New Species of Iguanodontian Dinosaur Discovered on Isle of Wight

Reconstruction of Brighstoneus simmondsi Head

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Reconstruction of the head of Brighstoneus simmondsi. Credit: John Sibbick

  • Natural History Museum and University of Portsmouth researchers explain brand-new types of dinosaur
  • Discoveries of iguanodontian dinosaurs from the Isle of Wight have actually formerly just been appointed to Iguanodon or Mantellisaurus
  • Diversity of dinosaurs in the Early Cretaceous of the UK is much higher than formerly believed
Brighstoneus simmondsi Left Dentary

Brighstoneus simmondsi left dentary (jaw) in median view. Credit:Dr Jeremy Lockwood

Scientists from the Natural History Museum and University of Portsmouth have actually explained a brand-new genus and types of dinosaur from a specimen discovered on the Isle of Wight.

Following on from a brand-new types of ankylosaur, brand-new types of therapod, and 2 brand-new types of spinosaur dinosaurs, Brighstoneus simmondsi is the most recent in a host of brand-new dinosaur types explained by Museum researchers in current weeks.

Brighstoneus and Mantellisaurs

Brighstoneus andMantellisaurs Credit: John Sibbick

The brand-new dinosaur is an iguanodontian, a group that likewise consists of the renowned Iguanodon and Mantellisaurus Until now, iguanodontian product discovered from the Wealden Group (representing part of the Early Cretaceous duration) on the Isle of Wight has actually generally been described as one of these 2 dinosaurs– with more gracile fossil bones appointed to Mantellisaurus and the bigger and more robust product appointed to Iguanodon

Nasal and Maxilla

Nasal andMaxilla Credit:Dr Jeremy Lockwood

However, whenDr Jeremy Lockwood– a PhD trainee at the Museum and University of Portsmouth– was analyzing the specimen, he discovered a number of special characteristics that identified it from either of these other dinosaurs.

Brighstoneus simmondsi Dorsal Vertebra With Pathological Fracture

Brighstoneus simmondsi dorsal vertebra with pathological fracture. Credit:Dr Jeremy Lockwood

“For me, the number of teeth was a sign,”Dr Lockwood states. “Mantellisaurus has 23 or 24, however this has28 It likewise had a round nose, whereas the other types have really straight noses. Altogether, these and other little distinctions made it really certainly a brand-new types.”

The herbivorous dinosaur had to do with 8 meters in length and weighed about 900 kg. Published in the peer-reviewed Journal of Systematic Palaeontology,Dr Lockwood explains the types and names it Brighstoneus simmondsi: Brighstoneus after the town of Brighstone, close to the excavation website, and simmondsi honoringMr Keith Simmonds, who made the discovery of the specimen in 1978.

The discovery of this brand-new types recommends that there were much more iguanodontian dinosaurs in the Early Cretaceous of the UK than formerly believed, which just appointing specimens from this duration to either Iguanodon or Mantellisaurus need to alter.

“We’re looking at six, maybe seven million years of deposits, and I think the genus lengths have been overestimated in the past,” statesDr Lockwood. “If that’s the case on the island, we could be seeing many more new species. It seems so unlikely to just have two animals being exactly the same for millions of years without change.”

Museum researcherDr Susannah Maidment, a co-author of the paper, states: “The explaining of this brand-new types reveals that there is plainly a higher variety of iguanodontian dinosaurs in the Early Cretaceous of the UK than formerly understood. It’s likewise revealing that the century-old paradigm that gracile iguanodontian bones discovered on the island come from Mantellisaurus and big components come from Iguanodon can no longer be corroborated.”

Jeremy Lockwood

Dr Jeremy Lockwood in Compton Bay Isle ofWight Credit:Dr Jeremy Lockwood

The Isle of Wight has actually long been related to dinosaur discovery, and even yielded the vital specimens that led Sir Richard Owen to coin the term Dinosauria The authors conclude that the explaining of Brighstoneus simmondsi as a brand-new types requires a reassessment of Isle of Wight product:

“British dinosaurs are certainly not something that’s done and dusted at all,” statesDr Lockwood. “I think we could be on to a bit of a renaissance.”

Reference: “A new hadrosauriform dinosaur from the Wessex Formation, Wealden Group (Early Cretaceous), of the Isle of Wight, Southern England” 10 November 2021, Journal of Systematic Palaeontology
DOI: 10.1080/1477201920211978005