amphiblastula


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amphiblastula

(ˌæmfɪˈblæstjʊlə)
n
(Animals) the free-swimming larva of certain sponges, which consists of a hollow spherical mass of cells some of which have flagella
References in periodicals archive ?
Electron microscopy study of the sponge Oscarella lobularis and its amphiblastula larvae.
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.
An amphiblastula or coeloblastula is produced by calcareous sponges; a parenchymella is the larva of the majority of demosponges, but several other larval types are known; and a trichimella is exclusive to hexactinellid sponges.