Wilson J A, Szalay F S
Folia Primatol (Basel). 1976;25(4):294-312. doi: 10.1159/000155722.
The primate Margarita stevensi n. gen. and n. sp. is described from late Eocene sediments of Texas, North America. The crushed skull of the type specimen is in the size range of Lepilemur leucopus, and the most recent relative of the new form appears to be the middle Eocene European adapid Europolemur klatti from the Geiseltal localities of the DDR. There are no indications that Margarita is closely related to the notharctine adapids. The new primate suggests that the Eocene of eastern North America was the homeland of lemuriforms with close European phylogenetic affinities. The posteriorly directed foramen magnum indicates a relatively small brain size and the dentition suggests an insectivorous-carnivorous dietary regime.
灵长类动物玛格丽塔·史蒂文森新属及新种是根据北美得克萨斯州始新世晚期沉积物描述的。模式标本的破碎头骨大小在白足鼬狐猴的范围内，新物种最近的亲属似乎是来自民主德国盖泽尔塔尔地区的始新世中期欧洲兔猴科动物欧洲兔猴。没有迹象表明玛格丽塔与北狐猴科兔猴类有密切关系。这种新的灵长类动物表明，北美东部的始新世是具有密切欧洲系统发育亲缘关系的狐猴形动物的发源地。枕骨大孔向后表明脑容量相对较小，牙齿表明其饮食为食虫 - 食肉型。
