# Errivaspis

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***Errivaspis*** is an [extinct](/source/Extinct) [genus](/source/Genus) of [pteraspid](/source/Pteraspid) [heterostracan](/source/Heterostracan) [agnathan](/source/Agnatha) [vertebrate](/source/Vertebrate) known from fossils at the Wayne Hereford Quarry, of [Early Devonian](/source/Early_Devonian) [England](/source/England), and of [Podolia](/source/Podolia), Early Devonian [Ukraine](/source/Ukraine). It was originally described by Dr. Errol Ivor White as one of five form-variants of *[Pteraspis](/source/Pteraspis) rostrata*, i.e., "*Pteraspis rostrata var. waynesis*.[1] In 1984, Alain Blieck moved *var. waynesis* into its own genus, *Errivaspis*, which he named after Dr. White.[1][2] Other later researchers would then mistakenly assume that Blieck [synonymized](/source/Synonym_(taxonomy)) the entire genus of *Pteraspis* into *Errivaspis*.

## Description

*Errivaspis* had large dorsal plates and ventral plates, the linking [branchial](/source/Gills) plate, as well as a cornual plate at the side, an [orbital](/source/Orbit_(anatomy)) plate around the eye. A [rostral](/source/Rostral_scale) plate formed a pointed ‘snout’, several small plates around the mouth, and a dorsal spine pointing backwards. The posterior half of the body was covered with small [scales](/source/Scale_(zoology)). The caudal fin was fan-shaped.

## References

1. Dineley, David L. & Metcalf, S. J. (1999). [*Fossil fishes of Great Britain (Volume 16 of Geological conservation review series)*](https://books.google.com/books?id=b8ROAQAAIAAJ&q=birkenia). Joint Nature Conservation Committee. pp. 133, 134(675). ISBN 9781861074706.

1. Blieck, Alain. "Les Hétérostracés Ptéraspidiformes, Agnathes du Silurien-Dévonien du Continent nord-atlantique et des blocs avoisinants: révision systématique, phylogénie, biostratigraphie, biogéographie." (1984).

- [Michael J. Benton](/source/Michael_J._Benton), "Vertebrate Palaeontology" 3rd Edition, p. 48 - 49 (Blackwell Publishing, 2005)

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