Results 131 to 140 of about 25,290 (175)

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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Electrophoretic Polymorphisms and Their Taxonomic Implications in Callitrichini (Primates, Platyrrhini)

Biochemical Genetics, 1998
Five hundred forty-three blood samples from 15 populations of the four genera of callitrichin primates were studied electrophoretically. Polymorphism and genetic distances were estimated for 20 loci, 13 of which were polymorphic. The lion tamarin (Leontopithecus) studied here exhibited the least variability for these loci, while the monospecific ...
C M, Meireles, J, Czelusniak, I, Sampaio, H, Schneider, S F, Ferrari, A F, Coimbra-Filho, A, Pissinatti, J A, Muniz, H S, Ferreira, M P, Schneider   +9 more
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Molecular Phylogeny of the New World Monkeys (Platyrrhini, Primates)

Molecular Phylogenetics and Evolution, 1993
Phylogenetic relationships among the 16 extant genera of Ceboidea (the New World monkeys) were examined using aligned epsilon-globin gene sequences from 19 New World monkeys (representing all 16 extant ceboid genera), and seven catarrhines (one Old World monkey and six hominoids) and tarsier as the outgroups.
H, Schneider, M P, Schneider, I, Sampaio, M L, Harada, M, Stanhope, J, Czelusniak, M, Goodman   +6 more
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Phylogenetic Relationships of the Platyrrhini

1980
The major problem addressed in this volume concerns the origin of the New World monkeys. This problem is sometimes simplified to the question of whether they came from North America or from Africa. However, the biological problem is actually more complex and can be treated as four separate hypotheses: (1) descent of platyrrhines from an omomyid ...
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AVPR1b variation and the emergence of adaptive phenotypes in Platyrrhini primates

American Journal of Primatology, 2019
AbstractPlatyrrhini (New World monkeys, NWm) are a group of primates characterized by behavioral and reproductive traits that are otherwise uncommon among primates, including social monogamy, direct paternal care, and twin births. As a consequence, the study of Platyrrhine primates is an invaluable tool for the discovery of the genetic repertoire ...
Bibiana S. O. Fam, Guillermo Reales, Pedro Vargas‐Pinilla, Pamela Paré, Lucas H. Viscardi, Vinicius A. Sortica, Aline B. Felkl, Álvaro de O. Franco, Aldo B. Lucion, Claudio M. Costa‐Neto, Alcides Pissinatti, Francisco M. Salzano, Vanessa R. Paixão‐Côrtes, Maria Cátira Bortolini   +13 more
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Comparative karyology and evolution of the Amazonian Callithrix (Platyrrhini, Primates)

Chromosoma, 1996
Chromosomal studies in three species of Amazonian Callithrix (2n=44) and data in the literature show that this group is karyomonotypic. Moreover, it is characterized by the presence of abundant heterochromatic regions, unlike the situation in congeneric forms of Callithrix of the Atlantic coast with 2n=46, and by the presence of a highly repetitive ...
F, Canavez, G, Alves, T G, Fanning, H N, Seuánez   +3 more
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Molecular phylogenetics of howler monkeys (Alouatta, Platyrrhini)

Chromosoma, 2001
Molecular phylogenetic analyses of seven Brazilian Alouatta species, based on cytochrome b DNA sequence data were carried out. Parsimony and neighbor joining topologies grouped Alouatta belzebul and A. fusca as sister groups in one clade while another, well-supported clade contained A. seniculus as the most basal offshoot, followed by A. nigerrima as a
C R, Bonvicino, B, Lemos, H N, Seuánez
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The Y Chromosome of the Atelidae Family (Platyrrhini): Study by Chromosome Microdissection

Cytogenetic and Genome Research, 2009
In order to study the intergeneric variability of the Y chromosome, we describe the hybridization of the Y chromosome of <i>Brachyteles</i><i>arachnoides</i>, obtained by microdissection, to metaphases of <i>Ateles</i><i>belzebuth</i><i>marginatus</i>, <i>Lagothrix</i><i> ...
C, Gifalli-Iughetti, C P, Koiffmann
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