, Volume 90, Issue 3, pp 295-319

Mammals from the Late Jurassic Qigu Formation in the Southern Junggar Basin, Xinjiang, Northwest China

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Abstract

Five mammalian taxa based on teeth and jaw fragments are reported from a bonebed of the Late Jurassic (Oxfordian) Qigu Formation at the Liuhuanggou site in the southern Junggar Basin. The mammals recovered to date comprise a new eleutherodontid haramiyid, the docodonts Dsungarodon and Tegotherium, an undetermined amphilestid triconodont, and a new species of the stem zatherian Nanolestes and represent the most diverse Late Jurassic mammal assemblage of Asia. The Liuhuanggou mammal assemblage is dominated by docodonts. Acuodulodon Hu et al., 2007 from the upper part of the Shishugou Formation (Oxfordian) of the Wucaiwan area in the central Junggar Basin is a junior synonym of Dsungarodon Pfretzschner and Martin, 2005. Tegotherium has been reported from the Late Jurassic Shar Teeg locality in Mongolia. With the exception of the common occurrence of Nanolestes, the mammalian assemblage from the Late Jurassic of the Guimarota coal mine (Portugal) is quite different from that of the Late Jurassic Qigu Formation. The Guimarota assemblage is dominated by five genera of dryolestidans and several genera of multituberculates, which have not been reported from the Qigu assemblage. The known Late Jurassic mammalian assemblages of Asia are similar to the Middle Jurassic assemblages known from Asia and elsewhere in the world.

This article is a contribution to the special issue “Triassic-Jurassic biodiversity, ecosystems, and climate in the Junggar Basin, Xinjiang, Northwest China”.