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本文所描述的■类化石为1980年林宝玉等采自西藏林周洛巴堆地区早二叠世洛巴堆组。中国科学院将该区早二叠世地层划分为两部分,下部称乌鲁龙组:其岩性为薄层灰岩夹黑色板岩,厚约40—50米;上部称洛巴堆组,根据岩性及所含化石又分为两段:上部称洛巴堆水库段:为灰岩夹中基性火山岩,厚约400米;下部称马驹拉段:为灰色、厚层至块状灰岩,厚460米。
The fossils described in this article were collected from the Early Permian Lobajiao Formation in the Lobochibai area, Linzhang, Tibet, in 1980 by Lin Baoyu et al. Chinese Academy of Sciences will be divided into two parts of the Early Permian strata, the lower part of the Urumu Formation: its lithology is a thin layer of limestone black slate, about 40-50 meters thick; upper called Loba pile group, according to Lithology and fossils are divided into two sections: the upper part of said Loba reservoir reservoir: limestone folder in the basic volcanic rocks, about 400 meters thick; the lower part of the colt pull segment: gray, thick to massive ash Rock, 460 meters thick.