A new specimen of the early-branching sauropodomorph dinosaur from the Chuanjie Basin,Lufeng,Yunnan Province
At present,early-branching sauropodomorph dinosaurs from China are mainly discovered in the Lower Jurassic in Lufeng,Yunnan Province.A new specimen of the early-branching sauropodomorph from the Lufeng Formation of the Chuanjie Basin,Lufeng,including relatively complete cervical and dorsal vertebrae as well as a broken scapula,pubes and pedal elements,is described here.The osteological morphology of the new specimen is described in detail and compared with other early-branching sauropodomorphs.The specimen is more similar to that of Lufengosaurus than to other early-branching sauropodomorphs from the Lufeng Formation.Phylogenetic analysis recovers this specimen as a part of a polytomy with Coloradisaurus and Glacialisaurus,and they are referred to Massospondylidae along with Lufengosaurus.The unfused centrum and neural arch of the cervical and dorsal ver-tebrae of the new specimen indicate that the ontogenetic stage of this individual is juvenile-subadult.This discovery increases the diversity of Massospondylidae from Asia,and expands our knowledge of the Lufeng dinosaur fauna.
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