Concise hierarchy

(Kingdom) Animalia - (Phylum) Chordata - (Class) Placodermi - (Order) Phlyctaeniiformes

Current position

†Aspinothoracidi ([unranked]) Stensiö, 1959

Ref: R. van der Laan, 2018: 32; Boyle & Ryan, 2017: fig. 17.

Alternative positions

†Arthrodira (Order) Woodward, 1891	Ref: R.L. Carroll, 1988: 597.
†Arthrothoraci (Order)	Ref: D.S. Jordan, 1923: 89.
†Aspinothoracida ([unranked])	Ref: J. Boyle & M.J. Ryan, 2017: fig. 17. [implicit]
†Coccosteomorphi ([unranked]) Stensiö, 1944	Ref: J.S. Nelson et al., 2016: 40. [implicit]

Historical positions

†Aspinothoracidi ([unranked]) Stensiö, 1959	Ref: R. van der Laan, 2018: 32.
†mylostomatids? (Family) Woodward, 1891	Ref: J. Boyle & M.J. Ryan, 2017: 319, fig. 17.
†coccosteomorphs ([unranked]) Stensiö, 1944	Ref: J.S. Nelson et al., 2016: 40.
†Aspinothoracidi ([unranked]) Stensiö, 1959	Ref: R.K. Carr & W.J. Hlavin, 2010: 212, 215.
†Arthrodiriformes (Order) Grande & Eastman, 1986	Ref: J.S. Nelson, 2006: 39. [rough position]
†Arthrodira (Order) Woodward, 1891	Ref: R.L. Carroll, 1988: 597.
†Arthrothoraci (Order)	Ref: D.S. Jordan, 1923: 89.

Number of Subtaxa

2025

Available in Systema Naturae 2000

†1g