Syngonosaurus
| Syngonosaurus Temporal range: late Albian
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_By_Richard_Lydekker_(1888)_(20571332452).jpg)
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| Vertebra of S. macrocercus as seen from two different angles | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Dinosauria |
| Clade: | †Ornithischia |
| Clade: | †Ornithopoda |
| Clade: | †Iguanodontia |
| Genus: | †Syngonosaurus Seeley, 1879 |
| Species: | †S. macrocercus
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| Binomial name | |
| †Syngonosaurus macrocercus Seeley, 1879
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| Synonyms | |
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Syngonosaurus is an extinct genus of ornithopod dinosaur from the Early Cretaceous. It was an iguanodontian discovered in the Cambridge Greensand of England[1] and was first described in 1879. The type species, S. macrocercus, was described by British paleontologist Harry Seeley in 1879[2] and it was later synonymised with Acanthopholis, but the genus was reinstated in a 2020 study, when Syngonosaurus and Eucercosaurus were reinterpreted as basal iguanodontians.[3]
Discovery and naming
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In 1869 Harry Govier Seeley named several new species of Acanthopholis based on remains from the Cambridge Greensand, including A. macrocercus, based on specimens CAMSM B55570-55609.[4]
In 1879 Seeley named the genus Syngonosaurus based on part of the type material of Acanthopholis macrocercus.[2]
In 1999 Xabier Pereda-Superbiola and Paul M. Barrett reviewed all Acanthopholis material. They concluded that all species were nomina dubia whose syntype specimens were composites of non-diagnostic ankylosaur and ornithopod remains; including Syngonosaurus.[5]
Syngonosaurus was synonymised with Acanthopholis in 1999, but the genus was reinstated in a 2020 study, when Syngonosaurus and Eucercosaurus were reinterpreted as basal iguanodontians.[3]
Classification
[edit | edit source]Syngonosaurus was seen as an ankylosaur in both a 2001 publication[1] and a 2004 publication.[6] In 2020, Syngonosaurus was classified into Iguanodontia.[3]
References
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- ^ M. K. Vickaryous, T. Maryanska, and D. B. Weishampel. 2004. Ankylosauria. In D. B. Weishampel, P. Dodson, and H. Osmolska (eds.), The Dinosauria (second edition). University of California Press, Berkeley 363-392
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