taxon constraint for UBERON:0004880 chordamesoderm and UBERON:0002328 notochord

[ANiknejad]

Hi Chris,

related to issue #574 it sounds like
UBERON:0004880 chordamesoderm
and
UBERON:0002328 notochord
both with relationship
relationship: only_in_taxon NCBITaxon:7711 ! Chordata

are too much restrictive,

'Our study of annelid development reveals a population of mesodermal cells that converge and extend along the ventral midline and express a combination of transcription factors, signaling molecules, and guidance factors that closely matches that of the vertebrate chordamesoderm.'
https://www.ncbi.nlm.nih.gov/pubmed/25214631

I understand here that the vertebrate chordamesoderm arises from this annelid mesodermal cell population, right?
Also see
https://evodevojournal.biomedcentral.com/articles/10.1186/s13227-015-0025-3
where the hypothesis of axochord-notochord homology is reported.

So the annotations here would report for earch organ an origin from a common ancestral structure present in the ancestor of the Bilaterian.

[gouttegd]

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