Haight J R, Neylon L
Brain Behav Evol. 1978;15(5-6):415-45. doi: 10.1159/000123791.
The brush-tailed possum, Trichosurus vulpecula, displays an unusual amount of phenotypic variation within its central nervous system. These variations are expressed in terms of gross brain morphology, as evidenced by the occurrence of both highly lissencephalic and gyrencephalic neocortices in apparently normal adult animals; by displacement and asymmetry of certain internal structures, notably within the ventral thalamic nuclei; and by the inconstant occurrence of at least one cell group within the thalamus. These variations are described and discussed with reference to possible functional, ontogenetic and phylogenetic significance.
帚尾袋貂（Trichosurus vulpecula）在其中枢神经系统内表现出异常数量的表型变异。这些变异体现在大脑的总体形态上，明显正常的成年动物中出现高度平滑脑和脑回脑新皮质就是证明；某些内部结构存在移位和不对称，尤其是在腹侧丘脑核内；并且丘脑内至少有一个细胞群的出现情况不稳定。本文参照可能的功能、个体发生和系统发育意义对这些变异进行了描述和讨论。
