Atlantidosteus

Atlantidosteus is an extinct genus of homostiid arthrodire from the Early to Middle Devonian of Morocco and Queensland.^[1] It contains two known species, A. hollardi and A. pacifica.

Atlantidosteus Temporal range: (Emsian to Eifelian) 407.7–387.7 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Placodermi
Order:	†Arthrodira
Suborder:	†Brachythoraci
Family:	†Homostiidae
Genus:	†Atlantidosteus Lelièvre, 1984
Species
†A. hollardi (Lelièvre) 1984 †A. pacifica (Young) 2003

Description

Atlantidosteus pacifica is known from a right suborbital plate, found in the Broken River Group of Queensland, Australia.^[1]

Phylogeny

Atlantidosteus is part of the clade Migmatocephala, closer related to Homostius, than Antineosteus.

	Tityosteus
	Antineosteus Atlantidosteus Homostius

The cladogram shown here is based on Young, 2003^[1]