JMDMT #890 Microfossils of Cyanobacteria in Carbonaceous Meteorites

The James M. DuPont Meteorite Collection - / possibly / air occurs. Magnification 770 x . Figure 13a A type 5 organized element after Gridley staining. Focused to show the three tubular protrusions of the body. Magnifi- cation 590 x . Figure 13b Same object focused on two of the protrusions only. Magnification 590 x . Claus et al.\ "Organized Elements" in Chondrites 591 variedly shaped "nucleus" or hilum and the layered starch is around it. The mcoposition of the "hilum" is unknown. It seems that it is proteinaceous in nature. The sole exception from this is represented by Rhodophyta, in which the so-called Floridean starch develops always in the cytoplasms, is unlayered and is lacking a "nucleus." This compound, however, is closer to glycogen in its composition as it stains brown instead of blue with iodine.