Term Name:	amnioserosa formation
Synonyms:
Definition:	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.
Ontology:	GO: Biological Process [GO:0007378]    QuickGO    AmiGO