The late Eocene prosimian Wadilemur elegans from the Jebel Qatrani Formation, northern Egypt, was originally interpreted as an anchomomyin adapiform primate based on limited information from the lower molars and distal premolars. Recently recovered fossils attributable to this species, including a proximal femur, the fourth upper premolar and first and second upper molars, and a mandible preserving the lower second premolar and lower canine and incisor alveoli, reveal a number of derived morphological similarities shared with crown strepsirrhines and, in particular, Miocene-to-Recent stem and crown galagids, to the exclusion of known adapiforms. Phylogenetic analysis of 359 morphological features scored across 95 living and extinct crown primate taxa supports a stem galagid placement for Wadilemur and older Saharagalago, and a close relationship between crown strepsirrhines and the Eocene African taxa "Anchomomys" milleri, Djebelemur, and Plesiopithecus (none of which appear to be closely related to European anchomomyins). This scheme of relationships supports the hypothesis that crown Strepsirrhini is of Afro-Arabian origin and that lemuriforms likely colonized Madagascar by crossing the Mozambique Channel. Wadilemur's known dental and postcranial morphology provides additional support for the hypothesis that galagids and lorisids had diverged by the close of the middle Eocene, and, by bolstering the approximately 37 million-year-old calibration point for crown lorisiform origins provided by Saharagalago, indirect support for the hypothesis of an ancient origin of crown Strepsirrhini and crown Primates.

译文

:根据来自下臼齿和远前磨牙的有限信息,来自埃及北部杰贝勒·卡特兰尼组的始新世早猿Wadilemur elegans最初被解释为an鱼霉素adapiform灵长类动物。近期归因于该物种的化石,包括股骨近端,第四上前磨牙以及第一和第二上磨牙,以及保留下第二前磨牙和下犬齿和门牙牙槽的下颌骨,揭示了许多与冠状头孢菌素共有的形态相似性尤其是中新世至最近的茎冠和冠龙,不包括已知的豆状目。系统发育分析对95个活的和绝种的冠灵长类动物分类群中的359个形态特征进行的系统发育分析,支持Wadilemur和较旧的撒哈拉戈拉戈的茎galagid放置,并支持冠状头孢菌素与始新世非洲类群“ Anchomomys” milleri,Djebelemur和Plesiopithecus(无似乎与欧洲an鱼紧密相关)。这种关系方案支持这样的假说,即斯特雷普西里尼王冠是非裔阿拉伯血统,并且通过穿越莫桑比克海峡,蓝藻类很可能定居在马达加斯加。 Wadilemur已知的牙齿和颅后形态为中古始新世末期盖拉各斯和鸢尾科已经分叉的假说提供了额外的支持,并且通过支持由撒哈拉拉戈提供的大约3700万年前的冠状梨形起源校准点,间接支持冠斯特雷西尼(Strepsirrhini)和灵长类动物的古代起源的假说。

+1
+2
100研值 100研值 ¥99课程
检索文献一次
下载文献一次

去下载>

成功解锁2个技能,为你点赞

《SCI写作十大必备语法》
解决你的SCI语法难题!

技能熟练度+1

视频课《玩转文献检索》
让你成为检索达人!

恭喜完成新手挑战

手机微信扫一扫,添加好友领取

免费领《Endnote文献管理工具+教程》

微信扫码, 免费领取

手机登录

获取验证码
登录