JMDMT #263 Microfossils of Cyanobacteria in Carbonaceous Meteorites

The James M. DuPont Meteorite Collection - groups. It is recognized that the major taxa of algae may show Httle afi&nity with each other (Papenfuss, 1955), but they are still grouped on the basis of an "algal-type" of organization, the parallelism cited in the evolution of plant- body types, the morphology and physiology of the individual cells (Smith, 1950), photosynthates, and especially in regard to the principal protoplasmic pigments (Dougherty and Allen, 1960). Blue-green algae contain the phyco- bilins C-phycoerythrin and C-phycocyanin not found in other algae or bacteria although phycobilins are characteristic for red algae and have also been found in other groups, e.g., green algae and cryptomonads (Eocha, 1960). Chlo- rophyll a, and /3-carotene are shared in common with other algal groups,