Abstract
The present paper reports dental remains from Jurassic marine sediments of Hungary, referred to as Asteracanthus dunaii sp. nov. and Asteracanthus ornatissimus. Teeth of the new species Asteracanthus dunaii sp. nov. differ from all other Jurassic species of Asteracanthus by the unique occlusal ornamentation, by the presence of a mesiodistally running, low and wide transversal ridge (causing a hat-like, asymmetrical outline in cross-section view), and by the arched shape of the mesially domed second lateral teeth. The tooth material of the new species is assumed to belong to the same individual. The present study also highlights the importance of the revision of previously collected and/or not inventoried fossil materials housed in private and museum collections, and also that of untended sections of palaeontological collections worldwide. A revision of the Jurassic species of Asteracanthus, and a short summary of what we know about the feeding strategy and body size of Asteracanthus is also reported.
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