Westollia

{{Short description|Extinct genus of ray-finned fishes}}

{{Automatic taxobox

| fossil_range = {{fossilrange|298.9|293.52|Asselian}}

| taxon = Westollia

| authority = White & Moy-Thomas, 1940

| type_species = {{extinct}}Lepidopterus crassus

| type_species_authority = Pohlig, 1892

| synonyms = * {{extinct}}Lepidopterus Pohlig, 1892 non Agassiz 1846

}}

Westollia is an extinct genus of ray-finned fish only known at Gottlob Quarry, from the early Asselian Goldlauter Formation of Thuringia, Germany.{{cite web|url=https://paleobiodb.org/classic/basicTaxonInfo?taxon_no=txn:35065 |title=Westollia |publisher=Paleobiology Database|access-date=24 Mar 2025}}{{Cite journal|last=Štamberg |first=S. |year=2024 |title=Redescription of the actinopterygian fish Westollia crassa (Pohlig, 1892) (Aeduellidae) from the Permian sediments of Thuringia and its relationships to other Aeduellidae |journal=PalZ |volume=98 |issue=3 |pages=491–508 |doi=10.1007/s12542-024-00696-8 |bibcode=2024PalZ...98..491S }}

The type and only species, Westollia crassa, was first described as Lepidopterus crassus, but because this genus name was preoccupied, a new genus name was given, Westollia, honoring Thomas Stanley Westoll. Redescription and study on the affinities of Westollia crassa was published by Štamberg (2024), who deesignated the complete specimen NHMS-GP1341 as its neotype.{{cite journal |last1=White |first1=Errol Ivor |last2=Moy-Thomas |first2=James Alan |date=1940 |title=XXV. — Notes on the nomenclature of fossil fishes, 3. Homonyms M–Z |journal=Journal of Natural History |series=Series 11 |volume=7 |pages=395–400 |doi=10.1080/03745481.1941.9727941}}.