| Abstrakt: |
Abstract: A laboratory marsupial Monodelphis domestica was used in this study to complete previous comparative anatomical studies of mammalian contrahentes muscles. The contrahent muscle layer is generally characterized as a developmentally old structure in mammals. I is found in reduced and transformed form in different ordes. In Monodelphis domestica this layer was found to be formed in the whole extent of the palm splitting distaly into 4 muscles, the reduction and disappearance of individual portions of the contrahentes layer occures. No such process was observed in the ontogeny of the contrahent muscle layer of Monodelphis. It supports the idea, that the extent of the layer of mm. contrahentes in Monodelphis proves the phylogenetically ancient pattern. |
