Abstract
The nucleus-like body was found in the fossil seed wing of Picea mkximowiczii collected from the Plio-Pleistocene Osaka Group. The brief description of the nucleus-like body is as follows. One cell in the fossil wing has one nucleus-like body of which color is dark brown. Each nucleus-like body in cells is about 0.01 mm in diameter. The shapes of nucleus-like bodies are classified into two types, that is, one is circular and the other is semicircular.Especially, it is remarkable that all of the nucleus-like bodies of semicircular type attach to the cell wall. Observing the nuclei in cells of the wing of the Genus Picea living now they show the same morphological characters as the nucleus-like body descripted above. For example the semicircular nuclei are also observed in the cells of the rather adult wing of Picea glauca and all of the them attach to the cell wall, as in the case of the nucleus-like body of fossil wing. Judging from the fact that the nucleus-like body has some features common with nucleus of recent sample, it is highly probable that the nucleus-like body originated from nucleus.
