Formation of the amnioserosa, an epithelium that occupies a hole in the embryonic dorsal epidermis. This occurs by the transformation of a narrow strip of cells at the dorsal midline of the blastoderm from columnar to squamous cells, accompanied by a lateral shift. [ https://www.worldcat.org/search?q=bn%3A0879694238 ]
This is just here as a test because I lose it