ANiknejad
commented
6 years ago Annotation DONE at least for 'mesoderm':
UBERON:0000926 mesoderm
33213 Bilateria
ECO:0000355 phylogenetic distribution evidence
CIO:0000004 Medium confidence assertion
Even if it is referred to 'bilaterian mesoderm', there are still controversy, see this link here, (Neural Crest Workshop Notes February 22, 2012, from http://www.phenotypercn.org/, Phenotype Ontology Research Coordination Network (RCN))
https://docs.google.com/document/d/1-4QZnWGIBZBKLsOccd6mcB44BREv5bhHamCBVWnQAQ4/edit
"mesoderm evolved more than once", said Terry Hayamizu
here the paper's record for later annotating ...(how actually?...)
https://www.ncbi.nlm.nih.gov/pubmed/?term=29185520
Gut-like ectodermal tissue in a sea anemone challenges germ layer homology.
"Currently, cnidarian endoderm (that is, 'mesendoderm') is considered homologous to both bilaterian endoderm and mesoderm....our data supports an alternative model of germ layer homologies, where cnidarian pharyngeal ectoderm corresponds to bilaterian endoderm, and the cnidarian endoderm is homologous to bilaterian mesoderm."
(see also https://github.com/obophenotype/uberon/issues/578)
Comments on this paper:
https://phys.org/news/2017-09-evolutionary-gut.html
"The results completely change the way we think of the origin of germ layers. It means that 'endoderm' in sea anemones and vertebrates, although they are called the same, are actually not evolutionary related" adds Ulrich Technau.