nStatoblast(Zoöl) One of a peculiar kind of internal buds, or germs, produced in the interior of certain Bryozoa and sponges, especially in the fresh-water species; -- also called winter buds.☞ They are protected by a firm covering, and are usually destined to perpetuate the species during the winter season. They burst open and develop in the spring. In some fresh-water sponges they serve to preserve the species during the dry season. See Illust. under Phylactolæmata.
Century Dictionary and Cyclopedia
nstatoblastOne of the peculiar internal asexual buds developed in the body-cavity of the fresh-water or phylactolæmatous polyzoans, comparable to the gemmules of the fresh-water sponges, and serving for reproduction. These germs of new individuals to be reproduced agamogenetically by internal gemmation are formed in the funiculus or mesentery of the polyzoan; on the death of the parent organism, they are ruptured, and give exit to a young animal essentially like the parent. The fact that statoblasts contain no germinal vesicle, and never exhibit the phenomena of segmentation or yolk-cleavage, is conclusive against their being ova or eggs; and, moreover, an ovary producing ova occurs elsewhere in the same individual that produces statoblasts. Also called winter bud. See cut under Plumatella.
Webster's Revised Unabridged Dictionary
Gr. stato`s standing (i. e., remaining) + -blast,
All the phylactolaemata produce, within their zooecia, the bodies known as statoblasts.
"Freshwater Sponges, Hydroids & Polyzoa" by Nelson Annandale