Anglaspis

Anglaspis; Temporal range: Late Silurian - Early Devonian
	Restoration of Anglaspis heintzi
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Pteraspidomorphi
Subclass:	Heterostraci
Order:	Cyathaspidiformes
Suborder:	Cyathaspidida
Family:	Ariaspidae
Genus:	Anglaspis

Anglaspis is an extinct genus of cyathaspidiform heterostracan agnathan. Fossils are found in marine strata of Europe, from the late Silurian period until genus' extinction during the Early Devonian. It appears to have had dorsal shields, gill pouches, and nasal openings lying on the roof of the mouth cavity.^[1]

Late Silurian species of Anglaspis are found in marine strata of Wales and England, while most of the Early Devonian species are found in the Devonian-aged strata of Spitsbergen island, in Svalbard, Norway.^[2]

Taxonomy

Anglaspis was, at various times, placed in the families Cyathaspididae,^[3] Poraspididae,^[4] and in its own family, Anglaspididae. Currently, it is placed in Ariaspidae with Ariaspis, and Listraspis, and is considered to be closely related to, if not the progenitor of Liliaspis and Paraliliaspis.^[5]

References

^ Watson, David Meredith Seares (1954-10-28). "A Consideration of Ostracoderms". Phil. Trans. R. Soc. Lond. B. 238 (652): 1–25. doi:10.1098/rstb.1954.0004. ISSN 0080-4622.
^ "Anglaspis sp. - Naturhistorisk museum". Natural History Museum at the University of Oslo (in Norwegian). Retrieved 2018-11-26. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)
^ Ilyes, Robert R.; Ohta, Yoshihide; Guddingsmo, Jonny (1995-01-06). "The Downtonian and Devonian vertebrates of Spitsbergen. *. New Heterostracans from the Lower Devonian Red Bay Group, northern Spitsbergen". Polar Research. 14 (1): 33–42. doi:10.3402/polar.v14i1.6649. ISSN 1751-8369.
^ Denison, Robert Howard (24 April 1964). "The Cyathaspididae; a family of Silurian and Devonian jawless vertebrates". Fieldiana: Geology. 13. Chicago Natural History Museum: 428.
^ Mette, Lundgren,; Henning, Blom, (2011). "Phylogenetic patterns in the heterostracan families Cyathaspidae, Ariaspidae and Ctenaspidae". DIVA.{{cite journal}}: CS1 maint: extra punctuation (link) CS1 maint: multiple names: authors list (link)

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[1] Watson, David Meredith Seares (1954-10-28). "A Consideration of Ostracoderms". Phil. Trans. R. Soc. Lond. B. 238 (652): 1–25. doi:10.1098/rstb.1954.0004. ISSN 0080-4622.

[2] "Anglaspis sp. - Naturhistorisk museum". Natural History Museum at the University of Oslo (in Norwegian). Retrieved 2018-11-26. {{cite web}}: Cite has empty unknown parameter: |dead-url= (help)

[3] Ilyes, Robert R.; Ohta, Yoshihide; Guddingsmo, Jonny (1995-01-06). "The Downtonian and Devonian vertebrates of Spitsbergen. *. New Heterostracans from the Lower Devonian Red Bay Group, northern Spitsbergen". Polar Research. 14 (1): 33–42. doi:10.3402/polar.v14i1.6649. ISSN 1751-8369.

[4] Denison, Robert Howard (24 April 1964). "The Cyathaspididae; a family of Silurian and Devonian jawless vertebrates". Fieldiana: Geology. 13. Chicago Natural History Museum: 428.

[5] Mette, Lundgren,; Henning, Blom, (2011). "Phylogenetic patterns in the heterostracan families Cyathaspidae, Ariaspidae and Ctenaspidae". DIVA.{{cite journal}}: CS1 maint: extra punctuation (link) CS1 maint: multiple names: authors list (link)

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