Uberon definition : The middle germ layer of the embryo, between the endoderm and ectoderm.;
Uberon related term : embryonic mesoderm; mesodermal mantle; entire mesoderm;
Uberon Homology note : The Bilateria are triploblastic (with true endoderm, mesoderm, and ectoderm) (...).[well
established][VHOG];
Uberon Taxon note : sponges do not seem to have a mesoderm and accordingly Amphimedon lacks transcription
factors involved in mesoderm development (Fkh, Gsc, Twist, Snail)[http://www.nature.com/nature/journal/v466/n7307/full/nature09201.html].
Mesoderm may not be homologous across verteberates;