陕西鄂尔多斯盆地中三叠统一离片椎类牙齿化石
收稿日期: 2021-07-20
网络出版日期: 2021-08-09
基金资助
国家自然科学基金基础科学中心项目(批准号)资助(41688103)
A Temnospondyl tooth from the Middle Triassic of the Ordos Basin, Shaanxi Province
Received date: 2021-07-20
Online published: 2021-08-09
武瑞, 涂黎, 韩凤禄 . 陕西鄂尔多斯盆地中三叠统一离片椎类牙齿化石[J]. 古脊椎动物学报, 2022 , 60(1) : 54 -58 . DOI: 10.19615/j.cnki.2096-9899.210810
An isolated large temnospondyl tooth was discovered from the Middle Triassic Tongchuan Formation, Weibei Oilfield, Ordos Basin, Shaanxi Province of China. Compared with the teeth of crocodylomorphs, plesiosaurs and temnospondyls, the tooth can be referred to temnospondyl based on the following features: the crown is elongated and recurved with a circular cross-section; there are no denticles or carinae on the crown; well-marked apicobasal grooves are shown on the crown surface. This tooth represents the first temnospondyl found in the Middle Triassic Tongchuan Formation and is the youngest fossil record of temnospondyls in the North China Block.
Key words： Ordos Basin; Middle Triassic; Tongchuan Formation; Temnospondyli; tooth
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