Structural analysis
"Romundina" is commonly characterized as being in the middle of the Placoderm grade. Much of the structural analysis of "Romundina" reinforces the hypothesis that Placoderms are a grade rather than a clade as they share characteristics of both crown Cyclostomes and crown Gnathostomes. Structural analysis of the possible tooth like structures tends to place "Romundina" close to crown Gnathostomes while looking at most of the skull and body structures place "Romundina" centrally among the Placoderm grade. The location of the nasal capsule on the skull is the most widely agreed upon and definitive feature that is shared among all "Romundina" stellina specimens yet has variations among the Placoderm grade as a whole and hence is used most often to place "Romundina" among other Placoderms. The following phylogenetic tree classifies "Romundina" similar to how they were classified in Dupret et. Al (2014) published in Nature.