Below Preservation of Burgess Shale trilobites is
exceptional, as some of these are entire animals
rather than Just shed body casings Naraola is an
early and unusual trilobite, with front and rear
sections to the carapace and one central furrow from
head to tall. Comparison of specimens shows that
Naraoia may have retained immature features into
mature adulthood, a phenomenon known as neoteny.