# Heightingtonaspis

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***Heightingtonaspis*** is an [extinct](/source/Extinct) [genus](/source/Genus) of primitive [arthrodire](/source/Arthrodire) [placoderm](/source/Placoderm) fish from the [Devonian](/source/Devonian) period in [Great Britain](/source/Great_Britain), and currently contains three species.

The [type species](/source/Type_species) ***Heightingtonaspis anglica*** was [described](/source/Scientifically_described) by [Ramsay Traquair](/source/Ramsay_Traquair) in 1890, and was initially named *[Phlyctaenius](/source/Phlyctaenius) anglicus*. The [holotype](/source/Holotype) specimen [NHMUK](/source/Natural_History_Museum,_London) PAL PV P 29417 was first discovered on the surface at the [Old Red Sandstone](/source/Old_Red_Sandstone) [supergroup](/source/Supergroup_(stratigraphy)), [Shropshire](/source/Shropshire), [England](/source/England) and the fossils were [radiocarbon dated](/source/Radiocarbon_date) *[in situ](/source/In_situ)* to 416 million years old.[1][2][3] it has also been found in the [Senni Beds](/source/Senni_Beds) of [Wales](/source/Wales).[3]

***Heightingtonaspis clarkei*** was described by [Charles R. Eastman](/source/Charles_R._Eastman) in 1907, and was originally named *[Kujdanowiaspis](/source/Kujdanowiaspis) clarkei*. It was later revised and reassigned to the genus *Heightingtonaspis* by Denison in 1978.[1][4]

***Heightingtonaspis willsi*** was described by White in 1961, and was originally named *Kujdanowiaspis willsi*, but was later reassigned to the genus *Heightingtonaspis*, which was created in 1969 by White.[4] *H. willsi* was discovered in the same location as *H. anglica*, in [Shropshire](/source/Shropshire), [England](/source/England).[1][2][3]

*Heightingtonaspis* is one of the more [basal](/source/Basal_(phylogenetics)) members of the [order](/source/Order_(biology)) [Arthrodira](/source/Arthrodira), as shown in the [cladogram](/source/Cladogram) below:

## References

1. Robert Denison. (1978). Placodermi. In H.-P. Schultze (ed.), *Handbook of Palaeoichthyology* 2:1-128

1. Dineley D. L., Metcalfe S. J. (1999). Chapter 4. Early Devonian fossil fishes sites of the Welsh Borders, Fossil Fishes of Great Britain, 2731

1. White, E.I. (1969). The deepest vertebrate fossil and other arctolepid fishes. *Biological Journal of the Linnean Society* 1(3): 293-310

1. Dupret, Vincent (2010). ["Revision of the genus Kujdanowiaspis Stensiö, 1942 (Placodermi, Arthrodira, "Actinolepida") from the Lower Devonian of Podolia (Ukraine)"](https://www.academia.edu/2056092). *Geodiversitas*. **32** (1): 5–63. [doi:10.5252/g2010n1a1](https://doi.org/10.5252/g2010n1a1). [S2CID 129505974](https://api.semanticscholar.org/CorpusID:129505974)

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