摘要:

The body of the tympanic annulus in all adults of higher primates (Platyrrhini, Catarrhini) is fused to the external surface of the tympanic bulla while the crural ends are adhered to the squamosal bone. In platyrrhines, either terminus of the annulus may be completely, partially, or not at all synostosed with the squamous portion of the temporal bone. This condition likely arose from a primitive tarsioid, or haplorhine, in which an externally positioned tympanic annulus is completely separated from the squamosal bone, as in living Tarsius. The ectotympanic bone in lemuroids, on the other hand, is suspended from the squamosal bone inside a fully formed tympanic bulla and could not have evolved into the type of external auditory meatus common to Tarsius and higher primates. Fossil evidence indicates that the tympanic annulus of the Oligocene parapithecid Apidium is haplorhine.

ISSN:0015-5713    

DOI:10.1159/000155628

出版商:S. Karger AG    

年代:1974

数据来源: Karger

摘要:

A new early Eocene primate, Tinimomys graybulliensis, is described from the early Eocene of Wyoming. The common paromomyid ancestor of both the new taxon and Micromomys silvercouleei has developed conspicuously enlarged fourth premolars, independently from those of Phenacolemur (sensu stricto) or other early Tertiary primates with similar adaptations.

ISSN:0015-5713    

DOI:10.1159/000155629

出版商:S. Karger AG    

年代:1974

数据来源: Karger

摘要:

During pregnancy, female patas monkeys (Erythrocebus patas pyrronotus) exhibit a characteristic set of bodily color changes. These changes, certain of which may be used as ‘pregnancy signs’, are described and quanti

ISSN:0015-5713    

DOI:10.1159/000155630

出版商:S. Karger AG    

年代:1974

数据来源: Karger

摘要:

Crab-eating macaques on Angaur are an exotic fauna introduced to the island in the early 1900’s. The present population of 480-600 animals reportedly are descendents of a pair of monkeys brought to the island by German phosphate miners. During a 10-Week period, June to August, 1973, we spent a total of 253:30 hours in the field locating and studying monkeys. Of this total, 75:30 hours are direct observation time. This article discusses aspects of the ecology, social behavior, and problems of adaptation of the Angaur crab-eating macaques.

ISSN:0015-5713    

DOI:10.1159/000155631

出版商:S. Karger AG    

年代:1974

数据来源: Karger

摘要:

Crab-eating macaques on Angaur are an exotic fauna introduced to the island in the early 1900’s. The present population of 480-600 animals reportedly are descendents of a pair of monkeys brought to the island by German phosphate miners. During a 10-Week period, June to August, 1973, we spent a total of 253:30 hours in the field locating and studying monkeys. Of this total, 75:30 hours are direct observation time. This article discusses aspects of the ecology, social behavior, and problems of adaptation of the Angaur crab-eating macaques.

ISSN:0015-5713    

DOI:10.1159/000317609

出版商:S. Karger AG    

年代:1974

数据来源: Karger

摘要:

Two studies examined the responses of rhesus monkey infants to various stimuli. It was found that all subjects explored the stimulus objects manually more than orally or pedally and increased their exploration with increasing exposure to the stimulus objects. With respect to specific stimuli, subjects explored a movable object more than a stationary object, but did not so differentiate between an inanimate toy squirrel and an animate social peer.

ISSN:0015-5713    

DOI:10.1159/000155632

出版商:S. Karger AG    

年代:1974

数据来源: Karger

摘要:

A total of 38 intrinsic laryngeal muscles from baboon (Papio papio), rhesus macaque (Macaca mulatto) and pigtail macaque (M. nemestrina) were examined for the presence of muscle spindles. A total of 20 spindles were found distributed within 10 thyroarytenoid, 8 cricothyroid, and 11 posterior cricoarytenoid muscles. Spindle density in these samples is similar to that reported for these muscles in humans. The morphological features of the spindles were found to be similar for human and nonhuman primates.

ISSN:0015-5713    

DOI:10.1159/000155633

出版商:S. Karger AG    

年代:1974

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000155634

出版商:S. Karger AG    

年代:1974

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000155635

出版商:S. Karger AG    

年代:1974

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000155636

出版商:S. Karger AG    

年代:1974

数据来源: Karger