''Polacanthoides'' (meaning '' Polacanthus like'') is an extinct

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of nodosaurid

dinosaur Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is t ...

from

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

. It lived about 140 to 135 million years ago in what is now

England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe b ...

. It was named by Nopsca in 1928. The type specimen is BMNH 2584. It is a possible junior synonym of '' Hylaeosaurus'' and '' Polacanthus''. It is now considered to be a ''

nomen dubium In binomial nomenclature, a ''nomen dubium'' (Latin for "doubtful name", plural ''nomina dubia'') is a scientific name that is of unknown or doubtful application. Zoology In case of a ''nomen dubium'' it may be impossible to determine whether a s ...

'' or a chimera.Nopcsa, F. (1928), "Palaeontological notes on reptiles." ''Geologica Hungarica, Series Palaeontologica'', tomus, 1, -Pasc. 1, p. 1-84

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* Nodosaurids Valanginian life Early Cretaceous dinosaurs of Europe Cretaceous England Fossils of England Fossil taxa described in 1928 Paleontological chimeras Ornithischian genera {{Ornithischian-stub

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