Contractile mesodermal midline cells in the ventral midline of annelid embryos that give rise to the axochord. [ https://orcid.org/0000-0003-3308-6245 http://www.ncbi.nlm.nih.gov/pubmed/25214631 https://github.com/obophenotype/uberon/issues/574 ]

Synonyms: axochord pre-muscle mass

This is just here as a test because I lose it