Schizocoely (adjective forms: schizocoelous or schizocoelic) is a process by which some animal
embryos develop. The schizocoely mechanism occurs when secondary body cavities (
coeloms) are formed by splitting a solid mass of
mesodermal embryonic tissue.[1][2] All schizocoelomates are protostomians and they show holoblastic, spiral, determinate cleavage.
Etymology
The term schizocoely derives from the
Ancient Greek words σχίζω (skhízō), meaning 'to split', and κοιλία (koilía), meaning 'cavity'.[3][4] This refers to the fact that fluid-filled body cavities are formed by splitting of mesodermal cells.
Taxonomic distribution
Animals called
protostomes develop through schizocoely for which they are also known as schizocoelomates.
The term refers to the order of organization of cells in the
gastrula leading to development of the
coelom. In mollusks, annelids, and arthropods, the
mesoderm (the middle
germ layer) forms as a solid mass of migrated cells from the single layer of the gastrula. The new mesoderm then splits, creating the pocket-like cavity of the coelom.
^Technau, Ulrich; Scholz, Corinna B. (2003). "Origin and evolution of endoderm and mesoderm". The International Journal of Developmental Biology. 47 (7–8): 531–539.
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^Satoh, Gouki; Harada, Yoshito; Satoh, Nori (September 2000). "The expression of nonchordate deuterostome Brachyury genes in the ascidian Ciona embryo can promote the differentiation of extra notochord cells". Mechanisms of Development. 96 (2): 155–163.
doi:
10.1016/S0925-4773(00)00395-6.
PMID10960780.
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^Kaul-Strehlow, Sabrina; Stach, Thomas (2011-05-11). "The pericardium in the deuterostome Saccoglossus kowalevskii (Enteropneusta) develops from the ectoderm via schizocoely". Zoomorphology. 130 (2): 107.
doi:
10.1007/s00435-011-0125-0.
ISSN1432-234X.
S2CID22199440.