagella (Amano and Hori, 1993).