|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|M. Zhu et al. 2016||A jawed stem gnathostome possessing maxilla, premaxilla and dentary together with elements formerly regarded as diagnostic of placoderms, including a nuchal plate and median dorsal plates. Differs from Entelognathus (2) by having a dentary with both palatal and facial laminae, no infradentaries or gular plates, two pairs of postorbital plates, paired central plates, long rostral and premedian plates, ventral nostrils, paired grooves leading to nasal openings on the ventral face of the dermal rostrum, a ventral mouth, an opercular with a ventral lamina, ginglymoid dermal neck joint, three median dorsal plates, posterior ventrolateral plates of both sides in contact, small eye capsules that are not sutured to surrounding bones, and tubercular ornament.|