Heterosteidae

Heterosteidae; Temporal range: Emsian to Givetian
	Comparison of genera
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Placodermi
Order:	Arthrodira
Suborder:	Brachythoraci
Family:	Heterosteidae; Jaekel, 1903
Genera
	Herasmius; Heterosteus; Yinostius;

Heterosteidae is an extinct family of moderately large to giant, flattened, benthic arthrodire placoderms with distinctive, flattened, triangular skulls that are extremely broad posteriorly, but become very narrow anteriorly.^[1]

Genera

Herasmius

Heterosteus

Yinostius

References

^ Denison, Robert (1978). Placodermi Volume 2 of Handbook of Paleoichthyology. Stuttgart New York: Gustav Fischer Verlag. p. 65. ISBN 978-0-89574-027-4.

[Denison1-1] Denison, Robert (1978). Placodermi Volume 2 of Handbook of Paleoichthyology. Stuttgart New York: Gustav Fischer Verlag. p. 65. ISBN 978-0-89574-027-4.

[1]