摘要:

The internal carotid artery in lorisiform primates was identified on the basis of its close association with the internal carotid nerve (postsynaptic sympathetic trunk). An atrophic vessel in the lorisine Arctocebus resembles the internal carotid artery of Lemur in that it enters the tympanic bulla and promontory tube closely associated with the internal carotid nerve. According to this criterion of homology, the enigmatic lorisiform extrabullar carotid artery is not homologous with the internal carotid (promontory) artery of lemuri-form primates or the medial internal carotid artery of the dog. Hypotheses about strepsirhine evolution must take these morphological facts into account.

ISSN:0015-5713    

DOI:10.1159/000155977

出版商:S. Karger AG    

年代:1981

数据来源: Karger

摘要:

A skull of Mesopithecus pentelicus (Roth and Wagner) from the Turolian (Upper Miocene) of Pikermi (Greece) shows hole-shaped bitemarks. Considering the behavior and the character of the dentition of the groups of carnivores represented in Pikermi, it is supposed that these bitemarks have been caused by a felid of the size of a leopard. In the fauna of Pikermi only Metailurus parvulus (Hensel) can be taken into consideration. By the defects on a skull of a juvenile Australopithecine, interpreted by Brain in 1970 as bitemarks of a leopard, the above explanation gets a very essential support.

ISSN:0015-5713    

DOI:10.1159/000155978

出版商:S. Karger AG    

年代:1981

数据来源: Karger

摘要:

This study describes how adults of Kloss’s gibbons (Hylobates klossii) inhabiting the central rain forest of Siberut Island, Indonesia, help their offspring achieve reproductive success. Adults of these monogamous apes exclude maturing offspring from the family and territory through intrasexual aggression. Adults may then assist the offspring to establish a territory contiguous to theirs. Aid may take the form of accompanying offspring into suitable areas not yet occupied or forcefully annexing part of an adjacent territory. Replacement of an adult by its offspring may also occur. A conclusion is that the probability of a young gibbon gaining a territory and mate is greater in the proximity of its parental group than in areas farther afiel

ISSN:0015-5713    

DOI:10.1159/000155979

出版商:S. Karger AG    

年代:1981

数据来源: Karger

摘要:

A 5-month field study on both the distribution and ecology of Callimico goeldii was carried out in the seasonally dry rain forest of north-western Bolivia. The species was found to be very sparsely distributed (approximately one group per 4 km2) in isolated groups of about 6 animals throughout the study area. Callimico was found to associate a great deal with two species of Saguinus that inhabit the same region in greater densities. It appears to be a habitat specialist, preferring low-lying and damp, but well-drained, bamboo forest and spending nearly all its time within 3 m of ground level, travelling mainly by vertical clinging and leaping. We believe that this ecological specialisation accounts for the species’ discontinuous microdistribution, and that this in turn is related to Callimico’s distinctive pattern of social organisat

ISSN:0015-5713    

DOI:10.1159/000155980

出版商:S. Karger AG    

年代:1981

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000155981

出版商:S. Karger AG    

年代:1981

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000155976

出版商:S. Karger AG    

年代:1981

数据来源: Karger