A similar arrangement also occurs in mollusk (23) and brachiopod larvae (24), and
ventral midline muscles are observed in most lophotrochozoan phyla (table S3), suggesting that an axochord is ancestral for lophotrochozoa.
Not exact matches
S9) revealed that, after elongation, the Platynereis mesodermal
midline cells differentiate into the previously described «medial
ventral longitudinal
muscle» (13)(Fig. 3A).
(E) Transmission electron micrograph showing axochordal cells,
ventral oblique
muscles, neuronal
midline (nm), and the neuropil (np).