Epizootics of an acute, fatal hepatitis affecting tamarins and marmosets (family Callitrichidae) have been reported in two zoos in the U.S. and Europe. Two new epizootics of hepatitis affecting seven golden lion tamarins (Leontopithecus rosalia) and three emperor tamarins (Saguinus imperator) were identified at the Oklahoma City Zoo in 1984 and 1986. Livers from these animals showed hepatocellu...

(To appear in R. W. Sussman and R. Cloniger (eds.) Origins of Altruism and Cooperation 6 Elsevier) 7 8 Affiliations take many forms in the social relationships of both human and nonhuman 9 primates. Which relationships are most important will vary as a function of the social structure 10 and breeding system that is typical of a species and will also vary with life history stages within a 11 spe...

Because of the necessity of lactation, mammalian mothers must perform at least a minimum amount of infant care. In cooperatively breeding species, other group members aid in all other aspects of infant care. However, some mothers continue to carry and nurse their infants more than others. The golden lion tamarin, Leontopithecus rosalia, is a small, communally breeding primate in the family Call...

Eight subspecies from the genus Saguinus (S. fuscicollis fuscicollis, S. fuscicollis weddelli, S. bicolor bicolor, S. bicolor martinsi, S. mystax mystax, S. imperator imperator, S. midas midas, and S. midas niger) were studied. Five of them (S. f. fuscicollis, S. f. weddelli, S. b. martinsi, S. m. mystax and S. i. imperator) had their karyotypes described for the first time. Conventional colora...