嘉宾（Guest）： 张瀚文 Bristol大学博士研究生
        讨论主题（Topic）： Elephas recki: the wastebasket?
        时间（Time）： 2018.8.24（周五） 下午3:00—4:00
                                （2018.8.24 Friday 3:00—4:00 PM）
        地点（Location）： 南楼321室
　　                                （Room No. 321, South building）
    内容简介：
        本报告为研究生交流会第五期。研究生交流会旨在促进学生之间的学术交流，碰撞出新的科研思路的火花，增进友谊。报告内容可以是自己的研究，也可以是自己阅读文献的分享，形式比较宽松，并希望能包含较多的讨论环节。
        本期主讲人为主攻真象科的系统演化的英国Bristol大学的博士研究生张瀚文。本次报告介绍并讨论一类在上新世-更新世广泛分布的象类Elephas recki。届时欢迎大家莅临讨论这一类神奇有趣的史前象类。
        The Elephas recki complex of Plio-Pleistocene East Africa is an important lineage for understanding the evolutionary relationships of crown elephantid genera, for traditionally this lineage has long been held as an anagenetic transitional series from an Elephas-type ancestor to the immediate precursor of Eurasian Palaeoloxodon, comprising of five successive chronosubspecies (E. recki. brumpti→E. r. shungurensis→E. r. atavus→E. r. ileretensis→E. r. recki). However, this model is now under serious contention as recent ancient DNA evidence reveals the phylogenetic closeness of Palaeoloxodon to Loxodonta (the genus which includes the living African elephant species), rather than to Elephas (the genus which includes the modern Asian elephant). Reconciling these morphological observations with a novel cladistic analysis (>130 characters) reveals crucial new insights about the systematics, biogeography, and morphological evolution of early crown elephantids.

                                                    脊椎动物演化与人类起源重点实验室&研究生会
                                                   Key Laboratory of Vertebrate Evolution and Human Origins of
                                                             Chinese Academy of Sciences & Student union  

                                                                              2018.8.15