Haestasaurus becklesii and Altispinax dunkeri, two lesser-known oldbie british dinosaurs

Source: http://www.encyklopedia.dinozaury.com/index.php/Haestasaurus

Name: Hastasaurus becklesii

Name Meaning: The people of Hasta Reptile

First Described: 2015

Described By: Upchurch, Mannion, & Taylor

Classification: Dinosauria, Saurischia, Eusaurischia, Sauropodomorpha, Plateosauria, Massopoda, Sauropodiformes, Anchisauria, Sauropoda, Gravisauria, Eusauropoda, Neosauropoda, Macronaria

Hoo boy do I have a story for you guys today. Yet again we have another sauropod that has been through the throws of insane classification despite the smallest fragments of bones being known for the animal. At first, a large forelimb was assigned to Pelorosaurus back in 1851, and then the limb bones were shoved away in a private collection. In 1891, the bones were acquired by the British Museum of Natural History. Before this, however, some bones were misidentified to belong to the genus; Marsh then coined these bones a new genus, Morosaurus becklesii. The original discoverer of these bones, Lydekker, stuck them in Cetiosaurus instead. It took until 1932 for Huene to decide that the original P. becklesii should be its own genus, but didn’t name it, just saying Gen. becklesii with indeterminate placement in Macronaria. In 1990 it was confirmed that it was not a species of Pelorosaurus, and it took until 2015 for someone to finally describe it fully as different. Phew. Love me some chaotic classification. It is also known from skin impressions, with non-overlapping hexagonal scales, that decrease in size towards the elbow to allow for greater flexibility. It was found in the Hastings Beds, England, dating to the Berriasian to Valanginian ages of the early Cretaceous, about 140 million years ago. 

Source: 

https://en.wikipedia.org/wiki/Haestasaurus