Throughout the postnatal life of rodents, neural progenitor cells migrate from the subventricular zone (SVZ) of the forebrain through the rostral migratory system (RMS) to the olfactory bulb.

A rostral denticle of Ischyrhiza mia, a species belonging to an extinct group of sawfishes that lived in North American waters during the late Cretaceous period, around 100 to 65 million years ago.