| sequences from the 5' flanking region of the epsilon-globin gene support the relationship of callicebus with the pitheciins. | the purpose of this study was to determine nucleotide sequences from the 5' flanking region of the epsilon-globin gene of selected platyrrhine primates and to analyze the data for phylogenetic information and estimated times of divergence. we report new sequence data for two species of new world monkeys, callicebus torquatus and pithecia irrorata. we analyzed these data in conjunction with homologous sequences from other primate species. the data support the hypothesis that the titi monkeys (cal ... | 1999 | 10326771 |
| first come, first serve: "sit and wait" behavior in dung beetles at the source of primate dung. | dung beetles (coleoptera: scarabaeidae: scarabaeinae) compete intensively for dung resources, and most species forage in the understory. here, we describe the unique behavior of one dung beetle species, canthon aff. quadriguttatus (olivier), associated with two species of monkeys from peru. we observed this beetle species on the genital and anal regions of the brown titi monkey, callicebus brunneus (wagner), and subsequently falling with dung as the monkeys defecated. the same association was al ... | 2008 | 19169550 |
| naturally acquired visceral leishmaniasis in non-human primates in brazil. | visceral leishmaniasis (vl) is a chronic and often fatal protozoal disease that is endemic in belo horizonte (state of minas gerais, brazil). leishmania sp. is an intracellular obligatory parasite of macrophages that can naturally infect several mammalian species. non-human primates (nhp) have been used as experimental models for infection with leishmania of the donovani complex. the present report describes a case of visceral leishmaniasis in a black-fronted titi. among 41 primates kept in capt ... | 2010 | 20056328 |
| chromosome phylogeny of the subfamily pitheciinae (platyrrhini, primates) by classic cytogenetics and chromosome painting. | the new world monkey (platyrrhini) subfamily pitheciinae is represented by the genera pithecia, chiropotes and cacajao. in this work we studied the karyotypes of pithecia irrorata (2n = 48) and cacajao calvus rubicundus (2n = 45 in males and 2n = 46 in females) by g- and c-banding, nor staining and chromosome painting using human and saguinus oedipus whole chromosome probes. the karyotypes of both species were compared with each other and with chiropotes utahicki (2n = 54) from the literature. | 2010 | 20565908 |
| fatal infections in a captive pithecia irrorata (primate) by porocephalus sp. (pentastomida). | this work presents a case of sudden death of a non-human adult male primate, which belongs to the national primate center (cenp - ananindeua - pará - brazil). the specimen was necropsied, and the anatomicopathologic exam showed a great collection of clotted blood in the right thoracic cavity, forming a mold. the aorta revealed an extensive lesion in its intima with a disruption area in its tissue. in the lungs, three encapsulated parasites were observed in subpleural location, specifically in th ... | 2010 | 20850934 |
| a clade of new world primates with distinctive alphoid satellite dnas. | centromerically located alphoid satellite dnas are present in all primates. they typically consist of arrays of a 340-bp monomeric unit that is composed of related, but diverged, 170-bp subunits. a unique monomeric unit has recently been described: the alphoid satellite monomers of the neotropical primate chiropotes satanas (bearded saki) are typically 539 bp in length. in addition, a number of smaller satellite sequences are present in this species. analysis of two primates closely related to c ... | 1998 | 9562981 |
| observations of termitarium geophagy by rylands' bald-faced saki monkeys (pithecia rylandsi) in madre de dios, peru. | geophagy, or soil consumption, has been documented in diverse animal taxa, including many primates. physiological functions such as mineral supplementation, detoxification of secondary compounds, and antacid properties are possible causes for this behavior. we report on observations of geophagy at arboreal termitaria by free-ranging pithecia rylandsi at la estación biológica los amigos (ebla) in perú between 2008 and 2015. characteristics of geophagy events, including saki monkey behavior at the ... | 2017 | 28500509 |
| fatal attack on a rylands' bald-faced saki monkey (pithecia rylandsi) by a black-and-white hawk-eagle (spizaetus melanoleucus). | predation risk has played an important role in primate behavioral evolution, yet natural primate-predator interactions are rarely observed. we describe the consumption and probable predation of an adult bald-faced saki monkey (pithecia rylandsi) by a black-and-white hawk-eagle (spizaetus melanoleucus) at the los amigos biological station in lowland amazonian peru. to our knowledge, this is the first published case of a black-and-white hawk-eagle consuming any primate species. we contend that whi ... | 2017 | 28180973 |
| determinants of spatial behavior of a tropical forest seed predator: the roles of optimal foraging, dietary diversification, and home range defense. | specialized seed predators in tropical forests may avoid seasonal food scarcity and interspecific feeding competition but may need to diversify their daily diet to limit ingestion of any given toxin. seed predators may, therefore, adopt foraging strategies that favor dietary diversity and resource monitoring, rather than efficient energy intake, as suggested by optimal foraging theory. we tested whether fine-scale space use by a small-group-living seed predator-the bald-faced saki monkey (pithec ... | 2016 | 25807916 |
| comparison of gut proportions in four small-bodied amazonian cebids. | gut proportions in four small-bodied amazonian cebids (callicebus caligatus, callicebus moloch, pithecia irrorata, and saimiri madeirae) are reported and compared in the context of known differences in feeding ecology. the gastrointestinal tracts of both callicebus and pithecia were found to be relatively undifferentiated, as expected from their predominantly frugivorous diets. in saimiri, the marked dominance of the small intestine correlates with a highly insectivorous diet. © 1995 wiley-liss, ... | 1995 | 31924064 |