Yes, according to Osaka Metropolitan University researchers, who found that suppression of Pcdh8 is essential for the notochord to elongate properly in zebrafish. Graduate School of Medicine Dr.

The coelacanth has gills similar to those of fish living at the depths in which ... In most creatures with backbones, vertebrae replace the notochord in the embryonic stage of development.

In Panderichthids (rhipidistian fish ancestors of amphibians), 2 sets of ossifications are present in the centra region. At posterior end, below the neural arch, are pleurocentra. This element gave ...