ISSN:0015-5713    

DOI:10.1159/000156331

出版商:S. Karger AG    

年代:1988

数据来源: Karger

摘要:

Locomotor diversity of Eocene primates of North America and Europe was well developed, with species of both Adapidae and Omomyidae showing a wide spectrum of movements. Besides documenting the locomotor diversity in the Eocene, this paper shows that adapid foot morphology shares derived features with extant strepsirhines. Thus, the Omomyidae best resemble the ancestral euprimate in terms of foot morphology and locomotion. The generalized locomotor repertoire of the modern cheirogaleids represents the best model for the movement pattern of the ancestral euprimate.

ISSN:0015-5713    

DOI:10.1159/000156332

出版商:S. Karger AG    

年代:1988

数据来源: Karger

摘要:

If trained to walk bipedally at a juvenile age and over periods of some months or years, Japanese monkeys gradually acquire a pronounced lordosis of the lumbar spine. This lordosis persists even in the ‘normal’, pronograde posture of these animals. It is due to a relative increase of the ventral lengths of the vertebral bodies. This morphological change is clearly an adaptation to the mechanical necessities of the upright body posture. Our result is in complete accordance with the development of a lordosis in human children between 1 and 5 years, as described recently by oth

ISSN:0015-5713    

DOI:10.1159/000156333

出版商:S. Karger AG    

年代:1988

数据来源: Karger

摘要:

This paper presents a detailed systematic revision of the small catarrhine primates from the early Miocene of East Africa, recovered from sites in Western Kenya and in Uganda dated at between 22 and 17 m.y. Revised diagnoses and amended hypodigms for each of the species are presented. In addition to the currently identified taxa, Limnopithecus legetet Hopwood, 1933, Dendropithecus macinnesi (Le Gros Clark and Leakey, 1950) and Micropithecus clarki Fleagle and Simons, 1978, two further species are recognized. Limnopithecus evansi (Maclnnes, 1943) is resurrected as a valid species, based primarily on previously described material from Songhor, and a new genus, Kalepithecus, is described here for the first time, in order to accommodate distinctive material from Songhor and Koru. The distribution of each species in time and space, and the phylogenetic relationships, are discussed in the light of this taxonomic revision.

ISSN:0015-5713    

DOI:10.1159/000156334

出版商:S. Karger AG    

年代:1988

数据来源: Karger

摘要:

Grooming between female chimpanzees and their offspring was studied in the Mahale Mountains, Tanzania. Infants under 2 years of age rarely groomed their mothers, and mostly groomed accessible parts of their mothers’ bodies, if they did so. Most older adolescents reciprocated grooming with their mothers almost equally. Daughters appeared to mature socially earlier than sons, judging from the earlier ages at which a female infant began to groom her mother, groom mutually with her, and groom others. Weaning infants groomed their mothers more when they were in oestrus than when they were not. Development of the use of grooming as a means of social manoeuvring is discusse

ISSN:0015-5713    

DOI:10.1159/000156335

出版商:S. Karger AG    

年代:1988

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156336

出版商:S. Karger AG    

年代:1988

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156337

出版商:S. Karger AG    

年代:1988

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156338

出版商:S. Karger AG    

年代:1988

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156339

出版商:S. Karger AG    

年代:1988

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156340

出版商:S. Karger AG    

年代:1988

数据来源: Karger