Phlyctaeniidae
Phlyctaeniidae is an extinct family of placoderm arthrodire fishes that lived during the Devonian period, mainly in Norway and North America. Classification
Order Arthrodira Woodward, 1891
 Phlyctaenioidei Miles, 1973
 Brachythoraci Gross, 1932 - (includes the well-known Dunkleosteus, Dinichthys, etc.) Williamsaspididae White, 1952
 Groenlandaspididae Obruchev, 1964
 Arctolepididae Heintz, 1937
 Phlyctaeniidae Fowler, 1947
 Aggeraspis Gross, 1962
 Arctaspis Heintz, 1929
 Arctolepis? Eastman, 1908 - (may instead belong to Arctolepididae)
 Barwickosteus Young & Long, 2014
 Cartieraspis Pageau, 1969
 Diadsomaspis Gross, 1937
 Dicksonosteus? Goujet, 1975 - (may not belong to Phlyctaeniidae)
 Elegantaspis Heintz, 1929 - (may instead belong to trilobite genus Kazakhius)
 Gaspeaspis Pageau, 1969
 Grifftaylor Young & Long, 2014
 Heintzosteus? Goujet, 1984 - (may instead belong to Arctolepididae)
 Heterogaspis Strand, 1932
 Huginaspis Heintz, 1929
 Kolpaspis Pageau, 1969
 Kueichowlepis Pan & Wang, 1975
 Lyhoalepis Janvier, Tông-Dzuy & Doàn Nhât, 1994
 Neophlyctaenius White, 1969
 Pageauaspis Denison, 1978
 Phlyctaenius Traquair, 1890
 Prosphymaspis Gross, 1937
 Stipatosteus Plax & Newman, 2020

Phylogeny
Phlyctaeniidae's placement within Arthrodira can be shown in the cladogram below:

References

 
Placoderm families