The biodiversity changes of trilobites in the middle Yangtze region of South China in the Great Ordovician Biodiversification Event and the end-Ordovician mass extinction have been analysed. The Ordovician trilobites in this region originated in the early Tremadocian and radiated from the late Floian to the early Katian. Two peaks of diversity appeared in the late Dapingian to the early Darriwilian and the early Katian. The extinction occurred in the late Katian, followed by a survival period in the Hirnantian. The Whiterock fauna began to surpass the Ibex fauna during the early Katian and were dominant by the late Katian to the Hirnantian, indicating that Cambrian Evolutionary Fauna was gradually replaced. The study once again confirms the view that the effects of factors such as sea level, climate, oxygen content, nutrient supply, and tectogenesis differ temporally and to different degrees in different regions, resulting in differences in the vertical sequence and horizontal combination of ecosystems, which is the reason for the different evolution patterns of Ordovician trilobites in different regions.

分析了大奥陶纪生物多样性事件和奥陶纪末期大灭绝过程中华南中部长江三叶虫的生物多样性变化。该地区的奥陶纪三叶虫起源于特雷莫多克早期，并从弗洛伊恩晚期到凯蒂恩早期辐射。多样性的两个高峰出现在大坪阶晚期至早期达里维林阶和早期凯蒂安阶。灭绝发生在卡蒂安晚期，随后在赫尔南人时期存活下来。Whiterock动物区系在Katian早期开始超过Ibex动物区系，并在Katian晚期到Hirnantian占主导地位，这表明寒武纪演化动物区系逐渐被取代。该研究再次证实了以下观点：海平面，气候，氧气含量，养分供应，