Brighstoneus
Brighstoneus | |
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Select material of Brighstoneus | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Clade: | Dinosauria |
Clade: | †Ornithischia |
Clade: | †Ornithopoda |
Clade: | † Hadrosauriformes
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Genus: | †Brighstoneus Lockwood et al., 2021 |
Species: | †B. simmondsi
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Binomial name | |
†Brighstoneus simmondsi Lockwood et al., 2021
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Brighstoneus (after Brighstone, a village on the Isle of Wight) is a genus of hadrosauriform dinosaur from the Early Cretaceous Wessex Formation of the Isle of Wight, England. The genus contains a single species, Brighstoneus simmondsi, known from a partial skeleton.[1][2]
History of discovery
The holotype specimen, MIWG 6344, was discovered along with the holotype of
Brighstoneus was found to be distinct from Mantellisaurus by 2019 when being studied by the retired physician Jeremy Lockwood cataloguing all iguanodontian fossils from Wight for his PhD study at the University of Portsmouth.[2] The new taxon was named and described as the type species Brighstoneus simmondsi by Jeremy A.F. Lockwood, David Michael Martill and Susannah Maidment in 2021. The generic name refers to Brighstone, mentioning it was the residence of the nineteenth-century palaeontologist William Fox. The specific name honours Keith Simmonds as discoverer.[1]
The holotype was discovered from strata of the Wessex Formation dating from the early Barremian, at least 125 million years old. Mantellisaurus is about four million years younger. The holotype consists of a partial skeleton with skull and lower jaws. It contains the right premaxilla, both maxillae, both jugal bones, the left palpebral, the predentary, both dentaries, eight back vertebrae, the sacrum, six tail vertebrae, fourteen ribs, both ilia, a possible prepubic process of the pubic bone, the right ischium and the right thighbone. The bones were not articulated but found intermingled with the Neovenator bones over a surface of six by five metres. They had been damaged by beetle larvae prior to fossilisation. Due to the confused discovery process, two vertebrae are in private possession and were not described in 2021.[1]
Description
The describing authors indicated some distinguishing traits. Two of these were
Additionally, a unique combination of traits is present, that in themselves are not unique for the Iguanodontia. The dentary of the lower jaw shows at least twenty-eight tooth positions. Each position has a functional tooth as well as a replacement tooth. The bone walls between the tooth sockets do not run parallel to each other.[1]
Brighstoneus has an elongated and low bump on the snout, due to an abrupt transition of the higher front of the nasal bone into a lower rear. Along the back, a relatively high crest is present, reaching its tallest point over the tail base, where some
Classification
In 2021, Lockwood et al., placed Brighstoneus in the
Styracosterna
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Paleoenvironment
Brighstoneus is the third
References
- ^ S2CID 244067410.
- ^ a b Devlin, Hannah (11 November 2021). "New species of big-nosed dinosaur discovered by retired doctor". The Guardian. Retrieved 11 November 2021.
- .