Jacobs L L
Nature. 1981 Feb 12;289(5798):585-7. doi: 10.1038/289585a0.
In 1975-79, joint expeditions from Yale University and the Geological Survey of Pakistan (YGSP) recovered fossil lorisids in the Siwalik Group of Pakistan from four localities, spanning a period before 10 Myr ago to about 7 Myr ago. In three of the localities, only isolated teeth or fragments were found, whereas the fourth and youngest locality yielded dental, cranial and some postcranial remains of a single individual described here as a new genus and species. These specimens are the first fossil lorisids known from outside East Africa, and include the only recovered postcranial remains from slow-moving arboreal lorisines. The findings indicate that significant tracts of forests in the Siwalik environmental mosaic may have been utilized by ominoid primates, notably Ramapithecus.
1975年至1979年期间,耶鲁大学与巴基斯坦地质调查局联合开展的考察队在巴基斯坦西瓦利克群的四个地点发现了懒猴科化石,时间跨度从1000万年前到约700万年前。在其中三个地点,只发现了孤立的牙齿或碎片,而在第四个也是最年轻的地点,出土了一个个体的牙齿、颅骨和一些颅后骨骼遗迹,在此将其描述为一个新属和新物种。这些标本是东非以外已知的首批懒猴科化石,还包括从行动缓慢的树栖懒猴亚科中发现的唯一颅后骨骼遗迹。研究结果表明,西瓦利克环境组合中的大片森林可能曾被类人猿灵长类动物利用,尤其是腊玛古猿。