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Temporal range: Middle Devonian
Angarichthys hyperboreus.JPG
Artist's reconstruction
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Placodermi
Order: Arthrodira
Family: Homostiidae
Genus: Angarichthys
Species: A. hyperboreus
Binomial name
Angarichthys hyperboreus
Obruchev 1927

Angarichthys hyperboreus is an extinct homostiid arthrodire placoderm from the Middle Devonian (either upper Eifelian or lower Givetian) of Siberia.[1] It is known from an infragnathal plate, an intero-lateral plate, and a marginal plate found from the Middle Devonian strata of the Tynep Series formation, near the Bakhta River. A. hyperboreus differs from Homosteus in that the former's marginal plate has a ridge where the central plate would have overlapped it,[1] and in the infragnathal, which is curved sigmoidally, and bears at least seven tooth-like prongs nearer to the functional anterior end (the plate, which is fragmentary, suggests that the intact plate would have born several more).[1]

The living animal would have been fairly large, as the head shield is estimated to be at least 40 centimeters long.[1]


  1. ^ a b c d Denison, Robert (1978). Placodermi Volume 2 of Handbook of Paleoichthyology'. Stuttgart New York: Gustav Fischer Verlag. p. 70. ISBN 978-0-89574-027-4.