Simplify the following text for a Grade 9 native English-speaking person.
Original: A larger category consists of related basal sauropodomorphs assigned to Thecodontosaurus . These include in chronological order : Thecodontosaurus gibbidens Cope 1878 ; Thecodontosaurus skirtopodus Seeley 1894 ; Thecodontosaurus polyzelus ( Hitchcock 1865 ) von Huene 1906 ; Thecodontosaurus hermannianus von Huene 1908 ; Thecodontosaurus diagnosticus Fraas 1912 ; Thecodontosaurus minor Haughton 1918 ( = `` Thecodontosaurus minimus '' ) ; Thecodontosaurus dubius Haughton 1924 ; Thecodontosaurus browni ( Seeley 1895 ) von Huene 1932 and Thecodontosaurus alophos Haughton 1932 .
Simplified: Fossils of Thecodontosaurus have been found in England ( near Bristol ) and Wales , which were probably dry and desert-like when Thecodontosaurus lived .