Deanaspis

{{Short description|Extinct genus of trilobites}}

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| fossil_range = {{fossilrange|445|461}}

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| taxon = Deanaspis

| authority = Hughes, Ingham & Addison, 1975

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Deanaspis is a genus of asaphid trilobites in the family Trinucleidae in the Ordovician periods. It is reported only from Northern Europe and Iran.{{GBIF |title=Deanaspis Hughes, Ingham & Addison, 1975 |id=4635596 |access-date=2024-04-02}} It was named as a new genus in 1975.{{Cite journal |date=1975-12-11 |title=The morphology, classification and evolution of the Trinucleidae (Trilobita) |url=https://doi.org/10.1098/rstb.1975.0100 |journal=Philosophical Transactions of the Royal Society of London. B, Biological Sciences |volume=272 |issue=920 |pages=537–604 |doi=10.1098/rstb.1975.0100 |issn=0080-4622|url-access=subscription }}

In 2025, a member of the Galeaspida was given the same genus name ("Deanaspis" longpingi),{{cite journal |last1=Lin |first1=X. |last2=Zan |first2=C. |last3=Gai |first3=Z. |last4=Zhu |first4=M. |title=Deanaspis, a new genus of Galeaspida (jawless stem Gnathostomata) from the Silurian of Jiangxi, China, and its evolutionary implications |journal=Journal of Systematic Palaeontology |year=2025 |volume=23 |issue=1 |at=2460479 |doi=10.1080/14772019.2025.2460479 }} with a replacement name yet to be chosen.