Abstract
ABSTRACT The Lufeng locality of China was a major biodiversity hotspot for sauropods and tritylodontids during the Early Jurassic. We describe a partly crushed cranium with complete dentition and dentaries from the Early Jurassic Lufeng Formation of China that we refer to Lufengia. The upper postcanine row length is 10.27 mm, representing one of the smallest tritylodontids to date. Lufengia and Dianzhongia are comparable in the upper postcanine dental pattern in having upper postcanine teeth with the cusp formula 2-3-3 and a small distolingual cusp. Based on the new discovery, Dianzhongia is here considered to be an older individual of Lufengia. Through the micro-computed tomography (micro-CT) of the fossil, differing paths of upper and lower dental replacements alongside new details about tooth replacement in tritylodontids have been revealed.
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