Phymosteus

Phymosteus; Temporal range: Early Famennian[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Subphylum:	Vertebrata
Class:	Placodermi
Order:	Arthrodira
Suborder:	Brachythoraci
Infraorder:	Coccosteina
Superfamily:	Dinichthyloidea
Family:	Selenosteidae
Genus:	Phymosteus
Species:	P. liui
Binomial name
	Phymosteus liui; Wang, and Zhu

Phymosteus liui is an extinct large selenosteid arthrodire placoderm known from the Lower Famennian Xiejingshi Formation of Shimen County, Hunan province, in central China.[1]

The holotype and only known specimen of P. liui is a V-shaped median dorsal plate with a distinctive texture.[1] Because the fossil is incomplete, its exact relationship to the other selenosteids can not be satisfactorily determined.

References

Wang, Junqing, and Min Zhu. "A new eubrachythoracid arthrodire from the upper devonian of Hunan China." Vertebrata Pal Asiatica 42.2 (2003): 154-161.

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[WanZhu-1] Wang, Junqing, and Min Zhu. "A new eubrachythoracid arthrodire from the upper devonian of Hunan China." Vertebrata Pal Asiatica 42.2 (2003): 154-161.