Reptilia - Dinosauria - Nodosauridae

Alternative spelling: Polyacanthus

Synonym: Euacanthus Owen 1897 [objective synonym]

Full reference: W. Fox. 1866. On a new Wealden saurian named Polacanthus. Report of the British Association for the Advancement of Science, Birmingham 1865:56

Parent taxon: Nodosauridae according to P. C. Sereno 1986

Sister taxa: Aletopelta, Animantarx, Antarctopelta, Edmontonia, Edmontoniinae, Glyptodontopelta, Hungarosaurus, Liaoningosaurus, Niobrarasaurus, Nodosaurinae, Nodosaurus, Panoplosaurinae, Panoplosaurus, Pawpawsaurus, Peloroplites, Sarcolestes, Sauropelta, Sauropeltinae, Silvisaurus, Stegopelta, Struthiosaurinae, Struthiosaurus, Texasetes, Zhejiangosaurus, Zhongyuansaurus, Syngonosaurus

Subtaxa: Polacanthus foxii, Polacanthus rudgwickensis

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Ecology: ground dwelling herbivore