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: