Jorge W, Meritt D A, Benirschke K
Cytobios. 1978;18(71-72):157-72.
The karyotypes of three additional species of Edentata are described. The differences in karyotype between Tolypeutes matacus (2n = 38), and other species of armadillo is remarkable. Three species of Euphractini were compared through G- and C-banding patterns. Chaetophractus villosus appears to be much closer to Zaedyus pichiy than suggested by taxonomy. On the other hand, Tamandua tetradactyla and Tamandua longicaudata, two different species of anteater, possess the same karyotypes. The presence of an unusual Y-chromosome in Choloepus hoffmanni may be responsible for the peculiar sex-ratio reported in this species.
本文描述了另外三种贫齿目动物的核型。长毛犰狳（2n = 38）与其他犰狳物种的核型差异显著。通过G带和C带模式对三种倭犰狳属动物进行了比较。绒毛倭犰狳似乎比分类学所显示的更接近皮氏倭犰狳。另一方面，两种不同的食蚁兽物种，即小食蚁兽和长尾食蚁兽，具有相同的核型。霍氏树懒中存在异常的Y染色体可能是该物种所报道的特殊性别比例的原因。
