Nothosaurus yangjuanensis n. sp. (Reptilia, Sauropterygia, Nothosauridae) from the middle Anisian (Middle Triassic) of Guizhou, southwestern China. Neues Jahrbuch fuer Geologie und Palaeontologie Monatshefte, 5 2006: 257-276. 260 [Zoological Record Volume 142]