| chromosome painting defines genomic rearrangements between red howler monkey subspecies. | we hybridized whole human chromosome-specific dna libraries to chromosomes of two supposed subspecies of alouatta seniculus: alouatta seniculus sara and alouatta seniculus arctoides. the number of hybridization signals per haploid set is 42 in a. s. sara and 43 in a. s. arctoidea; the two karyotypes differ by at least 16 chromosomal rearrangements, including numerous translocations. an unusual sex chromosome system is shared by both taxa. the sex chromosome system results from a y translocation ... | 1996 | 8817065 |
| meiosis and chromosome painting of sex chromosome systems in ceboidea. | the identity of the chromosomes involved in the multiple sex system of alouatta caraya (aca) and the possible distribution of this system among other ceboidea were investigated by chromosome painting of mitotic cells from five species and by analysis of meiosis at pachytene in two species. the identity of the autosome #7 (x2) involved in the multiple system of aca and its breakage points were demonstrated by both meiosis and chromosome painting. these features are identical to those described by ... | 2001 | 11376445 |
| molecular systematics and biogeography of the neotropical monkey genus, alouatta. | we take advantage of the broad distribution of howler monkeys from mexico to argentina to provide a historical biogeographical analysis on a regional scale that encompasses the entire neotropics. the phylogenetic relationships among 9 of the 10 recognized alouatta species were inferred using three mitochondrial and two nuclear genes. the nuclear gene regions provided no phylogenetic resolution among howler monkey species, and were characterized by very low levels of sequence divergence between a ... | 2003 | 12470939 |
| a phylogeny of howler monkeys (cebidae: alouatta) based on mitochondrial, chromosomal and morphological data. | the current taxonomic status of the species and subspecies belonging to the genus alouatta is addressed by combined phylogenetic analysis using morphological, kariotipyc and molecular data (mitochondrial genes cytocrome oxidase ii and cytochrome b). our result demonstrated that alouatta palliata is the most basal taxon for the genus in concordance with previous studies, as well as showing the validity of the taxon alouatta sara as a species. also our analysis shows that the sex chromosome has ev ... | 2004 | 17361560 |
| synteny of human chromosomes 14 and 15 in the platyrrhines (primates, platyrrhini). | in order to study the intra- and interspecific variability of the 14/15 association in platyrrhini, we analyzed 15 species from 13 genera, including species that had not been described yet. the dna libraries of human chromosomes 14 and 15 were hybridized to metaphases of alouatta guariba clamitans, a. caraya, a. sara, ateles paniscus chamek, lagothrix lagothricha, brachyteles arachnoides, saguinus midas midas, leontopithecus chrysomelas, callimico goeldii, callithrix sp., cebus apella, aotus nig ... | 2009 | 21637455 |
| morphological, ultrastructural, and molecular characterization of intestinal tetratrichomonads isolated from non-human primates in southeastern brazil. | non-human primates are our closest relatives and represent an interesting model for comparative parasitological studies. however, research on this topic particularly in relation to intestinal parasites has been fragmentary and limited mainly to animals held in captivity. thus, our knowledge of host-parasite relationships in this species-rich group of mammals could be considered rudimentary. the current study combined morphological, ultrastructural, and molecular analyses to characterize isolates ... | 2017 | 28702802 |
| molecular phylogenetic inference of the howler monkey radiation (primates: alouatta). | howler monkeys (alouatta), comprising between nine and 14 species and ranging from southern mexico to northern argentina, are the most widely distributed platyrrhines. previous phylogenetic studies of howlers have used chromosomal and morphological characters and a limited number of molecular markers; however, branching patterns conflict between studies or remain unresolved. we performed a new phylogenetic analysis of alouatta using both concatenated and coalescent-based species tree approaches ... | 2020 | 32876810 |