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Echinodon becklesii

Echinodon is derived from the Greek "ekhinos" (hedgehog) and "odon" (tooth), referring to the "prickly" serrations on the edges of the teeth.
The species epithet, becklesii, honours collector Samuel Husbands Beckles. Sauraechinodon (Owen, 1861)
Sauraechmodon (Falconer, 1861)
Saurechinodon (Romer, 1956) The first remains of Echinodon were discovered in the Lulworth Formation of the Purbeck Limestone Group (aka "The Purbeck Beds"), possibly in the "Dirt Bed" aka "The Mammal Pit", high up a cliff in Durdlestone Bay near Swanage on the Isle of Purbeck, Dorset, England, by Samuel Beckles. Solid evidence is sadly lacking, but if they were indeed found in "The Mammal Pit", they were found in 1857, which is when Beckles excavated that particular site. They were initially identified as the property of a type of lacertilian (lizard).
As Owen didn't nominate a holotype (a single specimen that defines the features of an organism) from the original syntypes (a series of specimens with no holotype selected), NHMUK 48209—48210 (a partial snout that split into 2 slabs, during or shortly after collection) was later selected as the lectotype (a specimen from the original syntypes to play the role of a holotype).
The rest of the original syntypes (isolated jaw bones: NHMUK 48211—48215b) became paralectotypes (the specimens that remain after a lectotype has been selected). Referred material includes two jaw fragments (NHMUK 48229 and NHMUK 40723) from the same area, and isolated teeth from Lovell's quarry (DORCM GS 1164-5, 1167, 1171) and Sunnydown farm (DORCM GS 1194, 1212-6, 1222-3). A partial left lower jaw bone (NHMUK 48381) from the "Middle Purbecks" of Durlston Bay, recently rediscovered by Ryoko Matsumoto in the collections of the Natural History Museum, London, where it had been labelled as an indeterminate crocodilian, was also referred to Echinodon. In 1981, Galton removed "granicones" (found on the same slab as a jaw and initially assigned to Nuthetes destructor by Owen in 1879) from Stegosauria where they had been referred by Delair in 1959, and transferred them to Echinodon, because Scutellosaurus from the Kayenta Formation of Arizona has them and he considered them both to be "fabrosaurids". In 2002, Barrett correctly identified them as leg armour from a prehistoric turtle. Many specimens from the Brushy Basin member of Colorado's Morrison Formation at Fruita were described as "indeterminate fabrosaur remains" in 1984 by George Callison who changed his mind by 1987 and assigned them to Echinodon as Echinodon sp.
Richard Butler and colleagues named them Fruitadens haagarorum in 2010.