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On a Peculiar Mode of Germ‐Layer Formation
Author(s) -
Nørrevang Arne
Publication year - 1973
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/j.1463-6395.1973.tb00443.x
Subject(s) - inner core , biology , anatomy , layer (electronics) , basement membrane , body cavity , materials science , nanotechnology , composite material
In some planulae of the alcyonarian Gersemia rubiformis an interior structure was found in the entodermal cavity. It consisted of two layers separated by a basement membrane, the inner layer facing a central cavity. The outer layer was structurally identical with the inner “entomesoderm” of the body wall, while the inner layer of the “ball” was provided with numerous cilia and a brushborder. The development of the interior structure is described as appearing from the structural findings in different planulae. This development is very different from any other developmental process described so far.