Mudry M D
Cytogenetic Department of Haematologic Research Institute Mariano R. Castex, National Academy of Medicine, Buenos Aires, Argentina.
Folia Primatol (Basel). 1990;54(3-4):206-16. doi: 10.1159/000156445.
Two geographically separated populations of Cebus apella are found in Argentina. We have found important differences in the phenotypic characteristics of these populations, despite marked karyotypic similarity. Two well-distinguished phenotypes were established. Individuals from the northwest of Argentina are phenotypically similar to the Paraguayan populations and are recognized as C. apella paraguayanus. This subspecies is also found in the northeast of Argentina. Other specimens from the northeast are more similar phenotypically to the Brazilian subspecies C. apella nigritus and C. apella libidinosus and are designated as C. apella vellerosus. The two subspecies C. apella paraguayanus and C. apella vellerosus share the same diploid number of chromosomes (2n = 54). Cytogenetic comparisons using G-, Q- and R-banding techniques and C-banding methods with the chromosomes carrying large heterochromatic blocks (No. 3, 5, 11, 12, 13, 19) showed differences between the subspecies. The presence of different polymorphisms and even of heteromorphisms in the same chromosomic pair across geographically isolated populations of the same subspecies is illustrated with Argentinian and Paraguayan specimens.
在阿根廷发现了两个地理上隔离的白喉卷尾猴种群。尽管核型有显著相似性，但我们发现这些种群在表型特征上存在重要差异。确定了两种明显不同的表型。来自阿根廷西北部的个体在表型上与巴拉圭种群相似，被认定为巴拉圭白喉卷尾猴。该亚种在阿根廷东北部也有发现。来自东北部的其他标本在表型上更类似于巴西亚种黑喉白喉卷尾猴和黄腹白喉卷尾猴，被指定为绒毛白喉卷尾猴。巴拉圭白喉卷尾猴和绒毛白喉卷尾猴这两个亚种具有相同的二倍体染色体数（2n = 54）。使用G带、Q带和R带技术以及C带方法对携带大异染色质块的染色体（第3、5、11、12、13、19号）进行细胞遗传学比较，结果显示亚种之间存在差异。阿根廷和巴拉圭的标本表明，在同一亚种的地理隔离种群中，同一染色体对中存在不同的多态性甚至异形性。
