Phlyctaenius

{{Short description|Genus of placoderm fishes}}

{{More citations needed|date=June 2008}}

{{Automatic taxobox

| fossil_range = {{fossilrange|Early Devonian|Middle Devonian}}

| image = Skull roof of Phlyctaenius acadius.png

| image_caption = Skull roof of P. acadius (specimen RSM GY 1897.51.129)

| taxon = Phlyctaenius

| authority = Traquair, 1890

| subdivision_ranks = Species

| subdivision =

• {{extinct}}P. acadius Traquair, 1890
• {{extinct}}P. australis Murray
• {{extinct}}P. atholi Pageau, 1969
• {{extinct}}P. stenosus Young, 1983

| synonyms =

• Phlyctaenium Zittel, 1879 (preoccupied)

}}

Phlyctaenius is an extinct genus of placoderm fish, which lived during the Devonian period of New Brunswick, Canada.{{Cite journal|last=Young|first=V. T.|date=1985|title=Taxonomy of the arthrodire Phlyctaenius from the Lower or Middle Devonian of Campbellton, New Brunswick, Canada

|journal=Bulletin of the Natural History Museum, Geology Series|url=https://www.biodiversitylibrary.org/page/2358814#page/1/mode/1up|language=en|volume=37 |pages=1–35}} It was named by Traquair (1890){{Cite journal |last=Traquair |first=R. H. |date=1890 |title=Note on Phlyctænius, a New Genus of Coccosteidæ |journal=Geological Magazine |volume=7 |issue=3 |pages=144 |doi=10.1017/s0016756800190053 |issn=0016-7568|doi-access=free |bibcode=1890GeoM....7..144T }}Traquair, R. H. (1890a). Notes on the Devonian fishes of Seumenac Bay and Campbelltown in Canada. Geol. Mag., London. 7: 15-22. as a replacement for Phlyctaenium Zittel (1879), which was preoccupied.Zittel, K. von. (1879)

One species, P. anglicus, was known from remains found in England and Wales and was initially described by Traquair (1890). It was moved to Heightingtonaspis when the genus was described by White (1969).White, E.I. (1969). The deepest vertebrate fossil and other arctolepid fishes. Biological Journal of the Linnean Society 1(3): 293-310