Results 161 to 170 of about 25,718 (208)

The Karyotype of Cacajao melanocephalus (Platyrrhini, Primates)

Folia Primatologica, 1981
Chromosome studies were performed in a male representative of Cacajao melanocephalus. The diploid number was 45: the chromosome complement consisting of 12 pairs of acrocentric autosomes, 9 pairs of biarmed autosomes and 1 heteromorphic pair composed of one subtelocentric and one acrocentric chromosome.
C P, Koiffmann, P H, Saldanha
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β 2 -microglobulin in neotropical primates (Platyrrhini)

Immunogenetics, 1998
Nucleotide sequences for the three exons of the beta2-microglobulin (beta2m) gene (B2m) were determined for 135 animals representing 37 species and all 16 genera of neotropical primates (Platyrrhini). Twenty-eight different nucleotide sequences, encoding for 26 different proteins, were obtained.
F C, Canavez, J J, Ladasky, J A, Muniz, H N, Seuánez, P, Parham, C, Cavanez   +5 more
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Alpha satellite DNA in neotropical primates (Platyrrhini)

Chromosoma, 1994
The alpha satellite DNA of Old World (catarrhine) primates usually consists of similar, but not identical, ca. 170 bp sequences repeated tandemly hundreds to thousands of times. The 170 bp monomeric repeats are components of higher-order repeats, many of which are chromosome specific.
G, Alves, H N, Seuánez, T, Fanning
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The meiotic chromosomes of Cebus apella (Cebidae, Platyrrhini)

Cytogenetics and Cell Genetics, 2008
An analysis of the meiotic chromosomes of Cebus apella (Cebidae, Platyrrhini) has allowed for the visualization of constitutive heterochromatic regions throughout the meiotic cycle and has permitted the identification of four chromosomes in the first and the second divisions.
H N, Seuánez, J L, Armada, C, Barroso, C, Rezende, V F, da Silva   +4 more
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Phylogeographic Analyses of Callicebus lugens (Platyrrhini, Primates)

Journal of Heredity, 2006
A phylogeographic study of Callicebus lugens was carried out based on cytochrome b DNA sequence data. Here, we report, for the first time, the distribution of C. lugens south of the Rio Negro, in Barcelos municipality (Amazonas State, Brazil), indicating that this river is not the southern boundary of the distribution of this species as previously ...
Flávia, Casado, Cibele R, Bonvicino, Héctor N, Seuánez   +2 more
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Chromosome painting comparison of Leontopithecus chrysomelas (Callitrichine, Platyrrhini) with man and its phylogenetic position

Chromosome Research, 2004
International audienceUsing human probes of whole chromosomes, the homoeologies between human and Leontopithecuschrysomelas (Platyrrhini) karyotypes were established. Thirty-three conserved segments were observedbetween the two species.
Amélie Bonnet-Garnier, Dutrillaux B
exaly   +2 more sources

Systematics and evolution of the jacchus group of marmosets (Platyrrhini)

American Journal of Physical Anthropology, 2003
AbstractInterspecific differentiation and geographic variation patterns in 39 skull traits of eastern Brazilian marmosets are analyzed. EasternCallithrixtaxa are distinct morphologically, and no evidence of intergradation among taxa is observed. Instead, there are sharp, stepped morphological boundaries among taxa, consistent with species‐level ...
Gabriel, Marroig, Susan, Cropp, James M, Cheverud   +2 more
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SRY Evolution in Cebidae (Platyrrhini: Primates)

Journal of Molecular Evolution, 2002
Sex determination in mammals is dependent on the presence of SRY, which codes for a protein with a DNA binding motif (the HMG-box domain). Here we analyze the evolution of SRY among seven genera of New World monkeys belonging to the family Cebidae. Estimates of the number of synonymous and nonsynonymous substitutions indicated the absence of positive ...
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Paleobiogeographic Perspectives on the Origin of the Platyrrhini

1980
This chapter will explore the various hypotheses and scenarios that have been advanced concerning the paleobiogeographic source of origin of the Platyrrhini. The specific questions to be addressed include: (1) From what geographical region or regions were the immediate ancestors of the New World monkeys derived?
R. L. Ciochon, A. B. Chiarelli
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Callitrichids as phyletic dwarfs, and the place of the callitrichidae in platyrrhini

Primates, 1980
Cebuella, Callithrix, Leontopithecus, andSaguinus share five distinguishing features. All of these features are best interpreted as derived character states within Platyrrhini, and these animals are phyletic dwarfs. These derived traits may form a single complex that evolved as a result of dwarfing.
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